Aromatic hydrocarbon organic liquid volatilization inhibitor and method of inhibiting volatilization of aromatic hydrocarbon organic liquids

Abstract

The present application relates to VOCs source treatment technical field, disclose a kind of aromatic hydrocarbon organic liquid volatilization inhibitor and the method for inhibiting aromatic hydrocarbon organic liquid volatilization.The aromatic hydrocarbon organic liquid volatilization inhibitor contains hollow microsphere, surfactant, stabilizer, dispersant, coupling agent and solvent, for inhibiting the volatilization of aromatic hydrocarbon organic liquid;Wherein, the density of the aromatic hydrocarbon organic liquid volatilization inhibitor < the density of the aromatic hydrocarbon organic liquid, and the density of the aromatic hydrocarbon organic liquid volatilization inhibitor is 0.65-0.8g / mL.The density of aromatic hydrocarbon organic liquid volatilization inhibitor provided by the present application is 0.65-0.8g / mL, less than the density of aromatic hydrocarbon organic liquid, the inhibitor has certain flowability and stability, can realize to aromatic hydrocarbon organic liquid surface automatic covering and complete sealing, effectively prevent aromatic hydrocarbon organic liquid volatilization in storage, loading and transportation process.

Description

Technical Field

[0001] This invention relates to the field of VOCs source control technology, specifically to an inhibitor of aromatic organic liquid volatilization and a method for inhibiting the volatilization of aromatic organic liquid. Background Technology

[0002] Existing atmospheric pressure storage tanks for volatile liquids are classified into internal floating roof tanks, external floating roof tanks, and dome-roof tanks. Among them, dome-roof tanks lack effective source control measures and require the use of interconnected pipelines to collect VOCs before centralized treatment with oil and gas recovery devices. However, this poses a safety risk of cascading fires after the tanks are interconnected, and its continued use is no longer recommended.

[0003] External floating roof tanks can only reduce VOC emissions at the source by using external floating roofs and sealing measures. However, large tanks are prone to deformation, and existing sealing materials cannot meet the needs of the deformation space, leading to incomplete sealing of the liquid surface and large-scale VOC emissions. On the other hand, during the up-and-down movement of the floating roof and high-efficiency seals, volatile liquids remain on the inner wall of the tank. Existing sealing measures cannot suppress the evaporation of these residual liquids, thus causing VOC emissions. Internal floating roof tanks use internal floating roofs and high-efficiency seals to suppress the evaporation of volatile liquids. However, due to tank deformation, oil buildup on the inner wall of the tank, and gaps in the connection of the internal floating roof, they cannot fundamentally suppress VOCs.

[0004] The above-mentioned floating roofs cannot fully contact the oil, and flash explosions caused by the presence of oil and gas have occurred many times during use. In addition, rigid floating roofs have also experienced accidents such as jamming and sinking many times during use, so the performance of floating roofs is not ideal.

[0005] During the transportation of large oil tankers, fluctuations in the oil level generate significant amounts of VOCs. Current practice involves inertization of the vapor space above the oil tanker's storage tanks; however, this method cannot completely prevent VOC generation. Particularly during loading, according to relevant standards, the oxygen content in the ship-to-shore safety docking module at the oil tanker terminal must be less than 11% VOL. Because many oil tankers lack inertization capabilities, the oxygen content in the cargo holds exceeds this standard, rendering the terminal or shore-based oil and gas recovery devices ineffective, resulting in excessive VOC emissions during the loading process.

[0006] The maximum design pressure of the above-mentioned atmospheric pressure storage tanks is generally slightly positive pressure, which cannot effectively suppress the volatilization of oil products. There is an urgent need to develop a technology that is self-flowing, completely sealed, does not jam or sink, and effectively suppresses VOCs adhering to the wall. Summary of the Invention

[0007] The purpose of this invention is to overcome the problems of existing technologies, such as the difficulty in effectively suppressing VOCs volatilization when storing volatile organic liquids in atmospheric pressure tanks, the potential for various accidents during the use of internal and external floating roofs, and the difficulty in controlling VOCs volatilization during oil tanker loading and transportation. This invention provides an aromatic organic liquid volatilization inhibitor and a method for inhibiting the volatilization of aromatic organic liquids. The aromatic organic liquid volatilization inhibitor provided by this invention has a density of 0.65–0.8 g / mL, which is less than the density of aromatic organic liquids. This inhibitor has a certain degree of fluidity and stability, enabling automatic coverage and complete sealing of the aromatic organic liquid surface, effectively preventing volatilization of aromatic organic liquids during storage, loading, and transportation.

[0008] To achieve the above objectives, the first aspect of the present invention provides an aromatic organic liquid volatilization inhibitor, which contains hollow microspheres, a surfactant, a stabilizer, a dispersant, a coupling agent, and a solvent, for inhibiting the volatilization of aromatic organic liquids;

[0009] Wherein, the density of the aromatic organic liquid volatilization inhibitor is less than the density of the aromatic organic liquid, and the density of the aromatic organic liquid volatilization inhibitor is 0.65-0.8 g / mL.

[0010] Preferably, the solvent is water.

[0011] Preferably, the aromatic organic liquid is at least one of benzene, toluene, o-xylene, and styrene.

[0012] Preferably, the density of the aromatic organic liquid is 0.82 to 0.95 g / mL.

[0013] Preferably, the content of hollow microspheres is 3 to 15 parts by weight, more preferably 6 to 10 parts by weight, relative to 100 parts by weight of the solvent.

[0014] Preferably, the density of the hollow microspheres is 0.05–0.6 g / mL, and more preferably 0.1–0.3 g / mL.

[0015] Preferably, the median particle size D50 of the hollow microspheres is 5–500 μm, and more preferably 10–100 μm.

[0016] Preferably, the hollow microspheres are made of soda lime borosilicate glass.

[0017] Preferably, the surfactant content is 0.01 to 6 parts by weight, more preferably 0.03 to 2 parts by weight, relative to 100 parts by weight of the solvent.

[0018] Preferably, the surfactant is a small molecule water-soluble surfactant with a molecular weight of 300 to 1000 and / or a high molecular weight water-soluble surfactant with a molecular weight of 8000 to 30000.

[0019] More preferably, the small molecule water-soluble surfactant is selected from at least one of sodium oleate, sodium laurylate, sodium stearate, sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, octadecylamine, cocoylamine, and dodecylamine.

[0020] More preferably, the high molecular weight water-soluble surfactant is selected from at least one of polyacrylate and its derivatives, polyethyleneimine, polyvinylpyrrolidone, polyacrylamide and its derivatives, polyvinyl alcohol, polyoxyethylene polyoxypropylene ether, polyvinyl ether, polyquaternary ammonium salt and fatty alcohol polyoxyethylene ether.

[0021] Preferably, the content of the stabilizer is 0.05 to 2 parts by weight, more preferably 0.2 to 1 part by weight, based on the weight of the solvent.

[0022] Preferably, the stabilizer is selected from cellulose compounds and / or starch.

[0023] More preferably, the cellulose compound is selected from at least one of methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylcellulose, and hydroxypropylmethylcellulose.

[0024] Preferably, the content of the dispersant is 0.1 to 6 parts by weight, more preferably 0.5 to 3 parts by weight, relative to 100 parts by weight of the solvent.

[0025] Preferably, the dispersant is a cationic dispersant and / or a polymeric dispersant.

[0026] More preferably, the cationic dispersant is selected from at least one of amine salts, quaternary ammonium salts, and pyridinium salts.

[0027] More preferably, the polymeric dispersant is selected from at least one of polycaprolactone polyol-polyethyleneimine block copolymer dispersants, acrylic polymeric dispersants, polyurethane and polyester polyamide dispersants.

[0028] Preferably, the coupling agent content is 0.05 to 8 parts by weight, more preferably 0.2 to 4 parts by weight, relative to 100 parts by weight of the solvent.

[0029] Preferably, the coupling agent is selected from at least one of silane coupling agents, titanate coupling agents, aluminate coupling agents, zirconate coupling agents, and organic complexes.

[0030] Preferably, the organic liquid evaporation inhibitor further contains an antibacterial agent and / or a water-retaining agent.

[0031] Preferably, based on the total weight of the organic liquid volatile inhibitor, the content of the antibacterial agent is 0-1% by weight, preferably 0.04-0.2% by weight.

[0032] Preferably, the antibacterial agent is at least one selected from quaternary ammonium salt compounds, organohalides, pyridine salt compounds, and broad-spectrum bactericides.

[0033] Preferably, the water-retaining agent is selected from at least one of n-hexadecyl alcohol, n-octadecyl alcohol, and n-butanol;

[0034] Preferably, the thickness of the water-retaining agent above the surface of the organic liquid evaporation inhibitor is 3-4 mm.

[0035] Preferably, the viscosity of the organic liquid volatile inhibitor is <2000 cP, the conductivity is 1200-1700 PS / m, and the absolute value of the Zeta potential is 20-40 mV.

[0036] A second aspect of the present invention provides a method for suppressing the volatilization of aromatic organic liquids, the method comprising: delivering the aforementioned aromatic organic liquid volatilization inhibitor to the surface of the aromatic organic liquid.

[0037] Compared with the prior art, the present invention has at least the following advantages:

[0038] (1) The aromatic organic liquid volatile inhibitor provided by this invention mainly consists of high-strength, low-density hollow microspheres and solvents, combined with surfactants, stabilizers, dispersants, and coupling agents. The resulting aromatic organic liquid volatile inhibitor is a fluid floating material that can effectively cover and float above aromatic organic liquids. Specifically, the aromatic organic liquid volatile inhibitor has a lower density than the volatile aromatic organic liquid, possessing certain fluidity and stability, and a relatively low density, enabling automatic coverage of the volatile aromatic organic liquid surface. This aromatic organic liquid volatile inhibitor itself does not contain volatile VOCs and features low vapor pressure, low viscosity, low density, low permeability, and strong stability. It also possesses fluidity, conductivity, flame retardancy, and oleophobicity. Most importantly, in a preferred embodiment, when the solvent is water, the aromatic organic liquid volatile inhibitor provided by this invention mainly consists of inorganic components and is immiscible with the aromatic organic liquid, thus not affecting the quality of the aromatic organic liquid during use.

[0039] (2) In practical applications, the method of using aromatic hydrocarbons to inhibit the volatilization of organic liquids is simple to operate. It only requires the aromatic hydrocarbon volatilization inhibitor to be transported above the aromatic hydrocarbon organic liquid through conventional methods, such as pumping or other means. The inhibitor can flow freely and spread above the aromatic hydrocarbon organic liquid, covering the oil without dead zones. The inhibitor can fluctuate with the level of the aromatic hydrocarbon organic liquid (which can be called a "liquid floating board"). Compared with various metal floating boards, such as aluminum alloy floating boards, fiberglass floating boards, and fully wetted floating boards, it can replace various rigid metal floating boards, or be used in conjunction with existing fully wetted floating boards.

[0040] (3) After using the aromatic organic liquid volatile inhibitor of the present invention, the concentration of VOCs above the surface of the aromatic organic liquid is always less than 1000 ppm (even less than 10 ppm), which is far less than the 2000 ppm requirement for fugitive emissions. In existing internal floating roof tanks, various floating roofs move up and down, leaving organic liquid residues on the inner wall of the tank, leading to VOCs volatilization. With the aromatic organic liquid volatile inhibitor of the present invention, during the rise or fall of the liquid level, the inhibitor prevents VOCs from adhering to the inner wall of the tank. Since the inhibitor leaves a layer on the inner wall, and the aromatic organic liquid and the inhibitor are immiscible, the aromatic organic liquid is difficult to adhere to the inner wall of the tank, thus solving the problem of excessive VOCs concentration caused by volatile liquid adhering to the wall. Depending on actual usage requirements, the thickness of the aromatic organic liquid volatile inhibitor can be 1 cm or higher, with no height limit. This aromatic organic liquid volatilization inhibitor can effectively replace various internal floating discs and high-efficiency sealing measures, making the storage of aromatic organic liquids simpler, safer, and more convenient. During the storage stage, it can effectively reduce the amount of VOCs volatilized, with a volatilization concentration of less than 1000 ppm. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the primary sealing of the external floating roof and the filling of the gas phase space of the rain shield with an organic liquid volatilization inhibitor.

[0042] Figure 2 This is a schematic diagram illustrating the use of organic liquid volatilization inhibitors in atmospheric pressure storage tanks such as fixed tanks and internal floating roof tanks.

[0043] Figure 3 This is a schematic diagram of the oil tanker loading or transportation process.

[0044] Figure 4 This is a SEM image of hollow microspheres.

[0045] Figure 5 This is a zeta potential test graph of inhibitor 1 prepared in Example 1. Detailed Implementation

[0046] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0047] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0048] The present invention provides an aromatic organic liquid volatilization inhibitor containing hollow microspheres, surfactants, stabilizers, dispersants, coupling agents, and solvents, used to inhibit the volatilization of aromatic organic liquids. Because it contains hollow microspheres, surfactants, stabilizers, dispersants, and coupling agents, the aromatic organic liquid volatilization inhibitor provided by the present invention has the characteristics of low density, good flowability, strong stability, and excellent uniformity. In practical applications, controlling the density of the aromatic organic liquid volatilization inhibitor to be less than the density of the aromatic organic liquid effectively inhibits the volatilization of the aromatic organic liquid.

[0049] In this invention, the density of the aromatic organic liquid volatile inhibitor can be determined based on the specific aromatic organic liquid. In some embodiments, the aromatic organic liquid can be at least one of benzene, toluene, o-xylene, and styrene, or various intermediates such as mixed benzene. In a preferred embodiment, the aromatic organic liquid is o-xylene.

[0050] In some embodiments, the density of the aromatic organic liquid volatile inhibitor is generally 0.05–0.25 g / mL less than the density of the aromatic organic liquid, for example, 0.05 g / mL, 0.08 g / mL, 0.1 g / mL, 0.12 g / mL, 0.15 g / mL, 0.18 g / mL, 0.2 g / mL, or 0.25 g / mL. In some embodiments, the density of the aromatic organic liquid is 0.82–0.95 g / mL.

[0051] In this invention, the density of the aromatic organic liquid volatile inhibitor can be controlled by controlling the content of the solvent and other components. In the aromatic organic liquid volatile inhibitor of this invention, in order not to affect the quality of the aromatic organic liquid, in a preferred embodiment, the solvent is water.

[0052] In the aromatic organic liquid volatile inhibitor of the present invention, the hollow microspheres are the main component, and their content and density have a significant impact on the density of the aromatic organic liquid volatile inhibitor. In some embodiments, the content of the hollow microspheres relative to 100 parts by weight of the solvent can be 3 to 15 parts by weight, preferably 6 to 10 parts by weight. In other embodiments, the density of the hollow microspheres can be 0.05 to 0.6 g / mL, preferably 0.1 to 0.3 g / mL.

[0053] In this invention, the hollow microspheres are preferably made of inorganic materials to ensure that the main component of the aromatic organic liquid volatilization inhibitor is an inorganic component, making the aromatic organic liquid volatilization inhibitor immiscible with the aromatic organic liquid, thereby not affecting the quality of the aromatic organic liquid. In one embodiment, the hollow microspheres are made of soda lime borosilicate glass.

[0054] In some embodiments, the median particle size D50 of the hollow microspheres is 5 to 500 μm, preferably 10 to 100 μm.

[0055] In the aromatic organic liquid volatile inhibitors of the present invention, the content of the surfactant is 0.01 to 6 parts by weight, preferably 0.03 to 2 parts by weight, relative to 100 parts by weight of the solvent. In some embodiments, the surfactant may be a small molecule water-soluble surfactant with a molecular weight of 300 to 1000 and / or a high molecular weight water-soluble surfactant with a molecular weight of 8000 to 30000. In some preferred embodiments, the small molecule water-soluble surfactant may be selected from at least one of sodium oleate, sodium laurate, sodium stearate, sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, octadecylamine, cocoylamine, and dodecylamine. In other preferred embodiments, the high molecular weight water-soluble surfactant is selected from at least one of polyacrylate and its derivatives, polyethyleneimine, polyvinylpyrrolidone, polyacrylamide and its derivatives, polyvinyl alcohol, polyoxyethylene polyoxypropylene ether, polyvinyl ether, polyquaternium salt, and fatty alcohol polyoxyethylene ether.

[0056] In the organic liquid evaporation inhibitor of the present invention, the content of the stabilizer can be 0.05 to 2 parts by weight, preferably 0.2 to 1 part by weight, based on the weight of the solvent. In some preferred embodiments, in order to make the organic liquid evaporation inhibitor more stable and more effectively inhibit the evaporation of organic liquid, the stabilizer is selected from cellulosic compounds and / or starch. In some specific embodiments, the cellulosic compound can be selected from at least one of methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylcellulose, and hydroxypropylmethylcellulose.

[0057] In the aromatic organic liquid evaporation inhibitor of the present invention, the content of the dispersant is 0.1 to 6 parts by weight, preferably 0.5 to 3 parts by weight, relative to 100 parts by weight of the solvent. In some preferred embodiments, in order to improve the uniformity of the aromatic organic liquid evaporation inhibitor, further improve the covering effect of the aromatic organic liquid evaporation inhibitor on the aromatic organic liquid, and reduce the evaporation of the aromatic organic liquid, the dispersant is a cationic dispersant and / or a polymeric dispersant. In some embodiments, the cationic dispersant is selected from at least one of amine salts, quaternary ammonium salts, and pyridinium salts. In other embodiments, the polymeric dispersant is selected from at least one of polycaprolactone polyol-polyethyleneimine block copolymer dispersants, polyacrylic acid polymeric dispersants, polyurethane and polyester polyamide dispersants.

[0058] In the aromatic organic liquid volatile inhibitor described in this invention, the content of the coupling agent relative to 100 parts by weight of the solvent can be 0.05 to 8 parts by weight, preferably 0.2 to 4 parts by weight. In this invention, the coupling agent can be a conventional choice in the art. In some embodiments, the coupling agent is selected from at least one of silane coupling agents, titanate coupling agents, aluminate coupling agents, zirconate coupling agents, and organic complexes.

[0059] In this invention, the aromatic organic liquid volatilization inhibitor also contains an antibacterial agent and / or a water-retaining agent.

[0060] To enhance the antibacterial effect of the aromatic organic liquid volatile inhibitor, the aromatic organic liquid volatile inhibitor may contain an antibacterial agent. In some embodiments, based on the total weight of the aromatic organic liquid volatile inhibitor, the content of the antibacterial agent may be 0-1% by weight, preferably 0.04-0.2% by weight. In a more preferred embodiment, the antibacterial agent may be at least one of a quaternary ammonium salt compound, an organohalide, a pyridine salt compound, and a broad-spectrum bactericide.

[0061] To reduce solvent loss, especially water evaporation, in the aromatic organic liquid volatile inhibitor, maintain its stability, and improve its long-term effect on the aromatic organic liquid, the aromatic organic liquid volatile inhibitor may contain a water-retaining agent. In some embodiments, the water-retaining agent is selected from at least one of n-hexadecyl alcohol, n-octadecyl alcohol, and n-butanol. In a more preferred embodiment, the thickness of the water-retaining agent above the surface of the aromatic organic liquid volatile inhibitor may be 3–4 mm.

[0062] The aromatic organic liquid volatile inhibitor provided by this invention not only has low density, but also possesses specific characteristics such as low volatility, low viscosity, good conductivity, good flame retardancy, good oleophobicity, and good stability. In some embodiments, the aromatic organic liquid volatile inhibitor has a volatility ≤3.2 kPa at 25°C, a viscosity <2000 cP, an electrical conductivity of 1200–1700 PS / m, and an absolute value of 20–40 mV for its Zeta potential.

[0063] The present invention also provides a method for preparing an aromatic organic liquid volatile inhibitor. In one embodiment, the method for preparing the aromatic organic liquid volatile inhibitor includes: mixing hollow microspheres, a surfactant, a stabilizer, a dispersant, a coupling agent, a solvent, an optional antibacterial agent, and an optional water-retaining agent.

[0064] To improve the stability of the prepared aromatic organic liquid volatile inhibitor, operations can be performed in a specific sequence. In a preferred embodiment, the method for preparing the aromatic organic liquid volatile inhibitor includes:

[0065] (1) Add surfactant, stabilizer, dispersant and coupling agent to solvent to obtain mother liquor;

[0066] (2) Add the hollow microspheres to the mother liquor;

[0067] (3) Optionally, an antibacterial agent may be added to the product obtained in step (2);

[0068] (4) Optionally, the water-retaining agent is sprayed above the liquid surface of the product obtained in step (3), and the hydrophilic groups of the water-retaining agent are partially dissolved and floated in the inhibitor, while its hydrophobic groups float on the surface of the inhibitor.

[0069] The density of the aromatic organic liquid volatilization inhibitor prepared according to the method of the present invention needs to be determined according to the aromatic organic liquid to be volatilized. If the volatilization of o-xylene is effectively inhibited, the density of the prepared aromatic organic liquid volatilization inhibitor is preferably 0.6 to 0.8 g / mL.

[0070] The aromatic organic liquid volatile inhibitor prepared by this invention can be used to inhibit the volatilization of aromatic organic liquids including benzene, toluene, o-xylene, styrene, and other aromatic organic liquids, as well as various intermediates such as mixed benzene. Applicable applications include fixed-roof tanks and internal floating-roof tanks (horizontal tanks, vertical tanks, underground tanks, and oil storage caverns). It can replace existing floating roofs and high-efficiency seals, or simply replace high-efficiency seals. During ship transportation, the aromatic organic liquid volatile inhibitor is placed above the level of the transported oil, preventing VOCs from evaporating even during rough seas. During oil tanker loading, the aromatic organic liquid volatile inhibitor floats above the oil, inhibiting the loading process and potentially eliminating the need for oil and gas recovery systems; the original air in the ship's hold can be directly released into the atmosphere without causing atmospheric pollution.

[0071] This invention also provides a method for suppressing the volatilization of aromatic organic liquids, the method comprising: conveying the aforementioned aromatic organic liquid volatilization inhibitor to the surface of the aromatic organic liquid. The aromatic organic liquid volatilization inhibitor and the method for suppressing the volatilization of aromatic organic liquids described in this invention can be used in fixed-roof tanks, in ship cabins, and in external floating roof tanks.

[0072] In the first embodiment, when used in a small fixed-roof storage tank, the aromatic organic liquid volatile inhibitor is first pumped into the fixed-roof storage tank. Then, the aromatic organic liquid is supplied to the fixed-roof storage tank via existing pipelines. Due to the buoyancy of the aromatic organic liquid, the volatile inhibitor naturally floats above the liquid surface, tightly adhering to the tank wall and completely covering the entire liquid surface, thus effectively inhibiting the volatilization of VOCs from the volatile organic liquid. As the oil level fluctuates due to feeding or discharging, the aromatic organic liquid volatile inhibitor moves with the aromatic organic liquid, maintaining a tight bond with the tank wall and liquid surface. Furthermore, the overall structure of the aromatic organic liquid volatile inhibitor is not damaged by the liquid level fluctuations, thus achieving the effect of inhibiting the volatilization of aromatic organic liquid.

[0073] In the second embodiment, when used inside the ship's hold, the aromatic organic liquid volatile inhibitor is first pumped into the hold, followed by the loading of the aromatic organic liquid. Due to the buoyancy of the aromatic organic liquid, the volatile inhibitor naturally floats above its surface, completely covering the entire surface and rising with the liquid level, effectively suppressing the volatilization of VOCs from the volatile aromatic organic liquid. During oil tanker transport, the liquid level of the aromatic organic liquid fluctuates with the waves, and the volatile inhibitor fluctuates accordingly, completely suppressing the volatilization of VOCs from the aromatic organic liquid.

[0074] In the third embodiment, in large external floating roof tanks, the external floating roof, primary seal, and skimmer structure can effectively prevent the volatilization of aromatic organic liquids. When the large external floating roof tank deforms or the elastic deformation of the primary seal is insufficient to maintain a fully sealed contact, VOCs will inevitably escape from the gaps. At this time, filling the space below the skimmer and above the primary seal with an aromatic organic liquid volatilization inhibitor allows the inhibitor to automatically fill the gaps when seal failure occurs, effectively solving the VOCs volatilization problem caused by seal failure. Figure 1 The red part is the filling area for aromatic organic liquid volatilization inhibitors.

[0075] The use of the aromatic organic liquid volatilization inhibitor and the method for inhibiting the volatilization of aromatic organic liquids described in this invention will produce at least the following beneficial effects:

[0076] On the one hand, the inhibitor in this invention can spread above the liquid surface, avoiding the formation of a gas phase space between the floating roof and the liquid surface, thus achieving intrinsic safety. Replacing the fully wetted floating roof and high-efficiency seal with an inhibitor can effectively solve the problem of local VOCs leakage caused by tank deformation and seal failure. At the same time, the inhibitor can cover the oil adhering to the wall, completely solving the VOCs leakage problem caused by oil adhering to the inner wall of the floating roof. VOCs leakage in internal floating roof tanks can be categorized into four types: wall adhering loss, seal loss, floating roof accessory loss, and floating roof gap loss. Among these, wall adhering loss has no effective solution due to the significant safety hazards of connecting tanks, making it impossible to implement; seal loss is caused by VOCs leakage in gaps due to tank deformation and seal failure, and the tank is difficult to restore after deformation, so there is currently no effective solution for this problem; floating roof accessory loss is also caused by unreliable and easily failed accessories, leading to VOCs leakage; floating roof gap loss is caused by loose bolt connections in the internal floating roof. In summary, three of the four types of VOCs leakage problems are difficult to solve. However, if the fully liquid-contact oleophobic aromatic organic liquid volatilization inhibitor of this invention is used, the following problems can be solved: wall adhesion loss (the oil cannot continue to adhere to the tank wall due to the presence of the oleophobic inhibitor material), gap loss (no gaps), floating roof accessories (no accessories), and sealing loss (the inhibitor is in full contact with the tank wall and the oil). The VOCs leakage can be reduced directly from 25% VOL to below 1000 ppm, effectively solving the problem of excessive VOCs emissions from internal floating roof tanks. Figure 2 A schematic diagram illustrating the use of aromatic organic liquid volatilization inhibitors in atmospheric pressure storage tanks such as fixed tanks and internal floating roof tanks.

[0077] Secondly, when used inside the cabin ( Figure 3Aromatic hydrocarbon volatile liquid inhibitors can naturally float above the liquid surface and completely cover it. During oil loading and unloading, these inhibitors rise with the oil level, effectively suppressing the volatilization of VOCs from volatile aromatic hydrocarbons. During tanker transportation, the oil level fluctuates with the waves, and the inhibitors fluctuate accordingly, completely suppressing the volatilization of VOCs from the oil.

[0078] The following examples further illustrate the aromatic organic liquid volatilization inhibitor and the method for inhibiting the volatilization of aromatic organic liquids according to the present invention. The examples are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following examples.

[0079] Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods in the art. Unless otherwise specified, the experimental materials used in the following embodiments are commercially available.

[0080] Surfactants that can be selected include Dow Chemical's OROTAN 731A (polyacrylate), Taiwan Chang Chun's BP 24S (polyvinyl alcohol); BASF's Polymin SN (polyethyleneimine), BASF's Lutensol TO-8 (fatty alcohol polyoxyethylene ether), Jufeng Chemical's M550 polyquaternium salt, Jufeng Chemical's sodium dodecylbenzene sulfonate, and Jiehong Chemical's sodium laurate.

[0081] Hydroxyethyl cellulose can be selected from Akzo's EBS451FQ or Shin-Etsu's HX6000YG4.

[0082] Hydroxypropyl cellulose can be sourced from Aslan's HF Pharm.

[0083] Hydroxypropyl methylcellulose can be selected from Aslan's E4M Pharm and E10M Pharm CR;

[0084] Dispersants that can be selected include Evonik's TEGO Dispers 755W (polyacrylic acid dispersant), BASF's DisepexAA 4040AS (polyacrylic acid dispersant), S.N.PCO's SN-THICKENER 5040A (polyacrylic acid dispersant), and BASF's Efka FA 4663AN (polyester polyamide dispersant).

[0085] Silane coupling agents that can be selected include Evonik's Dynasylan 4148 and Shin-Etsu's KF-8004;

[0086] Antibacterial agents that can be selected include Dow Chemical's AMBERLITE KATHON LXE (organohalide, the main component of which is 5-chloro-2-methyl-4-isothiazolidin-3-one) and Walker's VOK-SAN IT 532L (mixed type, broad-spectrum bactericide).

[0087] Hollow microspheres are made of soda lime borosilicate glass material. HL15 (median particle size D50 of 80 μm, true density of 0.15 g / mL, hollow internal structure) from Zhengzhou Shenglait Hollow Microsphere New Material Co., Ltd., or K20HS (true density of 0.2 g / mL, hollow internal structure) from 3M brand can be selected.

[0088] Example 1

[0089] The preparation process of inhibitors:

[0090] (1) Take 1500g of deionized water, and add 0.1g of Dow Chemical's OROTAN 731A (polyacrylate), 3g of Taiwan Changchun brand BP 24S (polyvinyl alcohol), 0.3g of Jufeng Chemical's polyquaternium salt M550, 4g of hydroxypropyl methylcellulose (Aslan's E4M Pharm), and 3g of hydroxyethyl cellulose (Akzo brand EBS451FQ). Heat in an 80℃ water bath and stir at 300r / min for 30min. Then, add 13g of Evonik's TEGO Dispers 755W (polyacrylic acid dispersant) and continue stirring for 100min. Finally, cool to room temperature to obtain a viscous liquid.

[0091] (2) Add 9g of silane coupling agent (Evonik's Dynasylan 4148) to the viscous liquid to reduce the viscosity of the solution and increase the stability of the solution to obtain the mother liquor.

[0092] (3) Weigh 125g of hollow microspheres (HL15 from Zhengzhou Shenglete Hollow Microsphere New Material Co., Ltd.) Figure 4 (This is a scanning electron microscope image of hollow microspheres). The microspheres were added to the mother liquor and premixed at 100 rpm at room temperature. Then, the mixture was stirred at 1800 rpm for 15 min to uniformly disperse the hollow microspheres into the mother liquor, thus obtaining the inhibitor.

[0093] (4) In order to further reduce the impact of microorganisms on the quality of the inhibitor, 1g of antibacterial agent (Dow Chemical's AmBERLITE KATHON LXE) was added to the inhibitor, and finally inhibitor 1 was obtained.

[0094] Analysis showed that inhibitor 1 had a density of 0.76 g / mL, lower than that of aromatic organic compounds such as o-xylene; its viscosity was 649 cP, and its absolute Zeta potential was 39.8 mV. Figure 5 It has an electrical conductivity of 1560 PS / m and exhibits good fluidity, conductivity, and stability.

[0095] Methods to suppress the volatilization of aromatic organic liquids:

[0096] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 1 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the thickness of the inhibitor is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 52ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 86ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 102ppm, indicating that the inhibitor is stable.

[0097] Example 2

[0098] The preparation process of inhibitors:

[0099] (1) Take 1500g of deionized water and add 0.1g of Dow Chemical's OROTAN 731A (polyacrylate), 2.3g of BASF's Lutensol TO-8 (fatty alcohol polyoxyethylene ether), 0.5g of BASF's Polymin SN (polyethyleneimine), 0.2g of Jiehong Chemical's sodium laurylate, 3g of hydroxypropyl cellulose (Aslan's HF Pharm), 2g of hydroxyethyl cellulose (Shin-Etsu Chemical's HX6000YG4), and 1g of hydroxypropyl methyl cellulose (Aslan's E4M Pharm). Heat in an 80℃ water bath and stir at 300r / min for 30min. Then, add 5g of BASF's Disepex AA 4040AS (polyacrylic acid dispersant) and 8g of Sanopco's SN-THICKENER 5040A (polyacrylic acid dispersant) and continue stirring for 100min. Finally, cool to room temperature to obtain a viscous liquid.

[0100] (2) Add 9g of silane coupling agent (Evonik's Dynasylan 4148) to the viscous liquid to reduce the viscosity of the solution and increase the stability of the solution to obtain the mother liquor.

[0101] (3) Weigh 125g of hollow microspheres (HL15 from Zhengzhou Shenglete Hollow Microsphere New Material Co., Ltd.) Figure 4 (This is a scanning electron microscope image of hollow microspheres). The microspheres were added to the mother liquor and premixed at 100 rpm at room temperature. Then, the mixture was stirred at 1800 rpm for 15 min to uniformly disperse the hollow microspheres into the mother liquor, thus obtaining the inhibitor.

[0102] (4) In order to further reduce the impact of microorganisms on the quality of the inhibitor, 1g of antibacterial agent (VOK-SAN IT 532L) was added to the inhibitor, and finally inhibitor 2 was obtained.

[0103] Analysis showed that inhibitor 2 had a density of 0.75 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; a viscosity of 614 cP; an absolute value of zeta potential of 36.1 mV; and a conductivity of 1812 PS / m, exhibiting good flowability, conductivity, and stability.

[0104] Methods to suppress the volatilization of aromatic organic liquids:

[0105] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 2 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 43ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 65ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 81ppm, indicating that the inhibitor is stable.

[0106] Example 3

[0107] The preparation process of inhibitors:

[0108] (1) Take 1500g of deionized water, and add 0.1g of Dow Chemical's OROTAN 731A (polyacrylate), 0.2g of Jufeng Chemical's sodium dodecylbenzenesulfonate, 2g of Taiwan Changchun brand BP 24S (polyvinyl alcohol), 0.5g of BASF's Lutensol TO-8 (fatty alcohol polyoxyethylene ether), 6g of hydroxypropyl methylcellulose (Aslan's E10M pharm CR), and 1g of hydroxypropyl cellulose (E10M pharm CR). Heat in an 80℃ water bath and stir at 300r / min for 30min. Then, add 3g of BASF's Efka FA 4663AN (polyester polyamide dispersant) and 4g of Sanopco's SN-THICKENER5040A (polyacrylic acid dispersant), and continue stirring for 100min. Finally, cool to room temperature to obtain a viscous liquid.

[0109] (2) Add 10g of silane coupling agent (Shin-Etsu KF-8004) to the viscous liquid to reduce the viscosity of the solution and increase the stability of the solution to obtain the mother liquor.

[0110] (3) Weigh 130g of hollow microspheres (HL15 from Zhengzhou Shenglait Hollow Microsphere New Material Co., Ltd.) Figure 4(This is a scanning electron microscope image of hollow microspheres). The microspheres were added to the mother liquor and premixed at 100 rpm at room temperature. Then, the mixture was stirred at 1800 rpm for 15 min to uniformly disperse the hollow microspheres into the mother liquor, thus obtaining the inhibitor.

[0111] (4) In order to further reduce the impact of microorganisms on the quality of the inhibitor, 1g of antibacterial agent (Dow Chemical's AMBERLITE KATHON LXE) was added to the inhibitor, and finally inhibitor 3 was obtained.

[0112] Analysis showed that inhibitor 3 had a density of 0.78 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; a viscosity of 812 cP; an absolute value of zeta potential of 34.7 mV; and a conductivity of 1421 PS / m, indicating good flowability, conductivity, and stability.

[0113] Methods to suppress the volatilization of aromatic organic liquids:

[0114] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour inhibitor 3 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 34ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 47ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 62ppm, indicating that the inhibitor is stable.

[0115] Example 4

[0116] The preparation process of inhibitors:

[0117] (1) Take 1500g of deionized water, and add 0.2g of Dow Chemical's OROTAN 731A (polyacrylate), 4g of Taiwan Changchun brand BP 24S (polyvinyl alcohol), 0.2g of Jiehong Chemical's sodium laurylate, 2g of hydroxyethyl cellulose (Akzo brand EBS451FQ), 2g of hydroxypropyl methyl cellulose (Aslan's E10M pharm CR), and 4g of hydroxyethyl cellulose (Akzo brand EBS451FQ) in sequence. Heat in an 80℃ water bath and stir at 300r / min for 30min. Then, add 10g of BASF's Efka FA 4663AN (polyester polyamide dispersant) and BASF's Disepex AA 4040AS (polyacrylic acid dispersant), and continue stirring for 100min. Finally, cool to room temperature to obtain a viscous liquid.

[0118] (2) Add 9g of silane coupling agent (Evonik's Dynasylan 4148) to the viscous liquid to reduce the viscosity of the solution and increase the stability of the solution to obtain the mother liquor.

[0119] (3) Weigh 145g of hollow microspheres (3M brand K20HS), add them to the mother liquor, and premix them at 100r / min at room temperature. Then stir at 1800r / min for 15min to evenly disperse the hollow microspheres into the mother liquor to obtain the inhibitor.

[0120] (4) In order to further reduce the impact of microorganisms on the quality of the inhibitor, 1g of antibacterial agent (Dow Chemical's AMBERLITE KATHON LXE) was added to the inhibitor, and finally inhibitor 4 was obtained.

[0121] Analysis showed that inhibitor 4 had a density of 0.78 g / mL, lower than that of aromatic organic compounds such as o-xylene; its viscosity was 891 cP, and its absolute Zeta potential was 38.4 mV. Figure 5 It has an electrical conductivity of 1721 PS / m and exhibits good fluidity, conductivity, and stability.

[0122] Methods to suppress the volatilization of aromatic organic liquids:

[0123] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 4 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 32ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 46ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 87ppm, indicating that the inhibitor is stable.

[0124] Example 5

[0125] The preparation process of inhibitors:

[0126] The method of Example 1 was implemented, except that the amount of hollow microspheres added in step (3) was adjusted to 145g, and finally inhibitor 5 was obtained.

[0127] Analysis showed that inhibitor 5 had a density of 0.68 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; a viscosity of 1462 cP; an absolute value of zeta potential of 34.2 mV; and a conductivity of 1458 PS / m, indicating good flowability, conductivity, and stability.

[0128] Methods to suppress the volatilization of aromatic organic liquids:

[0129] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 5 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 55ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 83ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 116ppm, indicating that the inhibitor is stable.

[0130] Example 6

[0131] The preparation process of inhibitors:

[0132] The method of Example 2 was implemented, except that the amount of BASF's lutensol TO-8 added in step (1) was adjusted to 3g, and the amount of hydroxypropyl methylcellulose added was adjusted to 3g, and finally inhibitor 6 was obtained.

[0133] Analysis showed that inhibitor 6 has a density of 0.67 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; its viscosity is 879 cP, its absolute Zeta potential is 37.2 mV, and its conductivity is 1470 PS / m, indicating that it has good flowability, conductivity, and stability.

[0134] Methods to suppress the volatilization of aromatic organic liquids:

[0135] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 6 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 68ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 89ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 101ppm, indicating that the inhibitor is stable.

[0136] Example 7

[0137] The preparation process of inhibitors:

[0138] The method of Example 3 was implemented, except that the amount of hollow glass microspheres added in step (3) was adjusted to 115g, and the inhibitor 7 was finally obtained.

[0139] Analysis showed that the density of inhibitor 7 was 0.80 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; its viscosity was 662 cP, its absolute Zeta potential was 37.2 mV, and its conductivity was 1521 PS / m, indicating that it has good flowability, conductivity and stability.

[0140] Methods to suppress the volatilization of aromatic organic liquids:

[0141] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). After it has completely spread on the o-xylene surface, measure and ensure the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 51ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 63ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 88ppm, indicating that the inhibitor is stable.

[0142] Example 8

[0143] The preparation process of inhibitors:

[0144] The method of Example 2 was implemented, except that the amount of hydroxypropyl methylcellulose added was adjusted to 4g, the amount of hydroxypropyl cellulose added was adjusted to 2g, and hydroxyethyl cellulose was no longer added, and finally inhibitor 8 was obtained.

[0145] Analysis showed that inhibitor 8 has a density of 0.72 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; its viscosity is 363 cP, its absolute Zeta potential is 33.8 mV, and its conductivity is 1639 PS / m, indicating that it has good flowability, conductivity, and stability.

[0146] Methods to suppress the volatilization of aromatic organic liquids:

[0147] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 8 onto the surface of the o-xylene liquid. After it has completely spread on the o-xylene surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 83ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 89ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 112ppm, indicating that the inhibitor is stable.

[0148] Example 9

[0149] The preparation process of inhibitors:

[0150] The method of Example 1 was implemented, except that the amount of BP 24S from Changchun, Taiwan, China, added in step (1) was adjusted to 5g, and the amount of hydroxyethyl cellulose added was adjusted to 5g, and finally inhibitor 9 was obtained.

[0151] Analysis showed that inhibitor 9 has a density of 0.74 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; a viscosity of 657 cP; an absolute value of zeta potential of 36.5 mV; and a conductivity of 1679 PS / m, exhibiting good flowability, conductivity, and stability.

[0152] Methods to suppress the volatilization of aromatic organic liquids:

[0153] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour inhibitor 9 onto the surface of the o-xylene liquid. After it has completely spread on the surface of the o-xylene, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 71ppm. After leaving the bottle covered for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 88ppm. After leaving the bottle covered for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 104ppm.

[0154] Example 10

[0155] The preparation process of inhibitors:

[0156] The method of Example 1 was implemented, except that the amount of silane coupling agent added in step (2) was adjusted to 15g, and finally inhibitor 10 was obtained.

[0157] Analysis showed that the density of inhibitor 10 was 0.75 g / mL, which is lower than that of aromatic organic compounds such as o-xylene; its viscosity was 469 cP, its absolute Zeta potential was 33.6 mV, and its conductivity was 1709 PS / m, indicating that it has good flowability, conductivity and stability.

[0158] Methods to suppress the volatilization of aromatic organic liquids:

[0159] Take a 500mL wide-mouth bottle and measure 200mL of o-xylene (density 0.88g / mL). Then pour Inhibitor 10 onto the surface of the o-xylene, and after it has completely spread on the surface, measure and ensure that the inhibitor thickness is approximately 2cm. After leaving the bottle open for 4 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 95ppm. After leaving the bottle capped for 24 hours, the VOCs concentration in the gas phase above the liquid surface is measured to be 106ppm. After leaving the bottle capped for one week, the contact surface between the inhibitor and o-xylene is clear, and the VOCs concentration in the gas phase is 122ppm, indicating that the inhibitor is stable.

[0160] Comparative Example 1

[0161] The preparation process of inhibitors:

[0162] The method of Example 1 was implemented, except that the amount of hollow microspheres added in step (3) was adjusted to 50g, the amount of BP 24S from Changchun, Taiwan, China added in step (1) was adjusted to 10g, and no silane coupling agent was added in step (2) (i.e. step (2) was not performed), and finally inhibitor 11 was obtained.

[0163] Analysis showed that inhibitor 11 had a density of 0.91 g / mL, which is relatively high; and a viscosity of 621 cP, which indicates good flowability.

[0164] Methods to suppress the volatilization of aromatic organic liquids:

[0165] Take a 500mL wide-mouth bottle, measure 200mL of o-xylene, and then pour Inhibitor 11 above the o-xylene liquid surface. The inhibitor sinks below the o-xylene liquid surface. This inhibitor has no effect.

[0166] Comparative Example 2

[0167] The method of Example 1 was implemented, except that hollow microspheres were not added.

[0168] The preparation process of inhibitors:

[0169] (1) Take 1500g of deionized water, and add 0.1g of Dow Chemical's OROTAN 731A, 3g of Taiwan Changchun brand BP 24S, 0.3g of Jufeng Chemical's polyquaternium salt M550, 4g of hydroxypropyl methylcellulose (Aslan's E4M Pharm), and 3g of hydroxyethyl cellulose (Akzo brand EBS451FQ) in sequence. Heat in an 80℃ water bath and stir at 300r / min for 30min. Then, add 13g of Evonik's TEGO Dispers 755W and continue stirring for 100min. Finally, cool to room temperature to obtain a viscous liquid.

[0170] (2) Add 9g of silane coupling agent (Evonik's Dynasylan 4148) to the viscous liquid to reduce the viscosity of the solution and increase the stability of the solution to obtain the mother liquor.

[0171] (3) In order to further reduce the impact of microorganisms on the quality of the inhibitor, 1g of antibacterial agent (Dow Chemical's AmBERLITE KATHON LXE) was added to the inhibitor, and finally inhibitor 12 was obtained.

[0172] Analysis revealed that the density of inhibitor 12 was 0.98 g / mL, which was too high to be usable.

[0173] Methods to suppress the volatilization of aromatic organic liquids:

[0174] Take a 500mL wide-mouth bottle, measure 200mL of o-xylene, and then pour Inhibitor 12 onto the surface of the o-xylene liquid. Inhibitor 12 sinks to the bottom of the o-xylene and cannot float on the surface of the gasoline, so it has no effect on inhibiting gasoline evaporation.

[0175] Comparative Example 3

[0176] Take 1500g of deionized water and weigh 125g of hollow microspheres (HL15 from Zhengzhou Shenglait Hollow Microsphere New Material Co., Ltd.). Premix the two at 100r / min at room temperature, and then stir at 1800r / min for 15min to disperse the hollow microspheres into the deionized water to obtain inhibitor 13.

[0177] After 10 minutes of storage, the inhibitor 13 showed solid-liquid separation, indicating that it was unstable and could not effectively inhibit the volatilization of oil.

[0178] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An aromatic hydrocarbon-based volatile liquid evaporation inhibitor, characterized in that, This aromatic organic liquid volatilization inhibitor contains hollow microspheres, surfactants, stabilizers, dispersants, coupling agents, and solvents, and is used to inhibit the volatilization of aromatic organic liquids. Wherein, the density of the aromatic organic liquid volatilization inhibitor is less than the density of the aromatic organic liquid, and the density of the aromatic organic liquid volatilization inhibitor is 0.65-0.8 g / mL.

2. The aromatic organic liquid volatilization inhibitor according to claim 1, characterized in that, The solvent is water.

3. The aromatic organic liquid volatilization inhibitor according to claim 1 or 2, characterized in that, The aromatic organic liquid is at least one of benzene, toluene, o-xylene and styrene; Preferably, the density of the aromatic organic liquid is 0.82 to 0.95 g / mL.

4. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-3, characterized in that, The content of hollow microspheres is 3 to 15 parts by weight, preferably 6 to 10 parts by weight, relative to 100 parts by weight of the solvent. Preferably, the density of the hollow microspheres is 0.05–0.6 g / mL, more preferably 0.1–0.3 g / mL; Preferably, the median particle size D50 of the hollow microspheres is 5–500 μm, and more preferably 10–100 μm; Preferably, the hollow microspheres are made of soda lime borosilicate glass.

5. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-4, characterized in that, The content of the surfactant is 0.01 to 6 parts by weight, preferably 0.03 to 2 parts by weight, relative to 100 parts by weight of the solvent. Preferably, the surfactant is a small molecule water-soluble surfactant with a molecular weight of 300 to 1000 and / or a high molecular weight water-soluble surfactant with a molecular weight of 8000 to 30000. More preferably, the small molecule water-soluble surfactant is selected from at least one of sodium oleate, sodium laurylate, sodium stearate, sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, octadecylamine, cocoylamine, and dodecylamine; More preferably, the high molecular weight water-soluble surfactant is selected from at least one of polyacrylate and its derivatives, polyethyleneimine, polyvinylpyrrolidone, polyacrylamide and its derivatives, polyvinyl alcohol, polyoxyethylene polyoxypropylene ether, polyvinyl ether, polyquaternary ammonium salt and fatty alcohol polyoxyethylene ether.

6. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-5, characterized in that, Based on the weight of the solvent, the content of the stabilizer is 0.05 to 2 parts by weight, preferably 0.2 to 1 part by weight; Preferably, the stabilizer is selected from cellulose compounds and / or starch; More preferably, the cellulose compound is selected from at least one of methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylcellulose, and hydroxypropylmethylcellulose.

7. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-6, characterized in that, The content of the dispersant is 0.1 to 6 parts by weight, preferably 0.5 to 3 parts by weight, relative to 100 parts by weight of the solvent. Preferably, the dispersant is a cationic dispersant and / or a polymeric dispersant; More preferably, the cationic dispersant is selected from at least one of amine salts, quaternary ammonium salts, and pyridinium salts; More preferably, the polymeric dispersant is selected from at least one of polycaprolactone polyol-polyethyleneimine block copolymer dispersants, polyacrylic acid polymeric dispersants, polyurethane and polyester polyamide dispersants.

8. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-7, characterized in that, The content of the coupling agent relative to 100 parts by weight of the solvent is 0.05 to 8 parts by weight, preferably 0.2 to 4 parts by weight; Preferably, the coupling agent is selected from at least one of silane coupling agents, titanate coupling agents, aluminate coupling agents, zirconate coupling agents, and organic complexes.

9. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-8, characterized in that, The organic liquid evaporation inhibitor also contains antibacterial agents and / or water-retaining agents.

10. The aromatic organic liquid volatilization inhibitor according to claim 9, characterized in that, Based on the total weight of the organic liquid volatile inhibitor, the content of the antibacterial agent is 0-1% by weight, preferably 0.04-0.2% by weight; Preferably, the antibacterial agent is at least one selected from quaternary ammonium salt compounds, organohalides, pyridine salt compounds, and broad-spectrum bactericides.

11. The aromatic organic liquid volatilization inhibitor according to claim 9 or 10, characterized in that, The water-retaining agent is selected from at least one of n-hexadecyl alcohol, n-octadecanol and n-butanol; Preferably, the thickness of the water-retaining agent above the surface of the organic liquid evaporation inhibitor is 3-4 mm.

12. The aromatic organic liquid volatilization inhibitor according to any one of claims 1-11, characterized in that, The viscosity of the organic liquid volatile inhibitor is <2000 cP, the conductivity is 1200-1700 PS / m, and the absolute value of the Zeta potential is 20-40 mV.

13. A method for suppressing the volatilization of aromatic organic liquids, characterized in that, The method includes: delivering the aromatic organic liquid volatilization inhibitor according to any one of claims 1-12 above the surface of the aromatic organic liquid.

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