Production method of petroleum-based furnace carbon black, carbon black produced by adopting method and application of carbon black

Abstract

The invention discloses a production method of petroleum-based furnace carbon black, the carbon black produced by the method and application of the carbon black. The production method comprises the following steps: reacting fuel with an oxidizing agent to generate combustion gas flow; raw materials are introduced into the reaction furnace to be mixed with high-temperature combustion airflow; after the raw material is introduced into the reaction furnace and before the cooling water is injected, introducing a titanium-containing material flow at a position which is' L 'away from the downstream of the raw material introduction point; the raw materials, the titanium-containing material flow and the combustion gas flow react in a reaction zone to generate the titanium-treated carbon black, then the carbon black is cooled, separated and recycled, and the titanium-treated carbon black obtained by the method shows better shading property and light stability when being applied to the fields of printing ink, paint, coating, plastics and the like, and shows better dispersity in water-based color paste at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of furnace carbon black production, in particular to a method for producing petroleum-based furnace carbon black, the carbon black produced by the method and applications thereof. Background Art

[0002] With the increasing use of umbrellas, outdoor tents, and military outdoor fabrics, the market demand for light-blocking coatings is growing. Carbon black, a key coloring and light-blocking pigment, has been widely used in light-blocking coatings. However, when carbon black is used alone as a light-blocking component in a coating, its light-blocking effect is limited. Research has shown that when carbon black and titanium dioxide work together, they can complement each other and enhance the overall performance of the pigment. For example, in coatings, carbon black can impart a strong black color, while titanium dioxide can enhance hiding power and weather resistance. The combination of these two can enhance the appearance and performance of the coating.

[0003] The carbon black materials provided by related technologies can provide light-shielding properties after surface modification by adding a high content of titanium dioxide. For example, patent application number CN201610787562.4 describes a composite cable material with carbon black and titanium dioxide for improved light stability. The material is prepared from the following raw materials in parts by weight: 60-65 parts of thermoplastic polyurethane elastomer, 35-40 parts of polyvinyl chloride, 0.1-0.12 parts of stearic acid, 5-6 parts of calcium benzoate, 0.8-1 parts of methyl tin mercaptan heat stabilizer, 0.2-0.3 parts of titanate coupling agent 131, 19-20 parts of epoxy soybean oil, 2-3 parts of polyethylene wax, 2-3 parts of carbon black, 5-6 parts of nano-titanium dioxide, 0.8-1 parts of benzotriazole, 1.5-2 parts of octadecyl acrylate, an appropriate amount of anhydrous ethanol, and 0.9-1 parts of silane coupling agent KH550. The advantages described in the patent include that by compounding carbon black with nano-titanium dioxide, it has a good light shielding effect, which can prevent light from entering the interior of the polymer and play a role in protecting the polymer. However, the composite rate of carbon black and nano-titanium dioxide cannot be guaranteed, and there is still a problem of insufficient light shielding. At the same time, the scale effect of nano-titanium dioxide is not obvious, and the amortized cost per unit product is high, resulting in increased material costs. For example, the patent with application number CN201911411279.1 discloses a light-shielding coating for textile fabrics, which is made of 60-80 parts of textile emulsion, 2-4 parts of organic amine, 6-12 parts of carbon black, 1-3 parts of acrylate, 1-2 parts of fumed silica, 3-6 parts of urea, 6-13 parts of titanium dioxide, 3-7 parts of castor oil polyoxyethylene ether, 6-10 parts of toluene, 0.2-0.5 parts of dispersant, 0.2-0.5 parts of catalyst, and 0.2-0.5 parts of thickener. This patent combines carbon black with titanium dioxide, leveraging titanium dioxide's superior absorption of ultraviolet light and its excellent reflection of visible and ultraviolet light to impart enhanced light-blocking properties to the coating. However, this approach presents several challenges: titanium dioxide's high photocatalytic activity, after absorbing ultraviolet light, can easily catalyze the degradation of the polymer matrix in the coating. This can lead to coating damage over time, shedding of carbon black and titanium dioxide, and a reduction in light-blocking performance.

[0004] In summary, in response to the existing problems, this application aims to develop a method for producing carbon black using a petroleum-based titanium treatment furnace method, which can produce carbon black products containing titanium dioxide on the surface online. The method is simple, easy to operate and industrially produced. Summary of the Invention

[0005] The present invention provides a method for producing petroleum-based furnace carbon black, the carbon black produced by this method, and its applications. The production process comprises: a fuel and an oxidant react to generate a combustion gas stream; a feedstock is introduced into a reactor and mixed with the high-temperature combustion gas stream; after the feedstock is introduced into the reactor and before cooling water is added, a titanium-containing stream is introduced at a distance "L" downstream of the feedstock introduction point. The feedstock, the titanium-containing stream, and the combustion gas stream react in a reaction zone to generate titanium-treated carbon black, which is then cooled, separated, and recovered. The carbon black produced by this method exhibits excellent light-blocking and light-stability properties and can be used in inks, paints, coatings, plastics, and other fields.

[0006] To achieve the above objectives, the present application discloses a method for producing petroleum-based furnace carbon black, comprising the following steps:

[0007] S1: Forming high-temperature airflow: heating the fuel oil to a set temperature in the fuel oil heater, then spraying it into the combustion chamber of the reactor through the fuel oil gun, mixing with the preheated air in the combustion chamber, and fully burning to generate a high-temperature combustion airflow;

[0008] S2: Feedstock oil injection: After filtering, the feedstock oil is pumped to the feedstock oil preheater and preheated to the set temperature. It is then sprayed into the reaction chamber of the reactor through a feedstock oil gun. The preheated feedstock oil mixes with the high-temperature combustion airflow entering the reaction chamber at high speed, causing the feedstock oil to rapidly vaporize and crack to produce carbon black.

[0009] S3: Injection of titanium-containing material: After the raw oil is injected, the titanium-containing material is injected at the injection point of the titanium-containing material. The carbon-containing material is mixed with the carbon black, raw oil and high-temperature combustion airflow in the previous step to form titanium-treated carbon black;

[0010] S4: Termination of reaction: The high-temperature airflow containing titanium-treated carbon black flows into the rear collection section of the reactor, and quenching water is sprayed directly into the high-temperature airflow through a nozzle to rapidly cool the high-temperature airflow to terminate the carbon black reaction;

[0011] S5: Collection: The cooled air flow is processed by a cyclone separator and a bag filter to separate the titanium-treated carbon black and waste gas.

[0012] Among them, the reaction chamber includes a throat contraction section, a throat straight section and a throat expansion section connected in sequence, the diameter of the throat straight section is D, the raw oil injection point and the titanium-containing material injection point are located on the same horizontal line and the straight-line distance is L, and the L / D ratio range is 0≤L / D<1.

[0013] According to an embodiment of the present application, in step S1, the combustion oil is ethylene tar, and the ethylene tar is heated to 120° C. in a fuel oil heater.

[0014] According to an embodiment of the present application, the preheated air in the combustion chamber is pressurized by the main air supply fan and then enters the air preheater to be preheated to about 850°C before entering the combustion chamber.

[0015] According to an embodiment of the present application, in step S2, the crude oil is preheated to 220°C in a crude oil preheater.

[0016] According to an embodiment of the present application, a quench cooler is provided in the converging section at the rear of the reactor, and the quench cooler sprays quenching water through a nozzle to cool down and terminate the reaction.

[0017] According to an embodiment of the present application, the feedstock oil is ethylene tar, clarified oil, or a mixture of the two.

[0018] According to an embodiment of the present application, the titanium-containing substance is a mixture of one or more of titanium dioxide solid, titanium dioxide solution, titanate and titanium compound.

[0019] According to the embodiments of the present application, based on 100 parts by weight of the total weight of the titanium-treated carbon black, the amount of the titanium-containing substance introduced is 0.1-30 parts by weight.

[0020] On the other hand, the present application discloses a carbon black produced by the furnace carbon black production method as described above, wherein the titanium content in the carbon black is 0.1%-23%.

[0021] Another aspect of the present application discloses an application of carbon black in light-shielding fabrics and color pastes.

[0022] The beneficial effects of the technical solution of the present invention compared with the prior art are:

[0023] 1. The present invention uses ultra-high temperature cracking of vaporous raw oil to accelerate the chemical reaction rate of carbon black, improve the reaction yield, and reduce energy consumption. After adding the raw oil, a titanium-containing substance is added to change the reaction process and trigger a new chemical reaction. Titanium treatment is completed during the surface reaction of the carbon black, thereby increasing the surface roughness of the carbon black and reducing the bonding force of the aggregates formed, thereby obtaining a carbon black product with good light-shielding properties.

[0024] 2. Carbon black products that have undergone titanium treatment on the surface of carbon black have better light-shielding and light-stability properties when used in inks, paints, coatings, plastics and other fields, and also have better dispersibility in water-based color pastes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a process flow chart of a method for producing petroleum-based furnace carbon black. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] See Figure 1 FIG. 1 shows a whole process flow of a method for producing petroleum-based furnace carbon black, comprising the following steps:

[0028] S1: Forming high-temperature airflow: heating the fuel oil to a set temperature in the fuel oil heater, then spraying it into the combustion chamber of the reactor through the fuel oil gun, mixing with the preheated air in the combustion chamber, and fully burning to generate a high-temperature combustion airflow;

[0029] Specifically, in step S1, the fuel oil is ethylene tar or a similar oil. Light oil can also be used as the combustion oil. The lower calorific value of the fuel oil is greater than 8000 kcal / kg, preferably greater than 9000 kcal / kg. The combustion oil is heated to approximately 120°C in a fuel oil heater and then injected into the reactor through a fuel oil gun. It mixes with preheated air in the combustion chamber and burns thoroughly.

[0030] Specifically, in step S1, the preheated air in the combustion chamber is pressurized by the main air supply fan and then enters the air preheater to be preheated to 850°C before entering the combustion chamber.

[0031] Specifically, the bottom of the reactor's combustion chamber is layered with a refractory layer and a thermal insulation layer, sequentially from top to bottom. The upstream portion of the combustion chamber is expanded to facilitate combustion and the combustion process, while the downstream portion is contracted to minimize temperature and pressure drops and accommodate the contraction section of the reactor's throat.

[0032] S2: Feedstock oil injection: After filtering, the feedstock oil is pumped to the feedstock oil preheater and preheated to the set temperature. It is then sprayed into the reaction chamber of the reactor through a feedstock oil gun. The preheated feedstock oil mixes with the high-temperature combustion airflow entering the reaction chamber at high speed, causing the feedstock oil to rapidly vaporize and crack to produce carbon black.

[0033] Specifically, the reaction chamber consists of a sequentially connected throat constriction section, a straight throat section, and a diverging throat section, all of which are flange-connected. The initial end of the throat constriction section is flange-connected to the burner, allowing for sampling or injecting crude oil. The straight throat section features a crude oil injection point, which can accommodate one to six crude oil nozzles. The diverging throat section helps reduce eddy currents caused by entrainment of airflow through the throat.

[0034] Specifically, the feedstock oil is either ethylene tar, clarified oil, or a mixture of the two. The feedstock oil should have a carbon content greater than 80%, minimal impurities, and a relevant index of no less than 110.

[0035] Specifically, in step S2, the crude oil is preheated to about 220°C in a crude oil preheater and then sprayed into the reaction furnace through a crude oil gun.

[0036] S3: Injection of titanium-containing material: After the raw oil is injected, the titanium-containing material is injected at the injection point of the titanium-containing material. The carbon-containing material is mixed with the carbon black, raw oil and high-temperature combustion airflow in the previous step to form titanium-treated carbon black;

[0037] S4: Termination of reaction: The high-temperature airflow containing titanium-treated carbon black flows into the rear collection section of the reactor, and quenching water is sprayed directly into the high-temperature airflow through a nozzle to rapidly cool the high-temperature airflow to terminate the carbon black reaction;

[0038] Specifically, a quencher is provided in the converging section at the rear of the reactor, and the quencher sprays quenching water through a nozzle to cool down and terminate the reaction.

[0039] Specifically, the titanium-containing substance is a mixture of one or more of titanium dioxide solid, titanium dioxide solution, titanate, and titanium compound. The titanium-containing substance is introduced in an amount of 0.1-30 parts by weight per 100 parts by weight of the total weight of the titanium-treated carbon black. Preferably, the titanium content per 100 parts by weight of the titanium-treated carbon black is 3-20 parts by weight.

[0040] S5: Collection: The cooled air flow is processed by a cyclone separator and a bag filter to separate the titanium-treated carbon black and waste gas.

[0041] Among them, the diameter of the straight section of the throat is D, the raw oil injection point and the titanium-containing material injection point are located on the same horizontal line and the straight-line distance is L, and the L / D ratio range is 0≤L / D<1.

[0042] Another aspect of the present application discloses a carbon black produced by the above furnace carbon black production method, characterized in that the titanium content in the carbon black is 0.1%-23%.

[0043] Another aspect of the present application discloses an application of carbon black in light-shielding fabrics and color pastes.

[0044] Example 1

[0045] A carbon black is prepared by the following steps:

[0046] Ethylene tar is heated to about 120°C by a fuel oil heater and then sprayed into the reactor through a fuel oil gun. It is mixed with the preheated air in the combustion chamber and fully burned. The high-temperature combustion airflow formed then enters the reaction section of the reactor at high speed to provide energy for the carbon black formation reaction. The fuel oil flow rate is 1000 kg / h, the fuel oil pressure is 0.475 MPa, the air flow rate into the furnace is 19860 Nm3 / h, the air temperature into the furnace is 832°C, and the air pressure into the furnace is 40.9 KPa. After ethylene tar enters the raw oil tank as raw oil, it passes through the raw oil filter and is sent to the raw oil preheater by the raw oil pump for preheating. It is then sprayed into the reactor through a raw oil gun. Here, ethylene tar contacts and mixes with the high-temperature and high-speed combustion airflow from the combustion section. The raw oil is rapidly vaporized and cracked to form carbon black. The raw oil pressure into the furnace is 2.84 MPa, the raw oil flow into the furnace is 8840 kg / h, and the preheating temperature of the raw oil is 196.6℃; after the raw oil is injected, a titanium dioxide solid flow is injected at the raw oil injection point, wherein the rate of titanium-containing substances is 810 kg / h, and at this time L / D=0; at the rear part of the reactor, quenching water is sprayed directly into the high-temperature air flow containing carbon black through a nozzle to rapidly cool it to terminate the carbon black reaction, wherein the quenching water flow rate is 7211 kg / h, and the primary quenching flue gas temperature is 930℃, and the carbon black is subsequently separated and recovered.

[0047] In this embodiment, the structural inhibitor is a potassium carbonate solution (concentration is 2 wt%), the potassium carbonate flow rate is 12 kg / h, and the indicators of the ethylene tar used are shown in Table 1:

[0048] Table 1

[0049]

[0050] Example 2

[0051] A carbon black is prepared by the following steps:

[0052] The ethylene tar is heated to about 120°C by a fuel oil heater and then sprayed into the reactor through a fuel oil gun. It is mixed with the preheated air in the combustion chamber and fully burned. The high-temperature combustion airflow formed then enters the reaction section of the reactor at high speed to provide energy for the carbon black formation reaction. The fuel oil flow rate is 1000 kg / h, the fuel oil pressure is 0.475 MPa, the air flow rate into the furnace is 19860 Nm3 / h, the air temperature into the furnace is 832°C, and the air pressure into the furnace is 40.9 KPa; the mixed oil of catalytic cracking slurry and ethylene tar enters the raw oil tank as the raw oil, passes through the raw oil filter, and is sent to the raw oil preheater by the raw oil pump for preheating, and then is sprayed into the reactor through the raw oil gun. Here, the mixed oil of catalytic cracking slurry and ethylene tar contacts and mixes with the high-temperature and high-speed combustion airflow from the combustion section, and the raw oil is rapidly vaporized and cracked to form carbon black. The raw oil pressure into the furnace is 2.84 MPa, the raw oil flow rate into the furnace is 8840 kg / h, and the preheating temperature of the raw oil is 196.6℃; after the raw oil is injected, a titanium dioxide solid flow is injected downstream of the raw oil injection point, wherein the rate of titanium-containing substances is 3516kg / h, and at this time L / D=0.3; at the rear of the reactor, quenching water is directly sprayed into the high-temperature air flow containing carbon black through a nozzle to rapidly cool it to terminate the carbon black reaction, wherein the quenching water flow rate is 7211 kg / h, and the primary quenching flue gas temperature is 930℃, and the carbon black is subsequently separated and recovered.

[0053] In this embodiment, the structural inhibitor is a potassium carbonate solution (concentration is 2 wt%), the potassium carbonate flow rate is 12 kg / h, and the combustion oil and feed oil indicators used are shown in Table 2:

[0054] Table 2

[0055]

[0056] Comparative Example 1

[0057] The only difference between this comparative example and Example 1 is that in this comparative example, no titanium-containing substance is added.

[0058] Comparative Example 2

[0059] The only difference between this comparative example and Example 2 is that the distance "L" between the position where the titanium-containing substance is added and the position where the raw oil is added is greater than D, and L / D=2.

[0060] The carbon black obtained in the above examples and comparative examples was tested for performance indicators. The properties of the carbon black were characterized as follows: iodine absorption value: tested with reference to the method described in GB / T 380.1-2015; DBP (dibutyl phthalate) absorption value: tested with reference to the method described in GB / T 380.2-2017; specific surface area: tested with reference to the method described in GB / T 10722-2014; titanium content in carbon black: the weight percentage of titanium in the treated carbon black can be determined by an ashing test performed according to ASTM specification D-1506.

[0061] The properties of the carbon black obtained in each embodiment are shown in Table 3.

[0062] Table 3

[0063]

[0064] Example 3 Application of the carbon black prepared in Example 1 and Comparative Example 1 in color paste

[0065] 1. Prepare neutral color paste using the carbon black obtained in Example 1:

[0066] The color paste was prepared according to the following steps: by weight, 2 parts by weight of dispersant Y74, 15 parts by weight of carbon black from Example 1, and the remainder of deionized water were added to a beaker and stirred evenly with a glass, the pH was adjusted to 8.5 with triethanolamine, the mixed liquid was emulsified with a high-speed shear emulsifier for 15 minutes, the mixture was transferred to a sand mill for grinding, 75% of the grinding cavity was filled with zirconium oxide beads, and the carbon black slurry was obtained after grinding at a speed of 2500 r / min for 1 hour.

[0067] Particle size testing: Using a Topsizer laser particle size analyzer, test parameters were refractive index = 1.739, absorbance = 1.0. After diluting and stirring the color paste, add it to the particle size analyzer inlet. When the opacity reached between 7-8, observe and calculate the microscopic and cumulative distribution of the ink particle size. The particle size range (D90) within which 90% of the particles in the slurry fall is used to represent the color paste particle size.

[0068] Centrifugal stability test: Refer to the literature and use a UV-visible spectrophotometer. Dilute the prepared carbon black slurry 2000-fold and allow to stand. Place the slurry in a cuvette and adjust the UV-visible spectrophotometer to a wavelength of 510 nm. Measure the absorbance of the slurry, which is recorded as A. Pour the slurry into a centrifuge tube and centrifuge it in a high-speed centrifuge at 10,000 rpm for 1 hour. Measure the absorbance of the supernatant using a spectrophotometer, which is recorded as B. The specific absorbance, r, can be calculated using the following formula:

[0069] r=A / B×100%.

[0070] 2. Use the carbon black obtained in Comparative Example 1 to prepare a neutral color paste:

[0071] The color paste was prepared according to the following steps: by weight, 2 parts by weight of dispersant Y74, 15 parts by weight of carbon black from comparative example 1, and the remainder of deionized water were added to a beaker and stirred evenly with a glass, the pH was adjusted to 8.5 with triethanolamine, the mixed liquid was emulsified with a high-speed shear emulsifier for 15 minutes, the mixture was transferred to a sand mill for grinding, 75% of the grinding cavity was filled with zirconium oxide beads, and the carbon black slurry was obtained after grinding at a speed of 2500 r / min for 1 hour.

[0072] Particle size testing: Using a Topsizer laser particle size analyzer, test parameters were refractive index = 1.739, absorbance = 1.0. After diluting and stirring the color paste, add it to the particle size analyzer inlet. When the opacity reached between 7-8, observe and calculate the microscopic and cumulative distribution of the ink particle size. The particle size range (D90) within which 90% of the particles in the slurry fall is used to represent the color paste particle size.

[0073] Centrifugal stability test: Refer to the literature and use a UV-visible spectrophotometer. Dilute the prepared carbon black slurry 2000-fold and allow to stand. Place the slurry in a cuvette and adjust the UV-visible spectrophotometer to a wavelength of 510 nm. Measure the absorbance of the slurry, which is recorded as A. Pour the slurry into a centrifuge tube and centrifuge it in a high-speed centrifuge at 10,000 rpm for 1 hour. Measure the absorbance of the supernatant using a spectrophotometer, which is recorded as B. The specific absorbance, r, can be calculated using the following formula:

[0074] r=A / B×100%.

[0075] The closer the specific absorbance is to 1, the better the stability of the color paste.

[0076] The experimental results are as follows:

[0077] Table 4

[0078]

[0079] Experimental results show that the water-based colorant prepared from the titanium-treated carbon black obtained in Example 1 has a smaller particle size and better stability. Comparing the carbon blacks obtained in Example 1 with those obtained in Comparative Example 1, their iodine absorption value, specific surface area, DBP absorption value, and other indicators are similar. The reason for the better stability of the carbon black obtained in Example 1 in the water-based colorant is mainly due to the presence of titanium dioxide on the carbon black surface, which enhances the hydrophilicity of the carbon black and thus improves its dispersion performance in aqueous solution.

[0080] Example 4 Application of the carbon black prepared in Example 2 and Comparative Example 2 in color paste

[0081] Neutral color pastes were prepared using the carbon black obtained in Example 2 and the carbon black obtained in Comparative Example 2, respectively. The preparation and characterization methods were the same as in Example 3. The test results are shown in Table 5.

[0082] Table 5

[0083]

[0084] Experimental results show that the water-based color paste prepared from the titanium-treated carbon black obtained in Example 2 has a smaller particle size and better stability. A comparison of the carbon black obtained in Example 2 and Comparative Example 2 reveals similarities in iodine adsorption value, specific surface area, and DBP absorption value. The main difference between the two is that the titanium-containing stream in Comparative Example 2 is added later, preventing the titanium treatment from completing on the carbon black surface. This results in a lower titanium content on the carbon black surface, and thus fails to achieve the beneficial effects of the carbon black obtained in Example 2.

[0085] Example 5 Application of the carbon black prepared in Example 1 and Comparative Example 1 in light-shielding fabrics

[0086] The carbon black obtained in Example 1 was used to prepare light-shielding fabric:

[0087] The following raw materials were weighed in parts by weight: 20 parts of carbon black obtained in Example 1, 10 parts of polyether polyol polyurethane resin, 5 parts of fumed silica, 1 part of isocyanate curing agent, 4 parts of propylene glycol block polyether, 40 parts of N,N-dimethylformamide, and 20 parts of xylene.

[0088] Weighed carbon black was mixed evenly with fumed silica, N,N-dimethylformamide, and xylene. Propylene glycol block polyether and polyether polyol polyurethane resin were added. After soaking for 10 hours, the mixture was stirred in a high-speed blender at 1400 rpm for 1 hour to obtain a premixed slurry. Isocyanate curing agent was added to the premixed slurry and stirred evenly to obtain a carbon black slurry. The carbon black slurry was applied to the surface of a polyester woven fabric and dried to obtain a light-blocking fabric.

[0089] 2. Using the carbon black obtained in Comparative Example 1 to prepare light-shielding fabric:

[0090] The following raw materials were weighed in parts by weight: 20 parts of the carbon black obtained in Comparative Example 1, 10 parts of a polyether polyol polyurethane resin, 5 parts of fumed silica, 1 part of an isocyanate curing agent, 4 parts of propylene glycol block polyether, 40 parts of N,N-dimethylformamide, and 20 parts of xylene.

[0091] Weighed carbon black was mixed evenly with fumed silica, N,N-dimethylformamide, and xylene. Propylene glycol block polyether and polyether polyol polyurethane resin were added. After soaking for 10 hours, the mixture was stirred in a high-speed blender at 1400 rpm for 1 hour to obtain a premixed slurry. Isocyanate curing agent was added to the premixed slurry and stirred evenly to obtain a carbon black slurry. The carbon black slurry was applied to the surface of a polyester woven fabric and dried to obtain a light-blocking fabric.

[0092] Light-shielding performance test: Tested according to the method described in GB / T 18830-2009 standard and expressed as UPF (Ultraviolet Protection Factor).

[0093] Table 6

[0094]

[0095] From the test results of the shading performance, it can be seen that the shading fabric prepared with titanium-treated carbon black has better shading performance than the shading fabric prepared with untreated carbon black.

[0096] In summary, the technical solution of this application has the following beneficial effects:

[0097] The present invention uses ultra-high temperature to crack vaporous raw oil to accelerate the chemical reaction speed of carbon black, improve the reaction yield, and reduce energy consumption. Titanium-containing substances are added after adding the raw oil to change the reaction process and trigger a new chemical reaction. Titanium treatment is completed during the surface reaction of the carbon black, thereby increasing the surface roughness of the carbon black and reducing the bonding force of the aggregates formed, thereby obtaining a carbon black product with good light-shielding properties.

[0098] 2. Carbon black products that have undergone titanium treatment on the carbon black surface have better light-shielding and light-stability properties when used in inks, paints, coatings, plastics and other fields, and also exhibit better dispersibility in water-based color pastes.

[0099] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for producing petroleum-based furnace carbon black, characterized in that: The following steps are involved: S1: Forming high-temperature airflow: heating the fuel oil to a set temperature in the fuel oil heater, then spraying it into the combustion chamber of the reactor through the fuel oil gun, mixing with the preheated air in the combustion chamber, and fully burning to generate a high-temperature combustion airflow; S2: Feedstock oil injection: After filtering, the feedstock oil is pumped to the feedstock oil preheater and preheated to the set temperature. It is then sprayed into the reaction chamber of the reactor through a feedstock oil gun. The preheated feedstock oil mixes with the high-temperature combustion airflow entering the reaction chamber at high speed, causing the feedstock oil to rapidly vaporize and crack to produce carbon black. S3: Injection of titanium-containing material: After the raw oil is injected, the titanium-containing material is injected at the injection point of the titanium-containing material. The titanium-containing material is mixed with the carbon black, raw oil and high-temperature combustion airflow in the previous step to form titanium-treated carbon black; S4: Termination of reaction: The high-temperature airflow containing titanium-treated carbon black flows into the rear collection section of the reactor, and quenching water is sprayed directly into the high-temperature airflow through a nozzle to rapidly cool the high-temperature airflow to terminate the carbon black reaction; S5: Collection: The cooled air flow is processed by a cyclone separator and a bag filter to separate the titanium-treated carbon black and waste gas; The reaction chamber includes a throat contraction section, a throat straight section and a throat expansion section connected in sequence, the diameter of the throat straight section is D, the feedstock oil injection point and the titanium-containing material injection point are located on the same horizontal line and the straight-line distance is L, and the L / D ratio range is 0≤L / D<1.

2. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: In the step S1, the combustion oil is ethylene tar, and the ethylene tar is heated to 120° C. in a fuel oil heater.

3. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: The preheated air in the combustion chamber is pressurized by the main air supply fan and then enters the air preheater to be preheated to about 850° C. before entering the combustion chamber.

4. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: In the step S2, the crude oil is preheated to 220°C in the crude oil preheater.

5. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: A quencher is provided in the collecting section at the rear of the reactor, and the quencher sprays quenching water through a nozzle to reduce the temperature and terminate the reaction.

6. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: The raw material oil is ethylene tar, clarified oil or a mixture of the two.

7. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: The titanium-containing substance is a mixture of one or more of titanium dioxide solid, titanium dioxide solution, titanate and titanium compound.

8. The method for producing petroleum-based furnace carbon black according to claim 1, wherein: Based on 100 parts by weight of the total weight of the titanium-treated carbon black, the amount of the titanium-containing substance introduced is 0.1-30 parts by weight.

9. Carbon black produced by the production method of petroleum-based furnace carbon black according to any one of claims 1 to 8, characterized in that: The titanium content in the carbon black is 0.1%-23%.

10. Use of the carbon black according to claim 9 in light-shielding fabrics and color pastes.

Images