27 results about "Aromatic solvents" patented technology

The utility model discloses a constant-temperature structure of aromatic hydrocarbon solvent distillation equipment, which relates to the technical field of aromatic hydrocarbon extraction and comprises a base, a heating seat fixedly connected to the upper end of the base, a constant-temperature tank fixedly connected to the upper end of the heating seat, a distillation retort arranged inside the constant-temperature tank, and a fixing frame fixedly connected to the outer surface of the distillation retort. The fixing frame is fixedly connected with the inner wall of the constant-temperature tank, a distillation outlet is formed in the upper end of the distillation tank, a feeding port is formed in the side face of the distillation tank, a liquid level control mechanism is arranged at the feeding port, a heating component and a constant-temperature module are arranged between the constant-temperature tank and the distillation tank, and a moving unit is arranged at the lower end of the base. The aromatic hydrocarbon solvent is heated and distilled through the heating component, heating is uniform, the aromatic hydrocarbon solvent is subjected to constant-temperature distillation through the constant-temperature module, and the distillation efficiency and the distillation effect are improved; and through the liquid level control mechanism, when the liquid level is low, the aromatic solvent can be automatically added, so that the influence on distillation caused by unknown distillation of the aromatic solvent or too little aromatic solvent is avoided.

The invention discloses a supported metallocene catalyst and a preparation method and application thereof, the supported metallocene catalyst comprises a mixture and / or a reaction product of the following components: (A) a reaction mixture of modified alkylaluminoxane and a modified compound, the modified compound being selected from at least one of benzoic acid and substituted benzoic acid; (B) a carrier; (C) a metallocene compound; and (D) an alkane. The supported metallocene catalyst disclosed by the invention is completely prepared by using an alkane solvent, so that the problems caused by using an aromatic hydrocarbon solvent are avoided, the production process of the catalyst is simplified, and industrial implementation is facilitated. The content of Al in the prepared catalyst is larger than 6% by weight, the content of transition metal elements is 0.05-1% by weight, the loading efficiency of the modified methylaluminoxane is improved, the catalyst is used for ethylene polymerization reaction, the performance is good, and the polymerization activity is obviously improved.

The invention relates to the technical field of alkyd resin-based rusty anti-rust coatings, and particularly discloses a rusty anti-rust coating and a preparation method thereof. The on-rust anti-rust coating comprises the following raw materials: composite modified resin, an emulsifier, a filler, an anti-rust pigment and a rust conversion agent, the composite modified resin is prepared by modifying alkyd resin, coumarone resin and polyether polyurethane resin through maleic anhydride; the alkyd resin comprises the following raw materials: polyol, phthalic anhydride, terephthalic acid, soybean oil fatty acid and a high-flash-point aromatic solvent. A composite system of alkyd resin, coumarone resin and polyether polyurethane resin realizes comprehensive improvement of adhesive force, corrosion resistance, constructability and environmental adaptability through advantage complementation, and is matched with an emulsifier, a filler, an anti-rust pigment and a rust conversion agent, so that the adhesive force to a rusty substrate and the corrosion resistance of the coating are remarkably improved, and the service life of the coating is prolonged. And the method has remarkable technical economy and market application potential.

The utility model provides an aromatic hydrocarbon solvent preparation tank, which relates to the field of preparation tanks and comprises a preparation tank body arranged on a device frame, a preparation tank cover capable of being opened in a turnover manner is arranged on the preparation tank body, a support frame is arranged on the preparation tank body, and the support frame is used for supporting the preparation tank body. The preparation tank cover can be turned over and opened relative to the opening of the preparation tank body, the supporting sleeve part plays a role in supporting the preparation tank cover and is supported on the outer wall of the preparation tank body through the stable structure, and through the design, under the condition that the preparation tank cover is not removed, the preparation tank cover can be turned over and opened; compared with the prior art, the device has the advantages that the device can be conveniently turned over and opened so that an operator can enter the tank for overhauling operation, necessary supporting force is provided in the opening process, the safety risk possibly caused by improper treatment of the prepared tank cover is greatly reduced, and therefore the using effect and safety of the whole device are guaranteed.

The utility model relates to the technical field of aromatic solvents, and discloses a high-boiling-point aromatic solvent separating and recycling device which comprises a separating tank, a cover is arranged at the top of the separating tank, a conical hopper is fixedly connected to the bottom of the separating tank, a feeding hopper penetrates through and is fixedly connected to the top of the cover, and a first filter screen is slidably connected to the inner wall of the feeding hopper. A fixing plate is fixedly connected to one side of the outer wall of the conical hopper, a motor is fixedly connected to the bottom of the fixing plate, the output end of the motor penetrates through the conical hopper and is fixedly connected with a transmission rod, the left end of the transmission rod penetrates through the protective shell and is fixedly connected with a driving bevel gear, and a driven bevel gear is connected to one side of the outer ring of the driving bevel gear in a meshed mode. According to the utility model, through the first filter screen, the second filter screen, the cleaning brush, the motor and the transmission rod, a solvent firstly enters the feed hopper, and the first filter screen firstly filters larger particles and then enters the second filter screen for secondary filtration.

Present invention relates to a method for producing green fluorescent paint for use as a lighting for energy-efficient highway lane and park markings, characterized as comprising following production steps; adding 9,10-dibromoanthracene, CuI, Pd catalyst, diisopropylamine and toluene in a reaction flask under nitrogen atmosphere and stirring them on a magnetic stirrer, adding tetraphenylsilanacetylenyl to the mixture and performing reflux distillation by increasing the reaction temperature, after 24 hours bringing the temperature to room temperature, obtaining pure product from the mixture brought to room temperature using column chromatography, taking 0-1% by mass of the product and mixing it in resin and an aromatic solvent for 6-24 hours.

The utility model discloses an aromatic hydrocarbon solvent distillation frame which comprises a base and a clamp, the clamp can be used for clamping a distillation device, one end of the clamp is fixedly connected with a ratchet wheel, and one end, far away from the clamp, of the ratchet wheel is fixedly connected with a knob. According to the fixture disclosed by the utility model, the distillation tube of an aromatic hydrocarbon solvent is placed in the cavity formed by the fixed frame and the movable frame, and then the movable frame is moved and locked by using the tightening bolt, so that the distillation tube can be fixed in the fixture; then the rotary knob is rotated to enable the ratchet wheel to rotate, the ratchet wheel drives the clamp to rotate, the clamp rotates to drive the internal distillation pipe to rotate, the posture of the distillation pipe can be changed, the distillation pipe rotates from a vertical state to an inclined state, the flowing speed of cooling water in the distillation pipe is improved, and therefore the distillation speed is adjusted; when the included angle between the distillation pipe and the ground is larger after the distillation pipe rotates, the freezing speed of cooling water in the distillation pipe is higher, so that the distillation speed is higher, and otherwise, the distillation speed is lower.

The present invention relates to polymerizable liquid crystalline formulations and especially to an ink formulation for inkjet printing comprising 10 to 50% w / w of one or more polymerizable liquid crystalline compounds and 50 to 90% w / w of one or more organic solvents selected from the group of aliphatic ketones, cyclic ketones, alkyl ethers of ethylene glycol or propylene glycol, alkyl esters of menthyl or aromatic solvents.

This invention belongs to the field of lubricating oil additives, specifically relating to a soot-dispersible polyisobutylene succinimide dispersant, its preparation method, and its application. The preparation method includes the following steps: (1) mixing polyisobutylene maleic anhydride, base oil, and aromatic solvent, stirring evenly, heating, adding polyethylene polyamine, introducing nitrogen gas, heating to the aromatic reflux temperature, and performing an amidation reaction to obtain product 1; (2) adding aminophenylboronic acid to product 1, continuing reflux, borizing reaction, removing the solvent by vacuum distillation, filtering, and obtaining the soot-dispersible polyisobutylene succinimide dispersant. The dispersant in this invention has the characteristic of good soot dispersion performance. The prepared product can improve the soot dispersion of oil products with a lower dosage. Moreover, the use of aminophenylboronic acid for borization reaction can improve high-temperature detergency. The preparation process of this invention is simple and easy to implement.

The present application provides a method and system for hydrogenation lightening of ethylene tar, which comprises: a) removing gum from ethylene tar raw material through pretreatment separation; b) removing the polymerizable component above 200 DEG C through first liquid-phase hydrogenation of the ethylene tar raw material from which the gum is removed to obtain a first liquid-phase hydrogenation stream; c) after gas-liquid separation of the first liquid-phase hydrogenation stream, the liquid-phase stream is subjected to second gas-phase hydrogenation so that the unsaturated hydrocarbon component in the liquid-phase stream is subjected to second gas-phase hydrogenation to obtain a second gas-phase hydrogenation stream; d) after gas-liquid separation of the second gas-phase hydrogenation stream, the liquid-phase mixture is separated to obtain a light fraction with a distillation range of 40-220 DEG C and a heavy fraction. The present application can recover and separate heavy aromatic solvent oil and other products. The method can be used for treating C9+, C10+ ethylene tar byproduct of refinery device to increase production of light aromatic hydrocarbon or high-octane gasoline blending component with high added value.

The invention discloses a method and equipment for inactivating a catalyst of a dechlorination bed of a propane dehydrogenation device, and belongs to the technical field of petrochemical engineering. Comprising the following steps: S1, regeneration operation: carrying out hot nitrogen steam stripping on a dechlorinating agent in a dechlorinating bed through low-pressure nitrogen, and removing aromatic solvent oil and residual impurities adsorbed by the dechlorinating agent; s2, passivation operation: injecting low-pressure steam into the dechlorinating bed in stages, and enabling the low-pressure steam and nitrogen to generate a passivation reaction until the dechlorinating agent is completely inactivated under the synergistic effect of the low-pressure steam and the nitrogen; and S3, unloading the dechlorinating agent, namely safely unloading the dechlorinating agent after inactivation from the dechlorinating bed, and replacing the dechlorinating agent with a new dechlorinating agent. Aromatic solvent oil adsorbed by the dechlorinating agent is removed through hot nitrogen steam stripping, and then the dechlorinating agent is ensured to be completely inactivated before being unloaded through staged steam passivation, so that the problem that in the prior art, solvent oil overflows in the fire extinguishing process of the dechlorinating agent in a water injection mode during agent unloading, and the fire extinguishing effect is poor is solved. The surrounding environment is polluted; and a downstream water treatment system is impacted.

A surface modifying composition for modifying a surface of a formed product made of high-density polyethylene or ultra-high molecular weight polyethylene, the composition comprising:a copolymer having a unit of a first monomer having an aliphatic group having 10 or more carbon atoms and a unit of a second monomer having any of an amino group, an epoxy group, and an ether group, anda solvent having a boiling point of 100° C. or more and being at least one selected from the group consisting of a halogen-based solvent, an alkane solvent, a cycloalkane solvent, a dicycloalkane solvent, an aromatic solvent, and a nitro-based solvent.

This invention relates to a high flash point alkyd coating with a VOC content below 420 g / L and its preparation method, belonging to the field of coatings. The high flash point alkyd coating comprises: high flash point alkyd resin, 65% petroleum resin liquid, dicyclopentadienyloxyethyl methacrylate, various environmentally friendly pigments, ultrafine barium sulfate, organic bentonite, dispersant, defoamer, cobalt isooctanoate drier, low-naphthalene S-150 aromatic solvent, D60 environmentally friendly solvent, and anti-skinning agent. Under suitable application viscosity (either the coating itself or after adding diluent), the actual VOC content of the high flash point alkyd coating prepared by this invention is still less than 420 g / L, whether applied with the coating itself or after adding diluent. It exhibits good surface finish, drying properties, recoatability, and overall film performance that meets the requirements of the national recommended standard GB / T 25251-2010 for alkyd resin coatings.

This invention relates to the field of waterproof coating technology and discloses a high-strength single-component polyurethane waterproof coating, comprising the following components by mass percentage: 32%~35% polyether polyol-toluene diisocyanate-terminated NCO prepolymer, 1.0%~1.4% bis(3-aminopropyl)disiloxane, 2.0%~2.5% latent curing agent; 0.7%~0.9% 2,5-furandimethyl alcohol; 38%~40% compound filler; 6.5%~7.5% low-aromatic environmentally friendly heavy aromatic solvent S-150; 0.25%~0.35% organic bismuth catalyst; 0.5%~0.7% polyether-polyester grafted modified polysiloxane defoamer; and 1.0%~1.2% compound antioxidant. This invention has the effect of improving the strength and toughness of the waterproof coating.

The invention relates to the technical field of hydrogenated tail gas treatment, in particular to a hydrogen peroxide hydrogenated tail gas comprehensive treatment method which comprises the following steps: hydrogenated tail gas separated from a hydrogenation tower is introduced into a hydrogenated tail gas condenser and then enters a hydrogenated tail gas condensate receiving tank, and an aromatic solvent is condensed and recovered; uncondensed dead steam is pressurized and then sequentially passes through a PSA adsorption tank and a hydrogen filter, and purified hydrogen is circulated back into the hydrogenation tower; the desorbed gas flowing out of the hydrogenated liquid storage tank enters an emptying condenser, and the solvent is condensed and recovered; and flowing-out uncondensed gas is introduced into an activated carbon fiber unit, and is discharged into a waste gas incinerator for incineration treatment after being adsorbed. According to the invention, the aromatic hydrocarbon solvent in the hydrogenated tail gas is removed through condensation, the hydrogenated tail gas is pressurized and then is sequentially purified by the PSA adsorption tank and the hydrogen filtering tank, the purity of the purified hydrogen reaches 99.9%, the purified hydrogen can be re-injected into the hydrogenation tower, the recovery of aromatic hydrocarbon and the recycling of the hydrogen are realized, and the cost is saved.

The present invention relates to a method for determining the concentration of hydroxyl groups present in a polyol, comprising the following steps: acetylation of the hydroxyl groups of the polyol to ester groups by reacting the polyol with excess acetic anhydride, hydrolysis of the mixture of acetylated polyol, acetic anhydride, and acetic acid obtained at the end of step (i), and potentiometric determination of the acetic acid obtained at the end of step (ii), step (i) of acetylation being carried out in the presence of at least one 4-dialkylaminopyridine catalyst of formula (1) or one of its salts: (1) in which R and R', identical or different, are C1-C6 alkyl groups, or R and R' together form a C2-C6 ring, and in the presence of at least one solvent selected from: - aromatic solvents selected from toluene, xylene, Anisole, chlorobenzene and bromobenzene, acetone, ethyl acetate, and mixtures thereof. Figure for the summary: Fig. 1.

The invention provides a composition for a multi-layer high-frequency high-speed copper-clad plate bonding sheet, the bonding sheet and a preparation method, and belongs to the technical field of high-frequency hydrocarbon copper-clad plates. The composition is prepared from the following components in parts by mass: 10 to 20 parts of first thermosetting resin, 5 to 15 parts of second thermosetting resin, 55 to 75 parts of composite ceramic filler, 8 to 18 parts of flame retardant, 0.2 to 1.0 part of initiator, 0.8 to 2.5 parts of bifunctional silane coupling agent, 20 to 40 parts of aromatic solvent oil and 0.1 to 0.5 part of antioxidant. The composition for the multi-layer high-frequency and high-speed copper-clad plate bonding sheet and the preparation method have the obvious advantages that the components such as the first type of thermosetting resin, the second type of thermosetting resin and the composite ceramic filler are reasonably selected, and the use amount of each component is controlled, so that the bonding performance of the multi-layer high-frequency and high-speed copper-clad plate bonding sheet is improved; the bonding sheet with excellent bonding performance, dielectric performance, heat resistance, filling performance and the like can be prepared.

The present application relates to chemical refining technical field, specifically to a kind of preparation high-boiling aromatic hydrocarbon solvent aromatic hydrocarbon separation device and method thereof, wherein separation device includes separation tower and reboiler, reboiler includes tank body, tank body is communicated with separation tower by the feed pipe of side portion, tank body top has the gas outlet pipe and is communicated with separation tower, heating device is provided in tank body, for liquid material heating, stirring mechanism is provided in tank body, for liquid material is stirred, driving mechanism is provided in tank body and extends vertically.The present application drives stirring mechanism to reciprocating lifting adjustment in tank body by driving mechanism, makes stirring point position cover tank body height range, breaks the limitation that traditional stirring flow field concentrates in lower part of tank body, promotes upper and lower layer liquid material to be fully mixed and flow, eliminates longitudinal flow dead angle, improves overall heat exchange efficiency and mass transfer effect, stirring area acts to liquid surface place active defoaming, maintains gas-liquid interface stability, ensure that separation device operating pressure and liquid level fluctuation are within safe range.

The invention relates to the technical field of liquid silicone rubber coatings, and discloses a liquid silicone rubber coating and a preparation method thereof. Comprising the following components in parts by mass: 6-15 parts of high vinyl silicone oil, 10-25 parts of a silicone rubber emulsion, 20-35 parts of low vinyl silicone oil, 35-50 parts of liquid silicone resin, 11-14 parts of fumed silica, 2.2-3.5 parts of hexamethyldisilazane, 15-25 parts of a butylbenzene thermoplastic elastomer, 2-5 parts of diatomite, 2-5 parts of an aromatic hydrocarbon solvent and 0.1-0.3 part of an ultraviolet light absorber. The liquid silicone rubber coating provided by the scheme has high wear resistance and elasticity, and is provided by the butylbenzene thermoplastic elastomer component, so that the coating has excellent wear resistance and elasticity, and is suitable for various application environments; according to the scheme, the liquid silicone rubber coating has weather resistance and ultraviolet protection effects, and contains the ultraviolet light absorber, so that the weather resistance and ultraviolet resistance of the coating can be improved, and the service life is prolonged.

The present invention discloses a pigment for increasing the hiding power of white coatings, comprising aluminum pigment and titanium dioxide pigment with a mass ratio of 0.1 - 0.2:8.7 - 8.9; by mass percentage, the aluminum pigment comprises 69 - 72% of aluminum flakes, 20 - 25% of hydrodesulfurized kerosene, 5 - 10% of aromatic solvent, and 0 - 2% of oleic acid. This pigment replaces titanium dioxide with aluminum pigment within a specific particle size range without increasing the total amount of pigment. At the same time, the present invention also discloses a white coating comprising this pigment, which improves the hiding power of the white coating without increasing the solid content of the white coating by relying on the excellent hiding performance of the aluminum pigment.

The invention relates to the technical field of oilfield chemistry, in particular to a paraffin remover for a carbon dioxide flooding well and a preparation method of the paraffin remover for the carbon dioxide flooding well, and the paraffin remover for the carbon dioxide flooding well comprises the following raw materials in percentage by weight: 40-60% of terpinene, 8-10% of dimethyl succinate, 2-5% of surfactant and the balance of C9 aromatic solvent oil. The paraffin remover for the carbon dioxide flooding well and the preparation method of the paraffin remover are provided for solving the problem of paraffin precipitation of the carbon dioxide flooding well, the paraffin remover for the carbon dioxide flooding well is stable in paraffin dissolving rate under the low-temperature condition, the flash point of a formula system of the paraffin remover is higher than 45 DEG C, the components are easy to biodegrade, and the paraffin remover has the advantages of being safe and environmentally friendly.

The invention provides a salt-spray-resistant high-temperature-resistant friction-resistant coating as well as a preparation method and application thereof. The coating comprises the following components in parts by weight: 75-88 parts of mineral oil, 2-8 parts of an anti-rust additive, 0.1-0.5 part of an anti-oxidation additive, 0.8-4.4 parts of a drier, 8-18 parts of a solid lubricating additive, 22-35 parts of film-forming resin, 15-18 parts of flaky metal pigment and 4-14 parts of a solvent, the mineral oil is selected from a mixture of dearomatized solvent oil, hydrogenated base oil and propylene glycol methyl ether acetate; the solid lubricating additive is selected from at least one of graphene or PEEK powder; the film-forming resin is selected from polyurethane resin; the flaky metal pigment is selected from non-floating neutral aluminum paste. The coating system provided by the invention is simple, pretreatment such as electroplating does not need to be carried out on the disc spring substrate, an effective protective layer can be formed through a simple coating process, the salt spray corrosion resistance, high temperature resistance and friction resistance of the semi-open flexible crimping type IGBT device are remarkably improved, and the long-term use reliability of the device is improved.

The present invention relates to polymerizable liquid crystal formulations, in particular to ink formulations for ink jet printing comprising 10 to 50% w / w of one or more polymerizable liquid crystal compounds and 50 to 90% w / w of one or more organic solvents, the organic solvent is selected from aliphatic ketone, cyclic ketone, alkyl ether of ethylene glycol or propylene glycol, alkyl ester of menthyl or aromatic solvent.

The invention provides a composite additive for modifying ethylene tar and a preparation method of the composite additive. The invention relates to a composite additive for modifying ethylene tar. The composite additive comprises the following components in parts by weight: 2-5 parts of nonylphenol polyoxyethylene ether, 2-5 parts of polyisobutylene succinimide, 1 part of hindered phenol antioxidant and 15-88 parts of heavy aromatic solvent oil. Three functional components, namely nonylphenol polyoxyethylene ether serving as a permeation disintegration type coupling agent, polyisobutylene succinimide serving as a steric hindrance type dispersing agent and hindered phenol antioxidant serving as a chemical stabilizer, are compounded to form a synergistic mechanism of physical dispersion and chemical passivation, so that the problems of high viscosity and instability of ethylene tar are solved.

The utility model discloses a leakproof device for aromatic solvent production, and relates to the technical field of aromatic solvent production, the leakproof device for aromatic solvent production comprises a pipeline, the surface of the pipeline is provided with a fixed shell I and a fixed shell II, the interior of the fixed shell II is fixedly connected with a fixed frame, the interior of the fixed frame is slidably connected with a sliding rod, and the sliding rod is fixedly connected with the pipeline. The end, located outside the fixing frame, of the sliding rod is fixedly connected with a connecting plate, the surface of the connecting plate is fixedly connected with a covering bag, the end, located inside the fixing frame, of the sliding rod is fixedly connected with a sliding block, and the interior of the fixing frame is rotationally connected with a worm wheel. According to the device, the situation that a worker stretches the device manually is avoided, the covering bag can cover the flange connecting position of the pipeline conveniently, the worker can use the device conveniently, meanwhile, the covering bag is prevented from making contact with a flange during manual pulling, and therefore the situation that the covering bag is damaged due to friction is avoided.

Provided is a composition comprising a blend of polystyrene and an aromatic-rich hydrocarbon feedstock. Also provided is a process for preparing a stable blend of polystyrene and an aromatic-rich hydrocarbon feedstock which can be stored or transported if desired. In one embodiment, the aromatic-rich hydrocarbon feedstock comprises light cycle oil, heavy gasoline, heavy reformate, an aromatic solvent, or a mixture thereof. The amount of polystyrene in the blend comprises no more than 20 wt. % of the blend. The blend can be passed to a conversion unit for conversion of the polystyrene.

The invention provides a method for preparing cyclohexane and low-aromatic solvent oil from coal-based naphtha, which comprises the following steps: S1, introducing the coal-based naphtha into a light hydrocarbon removal tower for light hydrocarbon removal treatment, discharging C5 and less light hydrocarbon components from the top of the light hydrocarbon removal tower, and discharging a first tower bottom material from the bottom of the light hydrocarbon removal tower; s2, the first tower bottom material is introduced into a cyclohexane rectifying tower for rectification treatment, cyclohexane is discharged from the tower top of the cyclohexane rectifying tower, and a second tower bottom material is discharged from the tower bottom of the cyclohexane rectifying tower; s3, the second tower bottom material and hydrogen are introduced into a hydrogenation reactor for a hydrogenation reaction, and a hydrogenation product is obtained; and S4, introducing the hydrogenation product into a fractionating tower for fractionating treatment to obtain the low-aromatic solvent oil. According to the method, not only is a high-purity cyclohexane product (the purity is greater than or equal to 99.9%) obtained, but also high-grade low-aromatic solvent oil (aromatic hydrocarbon is less than or equal to 0.01%) is obtained as a byproduct, and the high additional value of the coal-based naphtha is greatly improved.