13 results about "Aromatic solvents" patented technology

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.

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.

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 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 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 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 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 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.