49 results about "Aromatic solvent" patented technology

Systems and methods are provided for producing mesophase pitch, including, forming isotropic pitch by reacting a feed and acid at an elevated temperature, wherein the feed comprises a single-ring aromatic compound or a multi-ring aromatic compound, or both, mixing the isotropic pitch with a first solvent comprising an aromatic solvent to give a mixture, heating the mixture to a temperature to give mesophase pitch; and washing the mesophase pitch with a second solvent, wherein the mesophase pitch comprises a softening point less than 400 °C.

The present invention relates to a process for needle coke production by co-processing coal tar pitch (CTP) with petroleum streams. The process utilizes a ‘multi-residence time mild thermal cracking’ of coal tar pitch with petroleum streams (CLO, PFO) followed by solvent-assisted selective separation of undesirable quinoline insoluble (QI) and solid catalyst fines from the mixed pitch and delayed coking thereafter to produce needle coke. The solvent employed for feedstock purification is a mixture prepared from an aromatic solvent which is a lighter fraction formed by mild and severe thermal cracking of mixed feedstock, an aliphatic solvent and a polar extraction solvent.

A process for treatment of C9+ aromatic complex bottoms feedstream that includes reacting the feedstream in the presence of a hydrodearylation catalyst and hydrogen under specified reaction conditions for hydrodearylation to produce liquid effluents containing dearylated hydrocarbons and separating the liquid effluents into a BTEX-rich fraction and a solvent fraction, and recovering the solvent fraction.

The application discloses a kind of based on trace new asphalt full RAP cold regeneration asphalt mixture and preparation method, the content of each substance in the cold regeneration asphalt mixture is asphalt pavement recycling material 96-97wt%, dilution asphalt 0.8-1wt%, old material activator 1.5-2wt%, mineral powder 0.5-1wt%, diluent and old material activator contain D40 de-aromatic solvent oil and D60 de-aromatic solvent oil.The preparation method includes the following steps: preparation dilution asphalt and old material activator;Rich oil and lean oil asphalt pavement recycling material, mineral powder are placed in oven and dried;First, rich oil and lean oil asphalt pavement recycling material are respectively mixed with old material activator, then mixed with dilution asphalt, mineral powder.The cold regeneration asphalt mixture prepared by the application has excellent comprehensive performance, and at the same time realizes the maximization of RAP material regeneration ratio and the trace control of new asphalt.

The invention discloses a mixed aromatic solvent separation device sewage pool with an anti-volatilization structure, and relates to the technical field of sewage treatment, the mixed aromatic solvent separation device sewage pool comprises a pool body, a sealing cover is arranged above the pool body, and a sealing assembly for enhancing sealing and preventing volatilization is arranged at the bottom end of the sealing cover. According to the mixed aromatic solvent separation device sewage pool with the anti-volatilization structure, through the arrangement of the square water collecting tank, the square bottom supporting frame, the positioning screw holes, the positioning bolts, the square flange ring, the fixing screw holes and the sealing cover, when the mixed aromatic solvent separation device sewage pool is used, clear water is injected into the square water collecting tank and completely submerges the square bottom supporting frame, and the sealing cover covers the top of the pool body; the square flange ring at the bottom is aligned with the square bottom support frame, the positioning bolts are driven along the fixing screw holes, the sealing cover and the square flange ring are fixed with the square bottom support frame, and clear water in the square water collecting tank synchronously submerges the square flange ring to form sealing, so that the functions of enhancing sealing and preventing volatilization are realized; the problem that the sealing performance of a device cover plate is insufficient is solved.

Forming a catalyst system in the absence of aromatic solvents may be desirable. Catalyst systems effective for olefin polymerization may comprise a support material, an aluminum oxane formed in situ on the support material from a trialkylaluminum compound and water in the absence of aromatic solvents such as toluene, and a metallocene with C1 symmetry and containing a Group 4 metal. To form the catalyst system, the support material can be slurried in an aliphatic hydrocarbon solvent in the presence of water and contacted with a trialkylaluminum compound to form a supported activator, and the supported activator can be contacted with a metallocene with C1 symmetry and containing a Group 4 metal.

A resin sheet including a support and a resin composition layer formed on the support, in which the resin composition layer contains (A) an epoxy resin, (B) an organic solvent, (C) an inorganic filler, and (D) a stress relaxing material, in which a content of an aromatic solvent having a boiling point of lower than 120° C. in the (B) component is in the range of 0 to 9% by mass relative to 100% by mass of total of the (B) component, can suppress an irregularity after lamination and a warpage after curing.

The application discloses a method for cracking tar into high value-added products, which adopts a route of separating light components by fractional distillation and then hydrogenating heavy components, so that the yield of target products can be affected by hydrogenation of naphthalene, methyl naphthalene and the like below 250 DEG C in the process of hydrocracking, and on the other hand, the components below 250 DEG C account for about 30% to 50%, so that the hydrogen consumption in the subsequent hydrocracking can be reduced by separating the components in advance. After the heavy fraction is subjected to hydrocracking, part of polycyclic aromatic hydrocarbons in the heavy fraction can be cracked into part of monocyclic aromatic hydrocarbons, which can be used for producing aromatic solvent oil, so that the light fraction in the hydrocracking product is separated and mixed into the light fraction generated by pre-fractionation, and the next step processing is carried out, so that the yield of high value-added products can be further improved.

An electrolyte composition for lithium secondary batteries includes a lithium salt and an organic solvent. The organic solvent includes an aromatic solvent with fluorinated toluene derivatives (such as 2,3-difluorotoluene) and an ether solvent. The lithium salt can include compounds like Li(CF3SO2)2N, Li(SO2F)2N, LiPF6, and others. The aromatic solvent is present at about 30-90 vol % of the electrolyte, and the lithium salt molarity ranges from 0.1 to 3.0 M. This composition improves battery performance by enhancing stability, conductivity, and compatibility with lithium metal or lithium-ion electrodes, making it suitable for high-energy-density applications in lithium secondary batteries.

An electrolyte composition for lithium secondary batteries contains a lithium salt and an organic solvent. The organic solvent includes an aromatic solvent with fluorinated toluene derivatives (such as 2,3-difluorotoluene) and an ether solvent. The lithium salt may contain compounds such as Li(CF3SO2)2N, Li(SO2F)2N, LiPF6, and others. The aromatic solvent is present in the electrolyte at a concentration of approximately 30–90 vol%, and the molarity of the lithium salt ranges from 0.1 to 3.0 M. This composition improves battery performance by increasing stability, conductivity, and compatibility with lithium-metal or lithium-ion electrodes, making it suitable for high-energy-density applications in lithium secondary batteries.

This invention discloses a method for preparing a high water-resistant zinc dialkyl dithiophosphate additive. Specifically, the method involves: first, weighing an alkyl alcohol; then, under stirring conditions, adding phosphorus pentasulfide in batches to the alkyl alcohol; after the addition is complete, heating the reaction, followed by vacuum distillation, cooling, and filtration to obtain dialkyl dithiophosphate; second, stirring an aromatic solvent with zinc oxide to form a homogeneous phase; adding a fatty acid salt promoter and the intermediate dialkyl dithiophosphate; stirring; then adding zinc oxide in batches; after the addition is complete, heating and vacuum reactions are performed, followed by cooling; adding sulfides; and then heating, vacuum distillation, and filtration to obtain the high water-resistant zinc dialkyl dithiophosphate additive. This high water-resistant zinc dialkyl dithiophosphate additive can be used to formulate high-performance oil film bearing oils, giving the oil excellent water separation properties, anti-wear properties, and excellent filterability, hydrolytic stability, and outstanding load-bearing capacity.

A method for separating high-purity mesitylene from heavy aromatics by using adsorption separation technology, the method selects X molecular sieve treated by ammonium salt after ion exchange of alkaline earth metal and transition metal as the active component of adsorbent, uses the method of adsorption separation, passes heavy aromatics raw material into the adsorbent, adsorbs the mesitylene therein, obtains raffinate, passes in desorbent, desorbs the adsorbed mesitylene, obtains extract, the desorbent in the extract and raffinate can be recycled, the remaining components of the extract are high-purity mesitylene product, the remaining components of the raffinate can be used as gasoline blending component or high-boiling aromatic solvent oil component. The method can solve the problem that high-purity mesitylene cannot be obtained from heavy aromatics in the existing process.

The application belongs to the technical field of thermoplastic polyurethane elastomers, and particularly relates to a photo-induced deformation TPU material and a preparation method and application thereof. The photo-induced deformation TPU material comprises the following raw materials in parts by weight: 30-38 parts of diisocyanate; 5-10 parts of modified black phosphorus nanosheet; 40-50 parts of polycarbonate diol; 9-12 parts of chain extender; and 0.5-1 part of catalyst. The preparation method of the modified black phosphorus nanosheet comprises the following steps: performing ice-water bath ultrasonic treatment on black phosphorus crystals and an amino compound in a polar aprotic solvent to obtain amino-functionalized black phosphorus nanosheet; and dispersing the amino-functionalized black phosphorus nanosheet in an aromatic solvent to make it react with diphenylmethane diisocyanate to obtain the modified black phosphorus nanosheet. The photo-induced deformation TPU material prepared by using the modified black phosphorus nanosheet as a light response filler has excellent photo-induced deformation performance, good mechanical performance and cycle stability.

The subject of the invention is a method for the fluorescent detection of aromatic compounds using 1,5-diisocyanonaphthalene. The invention is based on the fluorescent properties of 1,5- diisocyanonaphthalene (1,5-DIN) in different aromatic solvents, demonstrating its potential for distinguishing between aromatics based on emission spectra. The spectra can be classified into benzene, toluene, and xylene types and are suitable for identifying various substituted benzenes. The unique properties of 1.5-DIN emissions can be used to analyze BTX mixtures and design self- organizing systems such as foldamers.

The invention relates to an efficient oil-soluble asphalt dispersant. The dispersant is prepared from the following raw materials in parts by weight: 20-30 parts of polyisobutylene succinic anhydride, 15-25 parts of fatty alcohol-polyoxyethylene ether, 8-15 parts of organic amine, 30-50 parts of an aromatic solvent and 1-3 parts of an antioxidant. The oil-soluble asphalt dispersant disclosed by the invention has excellent dispersing performance, so that asphaltene can be uniformly dispersed in an oil phase, and deposition and aggregation of the asphaltene are effectively prevented; 2, the heat stability and the chemical stability are good, and a good dispersion effect can still be kept in a high-temperature, high-pressure and complex chemical environment; the preparation method is simple, raw materials are easy to obtain, cost is low, and the method is suitable for large-scale industrial production; the method has wide adaptability to petroleum with different sources and properties, and can meet diversified industrial requirements.

The present application relates to the technical fields of chemical synthesis and pharmaceutical analysis, and particularly relates to a separation method of Z configuration and E configuration of intermediate B for preparing Afuganana, which comprises the following steps: (1) preparing intermediate B; (2) recrystallizing intermediate B in an aromatic solvent or a mixed solvent containing an aromatic solvent, and filtering to obtain a first filter cake and a first filtrate; (3) drying the first filter cake obtained in step (2) to obtain intermediate B of E configuration; (4) concentrating and heating the first filtrate obtained in step (2), and performing heat preservation and filtering to obtain a second filter cake; and (5) drying the second filter cake obtained in step (4) to obtain intermediate B of Z configuration. The present application has the beneficial effect that Z and E configurations are successfully separated through a specific combined process of "recrystallization-concentration-heat filtration". The separation method of the present application is simple in process, convenient in operation, low in cost and high in separation efficiency.

A method for separating trimethylbenzene monomers from heavy aromatics, comprising: after adsorption separation of heavy aromatic raw materials, obtaining an extract and a raffinate, recycling the desorbent in the extract, and the stream components being a mixture of three isomers of mesitylene, cymene and trimethylbenzene, with a total purity of not less than 99 mass%; and the mixture stream being sequentially subjected to rectification to obtain corresponding trimethylbenzene monomers; and the adsorption separation raffinate being recycled after recycling of the desorbent and being used as a gasoline blending component or a high-boiling aromatic solvent oil component. The method combines adsorption separation and rectification processes to obtain high-purity mesitylene, cymene and trimethylbenzene monomers, with the characteristics of high yield, good product quality, low operating energy consumption, and high product added value.

The utility model relates to the technical field of aromatic hydrocarbon solvent rectification, in particular to a high-boiling-point aromatic hydrocarbon rectification heat exchanger which comprises a base, a rotating handle is arranged on one side of the base, a screw rod is installed on one side of the rotating handle, the surface of the screw rod is in threaded connection with a clamping block, and sliding grooves are formed in the two ends of the middle of the upper surface of the base. Sliding grooves are formed in the two sides of the heat exchanger body, sliding blocks are slidably connected into the sliding grooves, clamping grooves are formed in one sides of the sliding blocks, the heat exchanger body is installed at the tops of the sliding blocks, a feeding port is formed in the top end of one side of the heat exchanger body, a discharging port is formed in the top end of the other side of the heat exchanger body, and convex rings are installed on the two sides of the heat exchanger body. A cover plate is connected into the convex ring in a sleeved mode, and vertical frames are installed on the two sides of the outer surface of the convex ring. According to the improved heat exchanger, tedious bolt dismounting and mounting operation is avoided, the dismounting and mounting efficiency of the heat exchanger is improved, meanwhile, the interior of the heat exchanger is easier to clean and maintain, and the distillation efficiency of an aromatic solvent is improved.

A method for making a di(aminoaryl)fluorene compound that includes the steps of: (a) reacting a fluorenone compound according structure (I):with excess aminobenzene according to structure (II):wherein: each R1, R2, R3, R4, R12, and R13 is independently a group that is inert in the polymerization of epoxy compounds, and R11 is H or (C1-C6)alkyl, in the presence of an acid catalyst, in a liquid medium comprising an aromatic or substituted aromatic solvent having a boiling point of greater than or equal to 150° C. and from which the di(aminoaryl)fluorene compound is crystallizable, to form a crude product mixture comprising the di(aminoaryl)fluorene compound, (b) crystallizing di(aminoaryl)fluorene compound in the product mixture, and (c) separating the product mixture into crystallized di(aminoaryl)fluorene compound and a filtrate.

The application discloses a method for separating inert perfluoropolyether and active perfluoropolyether carboxylate by ion complex extraction, which comprises the following steps: dissolving a mixture containing inert perfluoropolyether and active perfluoropolyether carboxylate in a fluorine-containing solvent, contacting the mixture with an ion complex extraction agent, collecting the ion complex extraction agent phase after extraction equilibrium to obtain enriched active perfluoropolyether carboxylate, and collecting the fluorine-containing solvent phase to obtain enriched high-purity inert perfluoropolyether; the active perfluoropolyether carboxylate is perfluoropolyether with a carboxylate end group; the fluorine-containing solvent is one or more of a hydrofluoroether, a fluorine-containing ester, a perfluorinated or partially fluorinated alkane, and a perfluorinated or partially fluorinated aromatic solvent; and the ion complex extraction agent is an aqueous solution containing one or more of an ionic compound, a polyelectrolyte, and a guanidine compound.

This invention discloses a method for preparing sulfide materials for solid electrolytes, belonging to the technical field of solid electrolyte materials. The invention uses anhydrous LiOH solid as the lithium source, hydrogen sulfide gas as the sulfur source, and aprotic aromatic solvents and / or hydrogenated aromatic solvents as the reaction medium to carry out a gas-solid heterogeneous acid-base reaction, thereby obtaining sulfide materials for solid electrolytes. This invention utilizes the proton inertness and chemical stability of aprotic or hydrogenated aromatic solvents to suppress side reactions at the source; it constructs a controllable three-phase reaction interface by leveraging their low solubility for LiOH and moderate solubility for H2S; it achieves in-situ dehydration using high boiling point characteristics, promoting complete reaction and preventing Li2S hydrolysis; and it promotes uniform nucleation and inhibits hard agglomeration through surface tension regulation and solvent barrier effects, thereby obtaining high-purity, uniformly sized nanoscale sulfide materials.

This invention discloses a method for preparing an alkali metal anionic polymerization catalyst in a nonpolar system and its application. The alkali metal anionic polymerization catalyst comprises a polycyclic aromatic hydrocarbon compound, an alkali metal, a nonpolar solvent, and a structure modifier. The polycyclic aromatic hydrocarbon compound includes one or more of naphthalene, anthracene, phenanthrene, pyrene, β-carbamate, benzenexanthracene, dibenzenexanthracene, and perylene. The alkali metal includes one or more of lithium, sodium, and potassium. The nonpolar solvent includes one or more of alkanes, cycloalkanes, and aromatic solvents with 5 to 12 carbon atoms. The structure modifier includes one or more of ether compounds, amine compounds, alkoxy alkali metal salts, phosphorus compounds, and crown ether compounds. The molar ratio of the alkali metal to the aromatic hydrocarbon compound is 0.8–5:1, and the molar ratio of the structure modifier to the polycyclic aromatic hydrocarbon compound is 0.001–10:1. This invention solves the fundamental problem of introducing impurities into the polymerization system during catalyst preparation by eliminating polar solvents.

The application relates to the technical field of synthesis of photoresist initiators, and provides a synthesis method of diphenyl[4-(phenylthio)phenyl] perfluorobutyl sulfonium sulfonate, which comprises the following steps: using diphenyl sulfide, diphenyl sulfoxide and potassium perfluorobutyl sulfonate as raw materials, and performing reaction under the catalysis of anhydride and a strong inorganic acid; after the reaction is completed, the product is extracted by using an organic solvent; then aromatic solvent recrystallization is performed to obtain the diphenyl[4-(phenylthio)phenyl] perfluorobutyl sulfonium sulfonate, and the purity can reach more than 99%.

A composition useful to make an anode for lithium ion batteries may be made by A method to form particles comprising dispersing an initial powder comprised of silicon in a solvent such as a solvent comprised of a C5 to C18 aliphatic solvent or polar aprotic aromatic solvent, milling the initial particles to form a milled silicon powder having an average size of about 10 to about 300 nanometers, and depositing the milled silicon powder on a spherical graphite powder having an average size from about 5 to 200 times larger than the average size of the milled silicon powder to form the particles.

The invention relates to the technical field of demulsifiers, in particular to a low-temperature demulsifier for crude oil dehydration and a preparation method and application thereof. The demulsifying agent is prepared from the following components: a hyperbranched polyether modified dendritic phenol amine demulsifying agent, polyether modified polysiloxane, linear diol block polyether, tall oil fatty acid diethanolamide, diethylene glycol monobutyl ether, aromatic solvent oil S-150 and isopropanol. The preparation method comprises the following steps: adding the aromatic solvent oil S-150 and the isopropanol according to the proportion, and stirring for 10-20 minutes; then adding a hyperbranched polyether modified dendritic phenol amine demulsifier, heating and stirring, then cooling to room temperature, continuously adding linear diol block polyether, and stirring; finally, sequentially adding polyether modified polysiloxane, tall oil fatty acid diethanolamide and diethylene glycol monobutyl ether; and continuously stirring to obtain the crude oil dehydration low-temperature demulsifier. The crude oil low-temperature demulsifier prepared in the invention has good universality, and has a good demulsification effect on different crude oils at a low temperature.

The present application provides a kind of biomass synthesis base drilling fluid with clean oil agent, comprising: penetrant 2-15 parts by weight;Complexing agent 5-30 parts by weight;Solubilizer 1-10 parts by weight;Emulsifier 8-30 parts by weight;Water 100 parts by weight;The penetrant is sulfosuccinate and / or polyoxyethylene ether compound;The complexing agent is organic phosphonate and / or hydroxyl carboxylate;The solubilizer is de-aromatic solvent oil;The emulsifier is betaine zwitterionic surfactant.Compared with the prior art, the biomass synthesis base drilling fluid with clean oil agent of the present application uses specific content of components, and each component has good interaction with each other, so that the obtained biomass synthesis base drilling fluid with clean oil agent has good cleaning effect, and because the preferred raw material does not contain aromatic hydrocarbon, it is biodegradable, safe to the environment, and beneficial to environmental protection;And the oil-based drilling fluid clean oil agent preparation method is simple, the conditions are mild, and is suitable for large-scale industrial production.

The invention provides a preparation method of 10-methoxy iminostilbene, and belongs to the technical field of medicines. Alkali metal alkoxide and potassium hydroxide are used as alkali, methanol and aromatic solvent are used as reaction solvents, the reaction time can be shortened, the reaction is fully carried out, the purity and yield of the product are improved, the impurity content is reduced, the post-treatment steps of concentration, water adding for pulping and cooling for devitrification are adopted, the post-treatment process is simple, and the method is suitable for industrial production. The emulsification phenomenon is avoided, and the purity and the yield of the product are further improved. The result of the embodiment shows that when the 10-methoxy iminostilbene is prepared by adopting the preparation method disclosed by the invention, the yield of the 10-methoxy iminostilbene is more than 91% and the content of the impurity iminostilbene is less than 0.1% when the reaction time is 5h.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for treating wastewater from a polyphenyl ether synthesis process and application. The method for treating wastewater from the polyphenyl ether synthesis process comprises the following steps: adding an aromatic solvent to wastewater from the polyphenyl ether synthesis process to perform a first extraction; then adding sodium persulfate to perform a first degradation reaction; adding the aromatic solvent again to perform a second extraction; then adding sodium persulfate to perform a second degradation reaction to obtain wastewater after the second degradation reaction; adjusting the pH of the wastewater after the second degradation reaction to neutral or alkaline, filtering, and completing the wastewater treatment. The present application greatly reduces the COD of the wastewater by re-extracting the oxidation intermediate product, can reduce the COD of the wastewater from the polyphenyl ether synthesis process to below 500 mg / L, and even to 206 mg / L, reduces the wastewater COD by 98.9%, and has the advantages of simple operation, low energy consumption, and green environmental protection.

The application discloses a kind of full solid waste upper layer cold regeneration asphalt mixture and preparation method thereof, the cold regeneration asphalt mixture in each material content is, asphalt pavement recycling material 48-52wt%, waste road concrete 44-48wt%, dilute asphalt 2-3wt%, cold mixing activator 1-1.8wt%, mineral powder 0.5-1wt%, dilute asphalt and cold mixing activator contain D60 de-aromatic solvent oil.The preparation method includes the following steps: preparation dilute asphalt and cold mixing activator;Asphalt pavement recycling material, waste road concrete, mineral powder are placed in oven and dried;First, asphalt pavement recycling material is placed in mixing pot and mixed, then cold mixing activator is added and mixed, then waste road concrete and dilute asphalt are added and mixed, and finally mineral powder is added and mixed, to obtain full solid waste upper layer cold regeneration asphalt mixture.The cold regeneration asphalt mixture prepared by the application has excellent comprehensive performance, can meet the performance requirements of upper layer hot mix asphalt mixture, and realizes high-level utilization.

The invention relates to an epoxy resin waterproof adhesive layer and a preparation method thereof. An epoxy resin monomer and an amine curing agent are used as film forming matters, a dearomatization solvent is used as a dispersing agent, and the dearomatization solvent is at least one of SK410 and SK410B or a mixture of the SK410 and the SK410B or a mixture of at least one of the SK410 and the SK410B and acetone; the moisture absorption rate is adjusted by adjusting the solid content of the waterproof glue solution; the waterproof adhesive layer is low in raw material cost, simple in preparation process, capable of adjusting curing conditions according to specific production conditions, high in maneuverability, capable of effectively reducing the moisture absorption rate after acting on a base material, capable of achieving the moisture absorption rate inhibiting effect of 60%, suitable for surface waterproof operation treatment of composite material products in various fields such as aircrafts and the like, and capable of achieving the waterproof effect after acting on the surface of a heat-proof composite material. The environment storage stability is improved.