76 results about "Aromatic solvent" patented technology

The utility model discloses a heat energy utilization system of a C3 and C4 mixed dehydrogenation device, and relates to the technical field of heat energy utilization. According to the utility model, heat generated by a heat pump compressor is respectively used as a heat source of materials extracted from the side lines of a propane tower reboiler and a C3 and C4 separation tower A, heat of an aromatic solvent pipe system is used as a heat source of the reboiler of the C3 and C4 separation tower A, and heat of materials at the bottom of a C3 and C4 separation tower B is used as a heat source to exchange heat with materials at the inlet of the C3 and C4 separation tower A; surplus heat of the dehydrogenation device is fully utilized, steam consumption is reduced, and the purpose of saving energy is achieved.

A reaction kettle for preparing a high-boiling-point aromatic solvent, comprising a housing (1). A top plate (5) is arranged at the top of the housing (1); a protection ring (6) is fixedly connected to the top of the top plate (5); a motor (12) is fixedly connected to the center of the top of the top plate (5); a rotating rod (13) passes through and is fixedly connected to an output end of the motor (12); uniformly distributed stirring rods (14) are fixedly connected to the front side and the rear side of the outer diameter of the rotating rod (13); arc-shaped scraping plates (21) are fixedly connected to the front side and the rear side of the bottom of the outer ring of the rotating rod (13); scraping plates (20) are fixedly connected to the opposite sides of the stirring rods (14); an annular pipe (4) is fixedly connected to the top of the outer diameter of the housing (1); uniformly distributed branch pipes (19) pass through and are fixedly connected to the inner diameter of the annular pipe (4); and a heating assembly is arranged on the outer ring of the rotating rod (13).

A dispersion, methods of making the same, applications of the dispersion to graphitic material and the resulting coated particles are disclosed. The dispersion includes ≤55% wt. coal tar pitch (softening point 100° C.-95° C.), ≤60% wt. dispersant, and the balance a non-aromatic solvent such as water or alcohol. Pitch particles in the dispersion are preferably ≤10 μm with a distribution of D50<15 μm. The pitch particles are micronized, such as by dry and / or wet milling with the dispersant and aqueous solvent to achieve the desired pitch particle size and distribution. This aqueous dispersion may be mixed with natural or synthetic graphitic material having a diameter of 5-20 μm in a ratio of 5%-30% pitch to graphite, dried and carbonized to form coated particles having a graphitic core at least partially coated by pitch particles.

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 invention provides a cold core box binder and a preparation method thereof, the binder is a two-component binder system, a component I comprises alumina sol particle modified phenolic resin and an aromatic solvent, and a component II comprises polyisocyanate and an aromatic solvent; wherein the aluminum sol particle modified phenolic resin is obtained by adding composite aluminum sol particles into a reaction system of phenol and formaldehyde and carrying out catalytic reaction through a base catalyst. The invention provides a cold core box binder which is combined with a nanoparticle modification technology to develop a high-performance cold core box binder suitable for a high-temperature casting environment.

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.

The disclosure provides a method of producing one or more linear alpha olefins by ethylene oligomerization, the method including contacting ethylene with a catalyst composition in a reaction chamber in the presence of a solvent mixture including at least one aromatic solvent and at least one aliphatic hydrocarbon solvent, wherein the at least one aromatic solvent is present in an amount of about 10% by weight or less, based on the total weight of the solvent mixture, and at a temperature of about 50 °C to about 80 °C; oligomerizing the ethylene to produce one or more linear alpha olefins; and withdrawing an effluent comprising the one or more linear alpha olefins.

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 first object of the present invention is to provide an ultraviolet-sensing member having excellent storage stability and image stability. In addition, a second object of the present invention is to provide a microcapsule, a production method of a microcapsule, a dispersion liquid for forming an ultraviolet-sensing layer, and an ultraviolet-sensing kit. The ultraviolet-sensing member of the present invention is an ultraviolet-sensing member including an ultraviolet-sensing layer containing a microcapsule which contains a photoactivator, a color-forming agent, and an aromatic solvent, in which the aromatic solvent includes an aromatic solvent including a heteroatom and an aromatic solvent including no heteroatom.

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.

The invention belongs to the field of aromatic hydrocarbon extraction, and relates to a device and a method for separating aromatic hydrocarbon and non-aromatic hydrocarbon through pressure swing extractive distillation. The device comprises a hydrocarbon mixture feeding pipeline, a high-pressure extractive distillation tower, a non-aromatic solvent recovery tower, an aromatic solvent recovery tower and a heat exchanger, the hydrocarbon mixture feeding pipeline is sequentially connected with the heat exchanger and the middle part of the high-pressure extractive distillation tower; the high-pressure extractive distillation tower is provided with a raffinate discharging pipeline and an extract discharging pipeline; the raffinate discharge pipeline is connected with the non-aromatic solvent recovery tower, the non-aromatic solvent recovery tower is provided with a recovered solvent discharge pipeline and a non-aromatic discharge pipeline, and the recovered solvent discharge pipeline is connected with the high-pressure extractive distillation tower; the extract discharge pipeline is connected with an aromatic solvent recovery tower, the aromatic solvent recovery tower is provided with a lean solvent discharge pipeline and an aromatic discharge pipeline, and the lean solvent discharge pipeline is connected with a top tray of the high-pressure extractive distillation tower. A pressure reduction facility is arranged on a raffinate discharging pipeline of the high-pressure extractive distillation tower, and a gas phase enters the non-aromatic solvent recovery tower after being subjected to pressure reduction, so that variable-pressure operation of the front tower and the rear tower is realized. According to the invention, low-solvent-ratio extraction can be realized, and the heat exchange area of lean solvent heat extraction equipment can be reduced.

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 present invention discloses a thermal energy utilization system for a C3 / C4 mixed dehydrogenation device, relating to the technical field of thermal energy utilization. The system utilizes the heat generated by a heat pump compressor as a heat source for the propane tower reboiler and the sideline extraction material of C3 / C4 separation tower A, the heat from the aromatic solvent piping system as a heat source for the reboiler of C3 / C4 separation tower A, and the heat from the bottom material of C3 / C4 separation tower B as a heat source for heat exchange with the inlet material of C3 / C4 separation tower A. This system fully utilizes the excess heat of the dehydrogenation device, reduces steam consumption, and achieves energy conservation.

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.

An object of the invention is to provide a film having excellent weatherability. The present invention provides a film comprising: a base layer formed of a thermoplastic resin, and a fluororesin layer laminated to one face of the base layer, wherein the fluororesin layer contains a tetrafluoroethylene resin and a photostabilizer. The present invention also provides a method of manufacturing a fluororesin composition suitable for manufacturing the film. The method of manufacturing comprises a dissolving step in which a photostabilizer is dissolved in ester-based, ketone-based, or aromatic solvent to obtain a solution and a mixing step in which the solution is mixed with a fluororesin comprising tetrafluoroethylene resin.

The present invention describes method of preparation of amides of lactyl lactates of general formula I, where Z denotes to group of RR′—N and R represent alkyl, aryl or H from lactide and the lactide reacts with an aliphatic or aromatic amine with 1 to 100 carbon atoms of general formula RR′NH or with an aliphatic or aromatic ammonium hydrohalide with 1 to 100 carbon atoms of general formula RR′NH·HX, where X is selected from Cl, Br and I in a non-chlorinated organic aliphatic or aromatic solvent or in a melted mixture of lactide under solvent free condition, and when lactide reacts with amine, initiator derived from group of Lewis acids of halides of 4., 12., 13., and 14. group is added.

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.

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 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.