68 results about "Sulfolane" patented technology

The invention provides a liquid sulfur removal agent and a preparation method thereof, and belongs to the technical field of natural gas hydrogen sulfide removal treatment.The liquid sulfur removal agent comprises, by weight, 36-66% of s-triazine derivatives, 5-8% of sulfolane, 2-5% of a pH control agent, 10-12% of a stabilizer, 5-8% of a scale inhibitor, 1-2% of a bactericide and the balance deionized water; wherein the s-triazine derivative is selected from a mixture of hexahydro-1, 3, 5-triacetyl-hexahydros-triazine, 1, 3, 5-triacetyl-hexahydros-triazine and 1, 3, 5-triazinane-2, 4-diketone, and the structural formula of the s-triazine derivative is shown in the description. The liquid sulfur removal agent is high in sulfur removal efficiency, good in corrosion inhibition and sterilization performance and not prone to scaling.

The invention discloses a sodium-ion battery electrolyte and a preparation method thereof, and relates to the technical field of sodium-ion batteries, the electrolyte comprises a sodium salt, a composite solvent, an additive and an auxiliary agent, the sodium salt is formed by compounding sodium bis (fluorosulfonyl) imide, sodium bis (trifluoromethanesulfonyl) imide and modified sodium bis (oxalato) borate, and the composite solvent is formed by compounding sulfolane, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The auxiliary agent is nano-scale ZIF-8, the additive is 1, 3-propylene glycol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, the additive is modified 1, 3-propane sultone, trimethyl phosphate and hydroquinone dimethyl ether, and the auxiliary agent is nano-scale ZIF-8. According to the electrolyte, sodium bis (oxalato) borate is modified after being treated by hydrogen peroxide and has efficient hydrofluoric acid resistance, meanwhile, hydrofluoric acid generated by the reaction of fluorine-containing sodium salt and water in the electrolyte can be specifically removed by utilizing an auxiliary agent of the nano ZIF-8 and a synergistic effect formed by the sodium salt and the auxiliary agent, and damage of the hydrofluoric acid to a negative electrode SEI film is avoided; and the cycle life of the sodium ion battery is prolonged.

The disclosed method for recovering N-methyl pyrrolidone from complex waste liquid includes the following processes: pumping the NMP-containing waste liquid into a rectification one-effect tower after vacuum dehydration in a dehydration tower, condensing and collecting NMP at the top of the tower, and pumping the tower bottom into a rectification two-effect tower; obtaining NMP at the top of the rectification two-effect tower, sending the liquid residue to a depolymerization reactor after evaporation of the gas phase in a thin film evaporator, and condensing and condensing; performing side line extraction on the rectification two-effect tower and injecting sulfolane to extract heavy components, separating after mixing, returning the light phase to the rectification two-effect tower, and sending the heavy phase to a regeneration tower; collecting NMP-water azeotrope at the top of the regeneration tower to return to the dehydration tower, collecting sulfolane at the side line to return to the extraction cycle, and sending the concentrated residue at the bottom to the depolymerization reactor; sending the depolymerization gas obtained from the depolymerization reactor to a quenching tower, sending the cooling liquid of the quenching tower to a light-removing tower, sending the overhead product of the light-removing tower to sewage treatment, and collecting NMP at the tower bottom. The recovery treatment method has reasonable and efficient process flow, and has higher NMP yield for complex NMP-containing waste liquid.

The invention discloses a super capacitor electrolyte and a super capacitor, and relates to the technical field of super capacitors, the super capacitor electrolyte comprises an electrolyte, a solvent and a functional additive; the electrolyte comprises spiro quaternary ammonium tetrafluoroborate and triethyl methyl ammonium tetrafluoroborate; the solvent comprises acetonitrile and sulfolane; the functional additive is a compound with a crown ether structure prepared through a thiol-ene click reaction; the addition amount of the functional additive is 1-10% of that of the solvent. The supercapacitor electrolyte system can resist high voltage and has wide temperature adaptability, that is, the supercapacitor electrolyte system has good high temperature resistance and low temperature resistance, so that the application requirement of a supercapacitor in a complex and severe environment is met.

The application discloses a kind of sodium ion battery electrolyte and preparation method thereof, it is related to sodium ion battery technical field, the electrolyte includes: sodium salt, composite solvent, additive and auxiliary agent, the sodium salt is sodium difluorosulfurylimide, sodium bis-trifluoromethanesulfonimide and modified sodium borate dihydroxide dioxalate compound composition, composite solvent is sulfolane-1,3-propanediol dimethyl ether, dimethyl carbonate, fluoroethylene carbonate and ethyl acetate, additive is modified 1,3-propane sulfone lactone, trimethyl phosphate and hydroquinone dimethyl ether, auxiliary agent is nano ZIF-8.This electrolyte sodium borate dihydroxide dioxalate is modified after hydrogen peroxide treatment, with high-efficiency anti-hydrofluoric acid capacity, while using the auxiliary agent of nano ZIF-8, sodium salt and auxiliary agent form synergistic effect can be targeted to remove hydrogen fluoride sodium salt and moisture reaction generated in electrolyte hydrofluoric acid, avoid the damage of hydrofluoric acid to negative electrode SEI film, and then improve the cycle life of sodium ion battery.

The invention relates to a low-energy-consumption flue gas carbon capture absorbent based on a composite amine solvent and application thereof. The absorbent comprises main amine, auxiliary amine, an accelerant, sulfolane, an antioxidant, a passivator, a stabilizer and water. The mass percent of water in the absorbent is 50%-70%. According to the invention, the absorbent with high water content is covered, the content of main amine in the absorbent is obviously reduced, and the corrosion to equipment is reduced. The antioxidant, the passivator and the stabilizer are added, so that the regeneration energy consumption can be reduced, the viscosity of the absorbent is reduced, and the application scene is expanded.

To provide a solid electrolyte capable of improving ion conductivity.SOLUTION: Wherein the molecular crystal includes a sulfolane-based compound and 112233, - hexafluoropropane-1, 3-disulfonimide lithium (LiCFSA) as a lithium salt, and the inorganic filler is SiO2, A normalized surface area WA (1g / gSE) of the inorganic filler is 15 to m2 / gSE, where W (g / gSE) is a mass of the inorganic filler with respect to m2 of the inorganic filler, and A (900m2 / g) is a specific surface area of the inorganic filler.SELECTED DRAWING: Figure 1

Provided is a method for preparing lactide by one-step reaction of lactic acid, which comprises mixing lactic acid raw material with a solvent and contacting with a catalyst, wherein the solvent comprises solvent I and solvent II, the solvent I is at least one selected from polar solvents such as benzophenone, dihydrolevoglucosenone, N-methylpyrrolidone, trichloropropane and sulfolane, the solvent II is C4-C12 alkane, substituted alkane, aromatic hydrocarbon or substituted aromatic hydrocarbon, the solubility of the solvent II for lactic acid at normal temperature is not more than 1 g lactic acid / 100 g solvent; and the reaction temperature and pressure are such that the solvent I does not boil in the reaction system. The mixed solvent is used as the liquid environment for preparing lactide by one-step reaction of lactic acid, the mixed solvent can be completely miscible with lactic acid in the reaction raw material, on the one hand, it can increase the contact between lactic acid and the solid catalyst, make the reaction more complete, reduce the generation of by-product poly lactic acid, and increase the selectivity of lactide; on the other hand, since the poly lactic acid can also be dissolved in the selected solvent, the adhesion of the poly lactic acid on the catalyst can be reduced, the influence of catalyst deactivation caused by carbon deposition can be reduced, and the service life of the catalyst can be improved.

The invention provides a natural gas desulfurization compound solvent as well as a preparation method and application thereof. The natural gas desulfurization compound solvent is prepared from the following components in parts by weight: 10 to 30 parts of diisohexyltertiary amine, 2 to 10 parts of sulfolane, 15 to 25 parts of N-methyldiethanolamine, 8 to 15 parts of nitrogen-containing heterocyclic compound and the balance of deionized water, and the nitrogen-containing heterocyclic compound comprises N-hydroxyethyl piperazine and / or N-hydroxypropyl piperazine. The bis-iso-hexyl tertiary amine, the N-methyldiethanolamine and the nitrogen-containing heterocyclic compound cooperate to reduce the absorption of carbon dioxide by improving the selectivity of organic sulfur, so that the removal efficiency of the organic sulfur in the natural gas is improved, and finally the purpose of improving the quality of the acid gas is achieved.

The invention relates to the technical field of organic synthesis, and discloses a synthesis process of salicylaldehyde. The process sequentially comprises three core stages: firstly, performing mechanochemical ball milling pretreatment on phenol, a catalytic complexing agent and a molecular sieve drying agent in an inert atmosphere; then, transferring the pretreated mixture into a reactor containing a composite solvent of sulfolane and ionic liquid [BMIM] PF6, and dropwise adding a hexamethylenetetramine solution under programmed temperature control to perform formylation reaction; and finally, cooling the reaction liquid, filtering, hydrolyzing the filtrate by using a phosphoric acid aqueous solution with gradient concentration, and separating the product in real time through azeotropic distillation. According to the process, mechanical activation, composite solvent and programmed reaction are combined, the process is continuous, and the reaction efficiency and selectivity are improved.

The invention provides a continuous extractive distillation separation method of a p-xylene-propanol azeotropic mixture, and belongs to the technical field of separation. According to the method disclosed by the invention, any two of dibutyl phthalate, N-methyl pyrrolidone and sulfolane are used as extracting agents. The method comprises the following steps: adding a mixed raw material solution of p-xylene and propanol into an extraction tower, then adding an extraction agent, carrying out extractive distillation, extracting a propanol product from the top of the tower, introducing an extraction tower bottom product containing the extraction agent and p-xylene into a solvent recovery tower, and after distillation, extracting a p-xylene product from the top of the tower and discharging the extraction agent from the bottom of the solvent recovery tower; and introducing the extraction agent into the extraction tower for cyclic utilization. The method provided by the invention realizes the separation of the p-xylene-propanol azeotropic mixture, has high separation efficiency, is easy to regenerate and is environment-friendly, and the mass fraction of p-xylene in the separated propanol can be greater than or equal to 99.9%.

A method for solid removal from slurry oil, and a method for solid removal and impurity removal from slurry oil. The method for solid removal from slurry oil comprises: (1) bringing an organic solvent in contact with a catalytic slurry oil to perform extraction, so as to obtain an upper raffinate phase 1 and a lower extract phase 1, wherein the mass ratio of the organic solvent to the catalytic slurry oil is not less than 0.5; and (2) removing solids and the organic solvent from the raffinate phase 1 to obtain a raffinate oil, and returning the removed organic solvent back to step (1) for extraction. The organic solvent is selected from one or more of furfural, DMF, N-methylpyrrolidone, dimethyl sulfoxide and sulfolane. The method can achieve the combined effect of deep solid removal from the slurry oil and enrichment of aromatics in the slurry oil, and can effectively enhance the comprehensive utilization value of the slurry oil. The method avoids the technical problem of low utilization rate of the effective components in the slurry oil caused by some useful components of the slurry oil also being removed while removing solid particles. Thus, the method increases the operation cycle of the slurry-oil solid removal technique and reduces energy consumption, thereby facilitating the amelioration of the technical problem of large-scale industrial application.

A solid electrolyte containing a molecular crystal, and an inorganic filler, wherein: the molecular crystal contains a sulfolane-based compound, and 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium (LiCFSA) as a lithium salt; the inorganic filler is SiO2; and assuming that a mass of the inorganic filler per g of the solid electrolyte is W (g / gSE) and that a specific surface area of the inorganic filler is A (m2 / g), a normalized surface area WA (m2 / gSE) of the inorganic filler is 15 to 900 m2 / gSE.

The present application provides a BOG helium extraction method and system, and a MOF slurry absorbent and a preparation method thereof. The absorbent comprises 20-40wt% of a metal organic framework material and 60-80wt% of an organic solvent; the metal organic framework material comprises at least one of HKUST-1, CALF-20, ZIF-67 and ZIF-8; and the organic solvent comprises at least one of dimethyl phthalate, 1,3-dimethyl-2-imidazolinone, N-methyl pyrrolidone, sulfolane and methylcyclohexane. The BOG helium extraction method comprises: pretreating BOG raw gas to obtain He and N2 mixed gas; and under specific temperature and pressure conditions, contacting the He and N2 mixed gas with a volume ratio of 15-30:1 with the MOF slurry absorbent to obtain He. The technical scheme of the present application realizes efficient BOG absorption-adsorption separation and helium extraction under mild temperature and pressure conditions.

The invention relates to the technical field of gas purification and chemical catalysts, and discloses a preparation method and application of a carbon-based sulfur hydrolysis catalyst, and the preparation method comprises the following steps: preparing the carbon-based sulfur hydrolysis catalyst from sulfolane, monopropanolamine, tripropanolamine and water through temperature-controlled mutual dissolution and precise filtration; the application method of the carbon-based sulfur hydrolysis catalyst comprises the following steps: spraying the carbon-based sulfur hydrolysis catalyst into an absorption tower, and constructing a double-temperature area in the absorption tower; maintaining high temperature in the lower area of the absorption tower, and catalyzing carbon disulfide and carbon sulfide to hydrolyze by utilizing monopropanolamine; the upper area of the absorption tower is kept at low temperature, tripropanolamine is used for absorbing hydrogen sulfide and carbon dioxide, the carbon-based sulfur hydrolysis catalyst absorbing gas is conveyed to a desorption tower, hydrogen sulfide and carbon dioxide are desorbed through high temperature and negative pressure to serve as product gas, and a regenerated solution is recycled. The method provided by the invention solves the contradiction between carbon disulfide hydrolysis and product absorption, and realizes conversion and resource recovery of organic sulfur.

The invention belongs to the technical field of gas absorption and separation, and discloses a phase separation rate adjustable method-ethanol accelerant which comprises 5mol / L of monoethanolamine, 5mol / L of sulfolane and water as a solvent. The phase splitting speed is obviously increased; the phase splitting time is 32 minutes and 50 seconds before the absolute ethyl alcohol is not added, and the phase splitting time is 6 minutes and 9 seconds after the absolute ethyl alcohol with the volume fraction of 5 percent is added; the method is suitable for different temperatures and concentration ratios, energy loss is reduced, and the method has a good industrial application prospect.

The invention belongs to the field of electrochemical energy, and particularly relates to a sodium ion battery electrolyte and a sodium ion soft package battery thereof. The sodium-ion battery electrolyte is mainly composed of a sodium salt, a sulfone organic solvent, a dilution additive and a film-forming additive, wherein the sulfone organic solvent comprises sulfolane, 3-methyl sulfolane, dimethyl sulfone, ethyl methyl sulfone and fluoro sulfolane; the diluting additive is prepared from perfluorotributylamine, 3-perhexafluoro-1, 2-epoxypropane, 3-perfluorooctyl-1, 2-epoxypropane, 3-perfluorodecyl-1, 2-epoxypropane, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether, and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether, and the diluting additive is prepared from perfluorotributylamine, 3-perhexafluoro-1, 2-epoxypropane, 3-perfluorooctyl-1, 2-epoxypropane, 3-perfluorooctyl-1, 2-epoxypropane, 3-perfluorooctyl-1, 2-epoxypropane, 3-perfluorodecyl-1, 2-epoxypropane, 1, 1, 2, 2-tetrafluoroethyl-2, 2 Compared with the traditional carbonic ester electrolyte, the sulfone solvent has a wide voltage window, can improve the energy density of the sodion soft package battery, and has higher viscosity when being independently used. The diluting additive can reduce the viscosity of the sulfone solvent to 0.6-1.2 mPa.s, which is close to the viscosity of a chain carbonate solvent, so that the dissolution of the sodium salt in the solvent is promoted, and the sulfone solvent is well applied.

This disclosure provides a method for treating sulfolane waste liquid, wherein the sulfolane waste liquid is mixed with a photocatalyst and then subjected to a dark reaction and a photocatalytic reaction sequentially; wherein the photocatalyst is a BiPO4 / C3N4 composite photocatalyst. This method is green, energy-saving, simple, and efficient, and can convert sulfolane in the sulfolane waste liquid into sulfolane and sulfuric acid under normal temperature and pressure conditions without the addition of external organic reagents. In this method, sulfolane is directly released in gaseous form, reducing the time and energy costs associated with waste liquid separation; small molecule organic pollutants in the sulfolane waste liquid are degraded under photocatalysis, leaving only the sulfuric acid generated in the reaction and a small amount of the original inorganic salts after degradation.

The application discloses a method for synthesizing polyether sulfone resin, and specifically comprises the following steps: adding solvent cyclobutane sulfone into a reactor provided with a nitrogen gas pipe, a gas distributor, mechanical stirring and a water separation condensing device, starting stirring, and adding monomer 4,4'-dichlorodiphenyl sulfone, bisphenol S and a salifying agent; after nitrogen replacement, the nitrogen flow is adjusted, and the temperature is raised to 210-240 DEG C; the gas distributor is used for distributing nitrogen, the system is continuously bubbled by nitrogen flow for dehydration, and the reaction is carried out for 3-5 hours; the nitrogen is turned off, the polymerized mucus is poured into water for precipitation, and the polyether sulfone resin is obtained through the steps of crushing, washing and drying. The application uses high-purity nitrogen flow for dehydration, thus avoiding the addition of flammable and toxic organic water-carrying agents, improving operation safety, not polluting products, and being simple in operation and short in reaction period.

The invention relates to a beneficiation method for ilmenite and associated minerals, and belongs to the technical field of ilmenite beneficiation. The method comprises the following steps: S1, carrying out pre-flotation on associated sulfides, and carrying out flotation on the sulfides under a weakly alkaline condition by taking sulfolane as a sulfide collecting agent; s2, oxidizing and activating the surface of the ilmenite; s3, ilmenite roughing; and S4, ilmenite concentration. According to the method, efficient and green separation of ilmenite, associated sulfide and titanaugite is achieved through the process combination of sulfide pre-floating of the sulfolane sulfur-free collecting agent, sodium hypochlorite-sodium persulfate synergistic oxidation activation and N-phenylthiobenzamide-sodium oleate combined collecting, and the method has industrial application and popularization prospects. The problems that in the prior art, sulfide flotation is conducted through xanthate collecting agents, sulfide removal is not thorough, and residual sulfide interferes with ilmenite flotation are solved.

The invention relates to the technical field of degraded sulfolane treatment, and discloses a degraded sulfolane dechlorination purification treatment method and a degraded sulfolane dechlorination purification treatment system.The method comprises the steps that the pH of degraded sulfolane is measured; when the pH value of the degraded sulfolane is less than or equal to 7, enabling the degraded sulfolane to sequentially flow through a first resin column and a second resin column; flowing the degraded sulfolane through a second resin column when the pH of the degraded sulfolane is greater than 7; wherein the first resin column is filled with weakly alkaline anion resin, and the second resin column is filled with strongly alkaline anion resin. According to the method, the degraded sulfolane selectively passes through the resin column filled with different anion exchange resins according to the pH value of the degraded sulfolane, the process route is flexible to regulate and control, the operation is simple, the regeneration period of the resin of the resin column can be obviously prolonged, and the wastewater discharge amount of resin regeneration is obviously reduced.

The present application relates to the technical field of hydrogen sulfide removal from natural gas, and provides a liquid desulfurization agent and a preparation method therefor. The liquid desulfurization agent disclosed in the present application comprises, in percentage by weight, 36-66% of an s-triazine derivative, 5-8% of sulfolane, 2-5% of a pH control agent, 10-12% of a stabilizer, 5-8% of a scale inhibitor, 1-2% of a biocide, and a balance of deionized water, wherein the s-triazine derivative is a mixture of hydroxyethylhexahydro-s-triazine, 1,3,5-triacetylhexahydro-s-triazine, and 1,3,5-triazinane-2,4-dione. The liquid desulfurization agent of the present application has high desulfurization efficiency, good corrosion inhibition and biocidal performance, and is not prone to scaling.

A composite solvent for separating styrene from a hydrocarbon mixture, comprising 35-80 mass% of a main solvent and 20-65 mass% of a cosolvent, wherein the main solvent is sulfolane, and the cosolvent is 1,3-dimethyl-2-imidazolidinone and / or gamma-butyrolactone. The composite solvent can be used as an extractant to separate styrene from a hydrocarbon mixture by extractive distillation, which can effectively reduce the operating temperature of the extractive distillation column, reduce the polymerization of styrene, reduce energy consumption, and obtain high yield and purity of styrene.

This invention discloses a continuous method for preparing 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid based on a cascaded process of cyclization-de-alcoholization-scraped membrane fluorination, belonging to the field of continuous synthesis technology in fine chemicals. The method includes: cyclizing ethyl 2-ethoxymethylene-4,4-dichloroacetoacetate with methylhydrazine in a loop reactor with forced external circulation, controlling the circulation ratio boundary at 15:1 to 18:1 to improve the selectivity of the target isomer; continuously removing at least some ethanol from the cyclized liquid and adding sulfolane for solvent replacement, ensuring that the ethanol content in the system before entering the fluorination stage is no higher than 1.0% (wt) and the water content is 0.1-0.2% (wt); subsequently, the resulting intermediate material, along with anhydrous potassium fluoride and 18-crown-6 to form a heterogeneous slurry, is fed into a vertical scraped membrane reactor, with a residence time strictly controlled at 169-171°C for 80-100 seconds, and rapid cooling within 3 seconds after discharge; finally, the target product is obtained through hydrolysis and acidification. This specific combined process can achieve high 1,3-isomer selectivity, high fluorination conversion, low aldehyde byproduct levels, and good long-term continuous operation stability without separating the cyclization intermediate.

The application discloses a non-ionic surfactant removing agent and a preparation method and application thereof. The removing agent is a porous polymer microsphere loaded with boric acid in a pore channel, and is obtained by suspension copolymerization of an acrylate monomer, an aliphatic diene crosslinking agent and a porogen in water, and then soaked in a boric acid solution to load boric acid. The removing agent has high selectivity to non-ionic surfactants and sulfolane, and can realize removal of non-ionic surfactants in a desulfurization solution containing sulfolane. Specifically, the active component boric acid in the pore channel of the porous polymer microsphere can be complexed with the entering non-ionic surfactants, and cannot be complexed with sulfolane, so that selective adsorption of the two is realized, deep removal of the non-ionic surfactants in the sulfolane is realized, the loss rate of the sulfolane is low, and meanwhile, new impurities are not introduced after removal of the non-ionic surfactants in the sulfolane.

The invention provides a sulfuryl local high-concentration electrolyte matched with a silicon monoxide negative electrode of a lithium ion battery, the sulfuryl local high-concentration electrolyte comprises a lithium salt and a solvent, the lithium salt is at least one of lithium bis (trifluoromethane) sulfonimide (LiTFSI) and lithium difluoro (oxalato) borate (LiDFOB); the solvent is sulfolane, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether, and fluoroethylene carbonate, and the solvent is a mixture of a solvent and a solvent; the concentration of the lithium salt is 1 to 1.5 mol / L. According to the invention, the problem of poor compatibility between the traditional commercial carbonate-based electrolyte and the silicon monoxide negative electrode can be solved. Specifically, the organic-inorganic proportion of the silicon monoxide negative electrode interface solid electrolyte membrane (SEI) can be accurately regulated and controlled, so that the SEI has both a strong-toughness organic phase and a high-strength inorganic phase. And the electrolyte can form a high-energy bond and a sulfur-containing compound, so that the passivation effect of a positive electrode electrolyte interface can be improved. And the high-voltage stability is very excellent, and the excellent electrochemical performance can be shown under 4.5 V high-voltage operation.

The application discloses a kind of high dispersion stability ultra-low structure carbon black material and its application.The material is prepared by the reaction of 3,4-dihydroxyphenethylamine, carbonyl coupling agent, N,N-dimethyl-1,3-propanediamine and 1,3-propane sulfolane to obtain a reactive low-melting micro-phase auxiliary agent, which is then dispersed in ethylene tar after compounding with urea and choline acetate, and is prepared by incomplete combustion, quenching, elution and homologous stabilization treatment. The application utilizes the micro-phase isolation effect of the composite micro-phase auxiliary agent during the formation of carbon black, reducing the branching degree of carbon black aggregates; and through post-treatment, a stable layer containing catechol / quinoxaline anchoring structure and sulfobetaine hydration structure is formed, improving the water-based dispersion stability of carbon black. The obtained carbon black material has the advantages of low structure, low metal residue, narrow particle size distribution and good anti-settling property, and can be used in water-based paint, water-based ink, water-based conductive paste and water-based polymer composite.

The invention discloses a method and a system for separating and removing benzene from a benzene selective hydrogenation reaction product. The method comprises the following steps: introducing benzene selective hydrogenation reaction slurry and a lean solvent containing sulfolane and water into an extractive distillation tower for benzene extraction separation to obtain an alkane olefin product which flows out from the top of the extractive distillation tower; the benzene-containing lean solvent flows out of the tower kettle of the extractive distillation tower and then is introduced into a solvent recovery tower for distillation separation of benzene and sulfolane, benzene flows out of the tower top of the solvent recovery tower, sulfolane flows out of the tower kettle of the solvent recovery tower and then is divided into two parts, one part is directly recycled for benzene extraction separation, and the other part is directly recycled for sulfolane separation. Introducing the other part of sulfolane into a solvent regeneration tank for distillation and purification, and returning the purified sulfolane to the tower kettle of the solvent recovery tower; the alkane olefin product is directly used for a technology for preparing cyclohexanone through cyclohexene esterification and hydrogenation. The alkane olefin product obtained by the method is high in purity, low in benzene content, simple in process, low in cost, green and environment-friendly, and the provided adaptive system meets the continuous production requirement and is suitable for industrial application.

The invention belongs to the field of petrochemical engineering extraction separation, and provides a sulfolane-based extraction agent ternary inhibition composition and a preparation method thereof. According to the invention, a ternary synergistic inhibition design of compounding 10-200ppm of B1 derived polymer micelle intermediate I dispersoid, 20-200ppm of aromatic amine component and 50-200ppm of benzotriazole component on the basis of a sulfolane extraction agent is adopted, and through the synergistic effect of selective enrichment of polymer micelles on the metal surface, acid catching of aromatic amine and passivation of benzotriazole, the metal surface corrosion resistance of the metal surface is improved, and the metal surface corrosion resistance of the metal surface is improved. The performance that the corrosion rate of carbon steel is reduced by not less than 70% and the acid value is not higher than 0.01 mgKOH / g during long-term operation under the ppm-level extremely low addition amount is achieved, the contradiction between the strong dissolving capacity of a high-polarity extraction agent and low-corrosivity long-term protection is solved, the problem of balance of extremely-low-solid-content microstructure stability and long-period acidification resistance is solved, and the extraction efficiency is improved. The method has wide application value in industrial extraction processes such as aromatic hydrocarbon extraction, lubricating oil refining and acid gas removal.

The invention discloses a binder for a high-performance diaphragm, a preparation method of the binder and the diaphragm using the binder, and belongs to the technical field of secondary batteries. The binder is composed of sulfonated polyaromatic polymer salt, raw materials of the binder comprise a polymer, a sulfonating agent and a neutralizer, and the polymer comprises polyether-ether-ketone, polyaryletherketone, polyphenyl ether, polyimide and aromatic and semi-aromatic polyamide; the preparation method comprises the following steps: dissolving at least one of the polymers in sulfolane; adding a sulfonating agent for sulfonation reaction; slowly dropwise adding a neutralizing agent for neutralization and salification precipitation; and finally, carrying out fine purification through dialysis filtration or gradient solvent washing, and reducing the residual quantity of sulfolane to 100 ppm or below. The binder is low in molecular weight degradation rate, is applied to a ceramic coating diaphragm and is synergistically applied with sulfolane or a high-voltage electrolyte, so that the thermal stability, the oxidation stability and the rate capability of a battery can be remarkably improved, and the binder is particularly suitable for a high-voltage lithium / sodium battery system of 4.5 V or above.