393 results about "Ethylbenzene" patented technology

The invention discloses a method for preparing tert-butyl ethylbenzene through alkylation of ethylbenzene and isobutene. In a reactor, a raw material containing ethylbenzene and isobutene is in contact with a catalyst for an alkylation reaction to obtain a product containing tert-butyl ethylbenzene, by changing the proportion of the shell ZSM-12 molecular sieve in the hydrogen-type Beta-coated ZSM-12 core-shell molecular sieve and combining high-temperature water vapor treatment, the obtained catalyst shows excellent catalytic performance in liquid-phase alkylation reaction of ethylbenzene and isobutene. The catalyst preparation process is simple to operate and easy for industrial production. The development of a p-tert-butyl ethylbenzene production technology is favorably promoted.

Methods for upgrading heavy aromatic waste streams, such as polystyrene, to chemical feedstocks are disclosed. The process involves feeding waste streams to a first pyrolysis zone followed by hydrogenation. The hydrogenation effluent is processed to recover ethylene, propylene, benzene, ethylbenzene, or their precursors. Optionally, the effluents are separated into light and heavy streams. The light stream from the first pyrolysis effluent is sent to hydrogenation, while the heavy stream is either removed, recycled to the first pyrolysis zone, or fed to a second pyrolysis zone. The light stream from the hydrogenation effluent is processed to recover the same chemicals, and the heavy stream is similarly managed. If present, the second pyrolysis effluent is separated into light and heavy streams, with the light stream processed to recover chemicals and the heavy stream managed as before.

The invention discloses a method for preparing a single-benzene-ring liquid chemical through solvent-free hydrogenation degradation of polystyrene waste plastics based on a bifunctional catalyst. According to the method, Nb2O5 is taken as a carrier, 1-3wt% of noble metal ruthenium is loaded to prepare a bifunctional catalyst, and high-molecular-weight polystyrene is efficiently degraded into single-benzene-ring liquid chemicals such as benzene, methylbenzene and ethylbenzene through hydrogenation reaction under a solvent-free condition. Precious metal ruthenium hydrogenates a polystyrene long chain to generate a short-chain hydrocarbon intermediate, then a carrier # imgabs0 # acid site drives beta-cracking and hydrogen transfer reaction, and a single-benzene-ring product is directionally generated through the synergistic effect of the short-chain hydrocarbon intermediate and the carrier # imgabs0 # acid site. The method has the advantages of no solvent, reduced equipment cost, high reaction efficiency, simple reaction operation, mild reaction conditions, simple catalyst preparation process, high activity, selectivity and good stability, and is suitable for industrial production, and no other solvents preempt acidic sites. The method not only can realize cyclic utilization of resources, but also can alleviate the current environmental pollution problem.

The invention provides a synthetic method of high-purity p-methylstyrene. The method comprises the following steps: carrying out alkylation on toluene and catalytic dry gas in a modified ZSM-5 catalyst to generate methyl-ethylbenzene, carrying out adsorption separation on the methyl-ethylbenzene to obtain high-purity p-methyl-ethylbenzene, and carrying out high-temperature dehydrogenation on the p-methyl-ethylbenzene in the presence of an iron-based catalyst to obtain the high-purity p-methyl styrene. According to the method, based on the synergistic effect of a preparation process and an alkylation reaction catalyst, the para-selectivity of the alkylation reaction catalyst is strictly controlled, so that the selectivity of the catalyst is ensured, the service life of the catalyst is greatly prolonged, and furthermore, a simulated moving bed is utilized to adsorb and separate methyl ethylbenzene isomers, separate, purify and recycle; the raw material utilization rate and the product purity are improved, and the purity of the finally obtained p-methylstyrene is 99% or above.

The invention discloses a preparation method of a tin oxide-based nanofiber gas sensor array, a temperature regulation and control method and application of the tin oxide-based nanofiber gas sensor array. Firstly, different tin oxide-based nanofiber gas sensors are controllably prepared, and the gas sensing performance is optimized by adopting a temperature modulation technology; and finally, 11 VOCs (n-propanol, n-butanol, ethanol, triethylamine, formaldehyde, acetone, diethyl ether, benzene, toluene, ethylbenzene and m-xylene) gases are identified. According to the dynamic temperature control, the surface adsorption and desorption processes can be obviously influenced by changing the working temperatures of different metal oxide nanofiber sensors, so that the selective recognition of different gas molecules is realized. Besides, by reasonably designing the composition of the sensor array and a temperature control strategy, the characteristic information of different gas molecules can be effectively distinguished, and the accuracy and reliability of gas recognition are further improved.

The invention relates to the technical field of all-solid-state batteries, in particular to air-stable argyrodite type sulfide electrolyte, a preparation method thereof and an all-solid-state battery. The air-stable argyrodite type sulfide electrolyte provided by the invention comprises a sulfide solid electrolyte and a protective layer formed by self-assembly of organic molecules on the surface of the sulfide solid electrolyte, wherein the sulfide solid electrolyte is argyrodite type sulfide solid electrolyte, the general formula of the sulfide solid electrolyte is Li < 7-a > PS < 6-a > X , X is halogen, and a is more than 0 and less than 2; the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene, and the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene. According to the air-stable argyrodite type sulfide electrolyte provided by the invention, the stability of the sulfide electrolyte to water can be enhanced, and the ionic conductivity of the sulfide electrolyte can be ensured.

The invention discloses a potassium-free catalyst and method for preparing p-methylstyrene with a low water-hydrocarbon ratio, the catalyst takes Fe-modified gamma-Al2O3 prepared by an oil column forming method as a carrier, and active metal and auxiliary metal are loaded through autoclave crystallization. Transition metal Fe is introduced in the technological process of preparing the gamma-Al2O3 carrier through a hot oil column forming method, after other metal salts are dissolved in an acid solution, polyethylene glycol and citric acid are added to serve as adhesion promoters, and active metal and auxiliary metal are loaded through a pressurized stirring crystallization method, so that the specific surface area of the catalyst is effectively increased, and the specific surface area of the catalyst is increased. The dispersity of the loaded metal is improved, and the interaction between the metal and the Fe-Al2O3 carrier is enhanced. A methyl ethylbenzene dehydrogenation reaction result of the prepared catalyst shows that a target product can be prepared under the condition that the water-hydrocarbon ratio is as low as 0.8, and the catalyst is good in catalytic performance, high in stability, remarkable in technical and economic effects and beneficial to industrial popularization.

A process for the manufacture of styrene acrylic copolymers having a renewably-sourced carbon content comprises the steps of: a) subjecting a feedstock comprising a renewably-sourced ethanol to dehydration to produce a renewably-sourced ethylene stream; b) subjecting at least a portion of the renewably-sourced ethylene stream to an olefin-interconversion, to obtain a renewably-sourced propylene; the olefin- interconversion comprising (i) and (ii): (i) ethylene dimerization to obtain n-butenes; (ii) metathesis reaction between n-butenes obtained according to (i) and ethylene to obtain propylene; and c) subjecting a portion of the renewably-sourced propylene to an oxidation reaction to produce acrylic acid; d) subjecting a portion of the renewably- sourced propylene to a hydroformylation reaction with syngas to produce n-butyraldehyde; e) subjecting the n-butyraldehyde to hydrogenation to produce n-butanol; f) esterifying acrylic acid obtained in step c) and the n-butanol to produce n-butyl acrylate; g) subjecting ethylene to an alkylation reaction with benzene to produce ethylbenzene; h) subjecting the ethylbenzene to a dehydrogenation reaction to produce styrene; i) copolymerizing the styrene and the n-butyl acrylate to produce a styrene acrylic copolymer. The process has a high renewably-sourced carbon content, in particular an increased renewably-sourced carbon content with respect to the renewably-sourced carbon content available in a cracker-based process.

The invention discloses a preparation method of a catalyst for catalyzing directional polycondensation of acetone to synthesize mesitylene, and belongs to the technical field of catalysis. The modified active metal supported catalyst is prepared from a catalyst carrier prepared by mixing a nitrogen-doped modified carbon carrier or a composite oxide with a molecular sieve, an active metal component, a metal modification additive component and a metal chelating agent. According to the present invention, the active component is loaded on the composite modified carrier through the isovolumetric impregnation method, and the metal modification auxiliary agent component is introduced through the ion exchange method to further modify the active component, such that the requirement of the catalysis of the directional deoxidation trimerization of the acetone to prepare the mesitylene is achieved, and the catalyst prepared by the method has advantages of low price, high activity, high selectivity, good stability and the like; the problem that the separation cost is increased due to the complex equipment requirement and the separation problem of mesitylene and methyl-ethylbenzene under the similar boiling point in the traditional mesitylene production method is avoided.

The invention relates to the technical field of fluorescence detection, in particular to a cadmium-metal-based fluorescent metal organic framework material, a preparation method of the cadmium-metal-based fluorescent metal organic framework material, a fluorescent sensor array and application of the cadmium-metal-based fluorescent metal organic framework material. Fluorescent probe molecules with different proportions can be obtained by changing the doping concentration of rhodamine B, the RhB (at) MOF has an emission peak of Cd-MOF at 430nm and an emission peak of rhodamine B at 570nm, and when the material is in contact with different benzene series solvents, the relative emission intensity of host-guest emission peaks is almost constant, and the material is unique for each RhB (at) MOF, so that the fluorescent probe can be used for detecting the fluorescence of the RhB (at) MOF. Benzene, toluene, xylene and ethylbenzene are specifically distinguished by using different relative emission ratios of host and guest emission peaks, a fluorescent sensing array is constructed to identify benzene series, and fluorescent probe molecules can be prepared into a fluorescent film to realize portable detection.

The invention provides a method for preparing p-chloromethyl styrene, which comprises the following steps: (1) in the presence of a catalyst and an assistant, carrying out reaction on paraformaldehyde and hydrogen chloride to obtain a chloromethylation reagent; (2) reacting beta-halogenated ethyl benzene with the chloromethylation reagent obtained in the step (1) to obtain chloromethyl halogenated ethyl benzene; (3) adding an extracting agent into the chloromethyl halogenated ethylbenzene reaction liquid obtained in the step (2) for extraction to obtain an oil layer containing chloromethyl halogenated ethylbenzene and a water-containing acid layer, and crystallizing the oil layer to obtain purified p-chloromethyl halogenated ethylbenzene; and (4) in the presence of a solvent, carrying out elimination reaction on the purified p-chloromethyl halogenated ethyl benzene and alkali to obtain p-chloromethyl styrene.

The invention relates to a catalyst for preparing acetophenone by efficiently catalyzing selective oxidation of ethylbenzene in a hydrocarbon selective oxidation reaction, especially under a mild condition, a preparation method of the catalyst, and application of the catalyst provided by the invention. According to the catalyst for catalyzing selective oxidation of ethylbenzene to prepare acetophenone, monatomic Fe is anchored on a nitrogen-doped carbon carrier through a Fe-Nx coordination bond, the Fe content is 4-23 wt%, the BET specific surface area is 200-500 m / g, and Fe exists in Fe < + > and Fe < + > valence states. The catalyst can be used for preparing acetophenone through selective oxidation of hydrocarbons and has the advantages of being high in catalytic performance, stable in structure and good in substrate universality.

Fire protection structure, at least comprising or consisting of: a first case and a second case; where the first shell surrounds or encloses an interior space, the interior space is suitable for accommodating a cable, a conduit or a pipe or sections thereof; wherein the first shell contains or consists of at least one aerogel; wherein the second shell surrounds or encloses the first shell; wherein the second shell contains or consists of a material that expands when exposed to heat, preferably a fire-resistant material; wherein the heat-expandable material is expandable graphite, a combination of a first coating material and a primer, or a combination of the first coating material and a second coating material and the primer; wherein the primer contains or consists of a primer, a hardener and a thinner, the primer contains: Xylene (CAS No. 1330-20-7); Hydrocarbons, C9, Aromatics (CAS No. 64742-95-6); Reaction product: Bisphenol-A-epichlorohydrin resins with an average molecular weight of 700 to 1100 (CAS No. 25068-38-6); Butan-1-ol (CAS No. 71-36-3); Trizinc bis(orthophosphate) (CAS No. 7779-90-0); Ethylbenzene (CAS No. 100-41-4); 4-Hydroxy-4-methyl-pentan-2-one (CAS No. 123-42-2); Solvent naphtha (petroleum), lightly flavored (CAS No. 64742-95-6); and Silicon dioxide (CAS No. 7631-86-9); the hardener contains: Hexamethylene-1,6-diisocyanate, homopolymer (CAS No. 28182-81-2); Hydrocarbons, C9, Aromatics (CAS No. 64742-95-6); Hexamethylene-1,6-diisocyanate (CAS No. 822-06-0); Dimethylbis[(1-oxoneodecyl)oxy]stannan (CAS No. 68928-76-7); and n-Butyl acetate (CAS No. 123-86-4); and containing the thinner: Xylene (CAS No. 1330-20-7); Butan-1-ol (CAS No. 71-36-3); Ethylbenzene (CAS No. 100-41-4); and n-Butyl acetate (CAS No. 123-86-4.

The present invention relates to a process for the preparation of a compound of formula (I), a stereoisomer, a salt, a hydrate or a solvate thereof, (II) comprising the step of sulfinylation of a compound of formula (IV) to produce compound of formula (II); (IV) wherein: R1 and R2 are as defined in the claims, wherein said sulfinylation step is performed in the presence of a solvent selected from the group comprising benzene, toluene, ethylbenzene, xylene, chlorobenzene, bromobenzene, fluorobenzene, anisole, nitrobenzene, tetralin, dichlorobenzene, trimethylbenzene, ethylacetate, propylacetate, butylacetate, propanol, butanol, 2- methyltetrahydrofuran, diethylether, methyltertbutylether, cyclopentyl methyl ether, dichloromethane, tetrachloromethane, pentane, hexane, heptane, cyclohexane, decaline and mixtures thereof.

The invention belongs to the field of chemical recovery of waste plastics, and discloses a method for preparing monocyclic aromatic hydrocarbon from styrene derived waste plastics. A catalyst and waste plastics are uniformly mixed and then are loaded into a high-pressure reaction kettle, no extra solvent needs to be added, gas generated by the reaction is collected through a gas bag after the reaction is finished, and a liquid product and residual solids are centrifugally separated. In the method, the catalyst is simple to prepare, low in cost and good in stability, the styrene-derived waste plastics can be efficiently converted into monocyclic aromatic hydrocarbons such as methylbenzene and ethylbenzene under the solvent-free and mild conditions, and the conversion rate can reach 90% or above. According to the method, efficient chemical recovery of the styrene-derived waste plastics is realized, and a solution is provided for recovery and utilization of the styrene-derived waste plastics.

There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene / ethylbenzene mixture, adding the polystyrene / ethyl benzene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

Disclosed is the use of a dividing-wall column in a process for co-producing propylene oxide and styrene monomer. Feed streams to a dividing-wall column comprise a bottoms product produced in recovering crude propylene oxide from an epoxidation reaction product, a hydrogenated byproduct styrene monomer production, and a light fraction of a bottoms product withdrawn from the dividing-wall column. Products from the dividing-wall column comprise an overhead product comprising ethylbenzene for recycle to an oxidation zone, an intermediate product comprising methylbenzyl alcohol and acetophenone as feed to a dehydration zone to produce styrene monomer, and a bottoms product comprising methylbenzyl alcohol and heavy materials.

This invention discloses a catalyst for the alkylation of tert-butanol with styrene to prepare tert-butylethylbenzene and ethylbenzene, its preparation method, and its application. The catalyst consists of a support and active components loaded on the support. The active components are oxides of rare earth metals and high-valence oxides of transition metals. The support is H-β zeolite. The mass contents of the oxides of rare earth metals and high-valence oxides of transition metals on the support are 3-5% and 2-4%, respectively. This invention makes a breakthrough in the reaction mechanism by loading rare earth metals and transition metals onto a β-molecular sieve and using tert-butanol and styrene as raw materials for alkylation. This avoids the polymerization of styrene (raw material) and the dimerization of isobutylene (intermediate product), reduces the generation of by-products, and makes the catalytic process controllable.

A method for preparing ethylbenzene by using nanosheet molecular sieve as catalyst, the hydrogen type nanosheet molecular sieve is broken and loaded into a fixed bed reactor, benzene and ethanol are used as raw materials, nitrogen is used as carrier gas, the reaction is carried out at 280-350 DEG C and 0.1-1.0 MPa; the hydrogen type nanosheet molecular sieve is ZSM-5 molecular sieve, the length of b axis direction is 70-100 nm, the length ratio L b / L a is less than 0.40. The method for preparing ethylbenzene provided by the application can be directly used for catalyzing ethanol and benzene to prepare ethylbenzene without secondary treatment such as modification of acid, alkali and alkali metal and rare earth metal elements based on the special structure of the nanosheet molecular sieve with ultra-short b axis, can ensure that the product is desorbed and diffused from the surface of the catalyst in time, reduces the probability of deep reaction of the product molecules, realizes high selectivity of the product ethylbenzene, and reduces the cracking and other side reactions.

The application provides a C8 aromatic hydrocarbon isomerization catalyst and a preparation method and application thereof. The catalyst contains an active component and a carrier; wherein, based on the weight of the carrier, the carrier contains 5wt%-25wt% of HZSM-23, 5-30wt% of mordenite, 20-60wt% of macroporous alumina and 10wt%-25wt% of a binder component. The method comprises preparation of the carrier and loading of the active metal, wherein the preparation process of the carrier is as follows: HZSM-23 molecular sieve, mordenite, macroporous alumina and a binder are mixed and formed, and the carrier is prepared after drying and calcination. The catalyst is used for C8 aromatic hydrocarbon isomerization reaction, and has the characteristics of high ethylbenzene conversion rate and high xylene yield when the xylene is at an equilibrium concentration.

The invention relates to a method for producing styrene, starting from ethylbenzene, the method in particular involving the process of transferring heat from the obtained product gas flow to an H2O-containing flow. It has been found that the present method for producing styrene allows the heat required to carry out the dehydrogenation reaction to be efficiently recycled, in particular in order to heat the H2O-containing input flow being used.

The invention discloses a photochromic TiO2-PEG200 (Polyethylene Glycol 200) nano particle and an application of the photochromic TiO2-PEG200 nano particle in photocatalytic oxidation of a C-H bond. The catalyst is synthesized through a solvothermal method, PEG200 is used as a solvent and a modifier, and self-doped Ti < 3 + > and surface oxygen vacancies are introduced into TiO2. Under the irradiation of blue light (405nm), the catalyst generates a photochromic effect, Ti < 4 + > is reduced into high-concentration Ti < 3 + > in situ, and meanwhile, a large amount of superoxide free radicals (O < 2 + >) are generated. A photo-generated hole directly activates an ethylbenzene alpha-C-H bond to generate a benzyl free radical, and the benzyl free radical reacts with a superoxide free radical (O2.) and is finally converted into acetophenone. The catalyst has excellent visible light response and charge separation efficiency, and the acetophenone yield is up to 56 mmol.g <-1 >. H <-1 > and is 10 times that of traditional TiO2. The reversible circulation of Ti < 3 + > / Ti < 4 + > enables the catalyst to maintain good stability, and the activity is still maintained at 95% or above after five times of circulation. The operation conditions are mild (room temperature and normal pressure), a strong oxidant is not needed, an efficient, stable and environment-friendly photocatalysis solution is provided for C-H bond activation, and the method has important application value in the field of fine chemical synthesis.

According to the multi-construction layered metal oxide and the application thereof in hydro-conversion of the polystyrene waste plastic pyrolytic oil, the prepared multi-construction layered metal oxide serves as a catalyst and is fully mixed with the polystyrene waste plastic pyrolytic oil after being pretreated, and then the mixture is transferred into a reaction kettle; after sealing, filling hydrogen into the reaction kettle, controlling the reaction temperature to be 90-100 DEG C, and stirring to react for 6-12 hours; according to the invention, the multi-constructed NixAl-LDO is combined with the hydrogenation process, and the styrene conversion rate and ethylbenzene selectivity are improved by utilizing the combined action of the structural advantage of the multi-layer catalyst and the hydrogenation reaction.

The present application belongs to the field of chemical synthesis, and particularly relates to a tert-butyl styrene dehydrogenation synthesis method, which comprises the following steps: carrying out catalytic dehydrogenation reaction on a mixed system containing tert-butyl ethylbenzene, an auxiliary agent, water and an iron-based catalyst at a temperature of 500-600 DEG C, and then separating to obtain tert-butyl styrene; the auxiliary agent is at least one of cyclohexane, cyclohexyl ethane and methylcyclohexane. The process and conditions of the present application can synergistically reduce the isopropyl styrene side reaction in the dehydrogenation process, and help to improve the yield and purity of the tert-butyl styrene.

The application discloses a lanthanum-cobalt composite catalyst and a preparation method and application thereof. The lanthanum-cobalt composite catalyst is composed of La2O2SO4, Co4S3 and Co3O4. Co(NO3)2.6H2O, La(NO3)3.6H2O, urea and sodium dodecyl sulfate are dissolved in an isopropyl alcohol solution to form a reaction solution, a precursor is obtained through a solvothermal method, and the lanthanum-cobalt composite catalyst is prepared through calcination. The prepared catalyst is used for selectively oxidizing ethylbenzene into acetophenone under the condition that molecular oxygen is used as an oxidant and no solvent is used, and excellent catalytic performance is shown. The catalytic system meets the requirements of green chemical industry and sustainable development.

A method and system for dehydrogenating ethylbenzene can include mixing a steam stream and an ethylbenzene stream to form a feed mixture. The ethylbenzene / steam feed mixture can then be fed into a dehydrogenation reactor containing an alkali metal promoted catalyst. A liquid selected from an alkali metal liquid, an alkali metal compound liquid, or a liquid solution containing an alkali metal can be injected into a feed stream (such as the steam stream, the ethylbenzene stream, or the ethylbenzene / steam feed mixture). After injection, the liquid vaporizes and disperses into the feed stream upstream of the dehydrogenation reactor. The liquid can remain liquid from a point upstream of the injection to the injection nozzle. The liquid is dispersed in liquid form through the injection nozzle to form liquid droplets dispersed in the feed stream, which evaporate and / or dissolve into the vapor feed stream.

A process for the manufacture of one or more ethylene-derived chemical(s) having a bio- based carbon content comprises the steps of (a) providing a first ethylene stream by (a-i) providing a cracker feed stream containing bio-naphtha and fossil-based hydrocarbons, (a-ii) subjecting the cracker feed to steam cracking to obtain a cracker effluent, (a-iii) recovering from the cracker effluent the first ethylene stream; (b) providing a second ethylene stream having a bio-based carbon content; (c) combining the first ethylene stream and the second ethylene stream to obtain a combined ethylene stream; (d) converting the combined ethylene stream to at least a first generation ethylene-derived chemical selected from (α) ethylene oxide, (β) ethylbenzene, (y) ethylene dichloride; and (δ) propionaldehyde; and (e) optionally subjecting the first generation ethylene-derived chemical to a chemical conversion or a sequence of chemical conversions to obtain a downstream ethylene-derived chemical. The process allows for efficient operation of the steam cracker while allowing for the production of ethylene-derived chemicals with a predetermined bio-based carbon content.

The present invention provides a method for producing styrene, comprising the following steps: passing reaction raw materials through a plurality of reactors connected in series in sequence to obtain a product; wherein the reaction raw materials include at least ethylbenzene and water; a catalyst II is loaded in the last reactor connected in series, and the relative void ratio of the catalyst II is not less than 1.01, based on the void ratio of the cylindrical catalyst being 1. The method for producing styrene provided by the present invention performs a reaction through a plurality of reactors connected in series, and designs the catalyst in the last reactor so that the raw materials react fully, which can effectively increase the specific surface area of ​​the reaction, and at the same time reduce the bed pressure drop, increase the raw material conversion rate and styrene selectivity, thereby improving the overall reaction effect and the yield of styrene.

The present application relates to the technical field of catalyst preparation, and is a catalyst for producing mesitylene from C9 mixed aromatic hydrocarbons and a preparation method thereof.The former is a non-noble metal supported molecular sieve catalyst, the catalyst carrier comprises a molecular sieve and a binder, the molecular sieve accounts for 70% to 90% of the weight percentage of the catalyst carrier, the loading of each element accounts for 1wt% to 10wt% of the weight percentage of the catalyst carrier, and the total loading of elements accounts for 5wt% to 15wt% of the weight percentage of the catalyst carrier.The catalyst for producing mesitylene from C9 mixed aromatic hydrocarbons has good catalytic performance, is applied to the process of producing mesitylene from C9 mixed aromatic hydrocarbons as a catalyst for alkylation reaction and isomerization reaction, finally eliminates the interference of methyl ethyl benzene, maximizes the production of mesitylene, the content of methyl ethyl benzene is less than 0.5%, and the yield of mesitylene is greater than 25%.

The invention provides polyether sulphone and a preparation method thereof. The preparation method comprises the following steps: mixing a polar aprotic solvent, a bisphenol monomer and an alkaline substance, introducing protective gas, heating, dehydrating, cooling to T1, adding a diphenyl sulfone monomer, and carrying out heat preservation at T1 to carry out a first-stage polymerization reaction; adding a low-polarity solvent, heating to T2, and carrying out second-stage polymerization reaction to obtain polyether sulfone; wherein the low-polarity solvent is selected from one or a combination of more than two of normal hexane, cyclohexane, methylbenzene, ethylbenzene, biphenyl and diphenyl ether. By reducing or partially inhibiting the generation of the cyclic oligomer in the reaction process, the polyarylether sulfone with narrow molecular weight distribution and low content of the cyclic polymer is obtained. The method provided by the invention is simple and easy to implement, is convenient to control, avoids complex product purification and separation processes, and is beneficial to industrial implementation.