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According to the classical definition, a superacid is an acid with an acidity greater than that of 100% pure sulfuric acid, which has a Hammett acidity function (H₀) of −12. According to the modern definition, a superacid is a medium in which the chemical potential of the proton is higher than in pure sulfuric acid. Commercially available superacids include trifluoromethanesulfonic acid (CF₃SO₃H), also known as triflic acid, and fluorosulfuric acid (HSO₃F), both of which are about a thousand times stronger (i.e. have more negative H₀ values) than sulfuric acid. Most strong superacids are prepared by the combination of a strong Lewis acid and a strong Brønsted acid. A strong superacid of this kind is fluoroantimonic acid. Another group of superacids, the carborane acid group, contains some of the strongest known acids. Finally, when treated with anhydrous acid, zeolites (microporous aluminosilicate minerals) will contain superacidic sites within its pores. These materials are used on massive scale by the petrochemical industry in the upgrading of hydrocarbons to make fuels.
Cooperative treatment and resource utilization process for CO2 in industrial solid waste and tail gas
The invention provides a collaborative treatment and resource utilization process for CO2 in industrial solid waste and tail gas, and belongs to the technical field of environmental protection. According to the method, carbon residues in the gasified slag are used as a catalyst, and aluminum and silicon are extracted through the gasified slag chemical method under the polybasic acid aqua regia effect and the electrochemical effect. According to the method disclosed by the invention, a stack retting neutralization mode is adopted, so that the superacid and aluminum and iron oxides in the ash residues are converted into soluble salts, and ferric hydroxide, aluminum hydroxide and polybasic acid ammonium are sequentially replaced from a salt solution by virtue of an ammonia replacement method, so that the use safety risk of high oxidability of polybasic acid is overcome; rapid crystallization of the aluminum salt solution in the form of aluminum chloride is promoted by using the same ion effect; performing stack retting neutralization reaction on the slag charge and sodium hydroxide to generate sodium silicate, introducing carbon dioxide to obtain silicic acid and sodium carbonate, and reacting the sodium carbonate solution with calcium hydroxide to obtain sodium hydroxide. The sodium hydroxide, the polyatomic acid, the ammonia gas and the activated carbon are recycled for treating the fly ash and the coal gangue, so that the comprehensive utilization of multi-element solid waste is realized.
Owner:崔怀奇
Mesoporous bifunctional catalyst, preparation method and application thereof, and preparation method of dicyclohexylbenzene
ActiveCN117358287BMolecular sieve catalystsHydrocarbon by addition and hydrogenationMolecular sievePtru catalyst
The present invention relates to the field of catalyst technology, and more specifically to a mesoporous bifunctional catalyst, its preparation method, and application, and a method for preparing dicyclohexylbenzene. The mesoporous bifunctional catalyst has an average pore diameter of 5 nanometers or greater and contains at least 100 μmol / g of strong acid centers. The mesoporous bifunctional catalyst comprises: 10-30% by weight of an acidic silica-alumina composite; 50-65% by weight of an MCM-41 molecular sieve; 5-10% by weight of a solid superacid; and 1-15% by weight of a hydrogenation metal component. The mesoporous bifunctional catalyst has high catalytic activity and is used to prepare dicyclohexylbenzene, achieving high dicyclohexylbenzene yields and low reaction energy consumption.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Ionic liquid compositions for selective removal of sodium and potassium from lithium-containing aqueous solutions
PCT designated stage expiredWO2025183663A3Organic chemistryLiquid solutions solvent extractionImidePotassium ions
A method for selectively removing sodium or potassium from an alkaline lithium-containing aqueous solution, the method comprising: (i) contacting the alkaline lithium-containing aqueous solution with a hydrophobic solution comprising: (a) an aqueous-insoluble hydrophobic solvent, (b) a protic ionic liquid of the formula X-Y+, wherein X- is a conjugate base of a superacid and Y+ is a protonated cation, and (c) at least one of lipophilic sodium-selective and potassium-selective complexing ligands, wherein the contacting step results in selective complexation with and removal of sodium and / or potassium ions from the lithium-containing aqueous solution into the hydrophobic solution along with simultaneous abstraction of a proton from Y+ to form Y; and (ii) separating the aqueous solution from the hydrophobic solution, wherein, in some embodiments, X- is a bis(sulfonyl)imide and Y+ is a protic ammonium species. The method may further include stripping sodium and potassium ions from the hydrophobic solution and regenerating Y+.
Owner:UT BATTELLE LLC +3
Supported catalyst as well as preparation method and application thereof
PendingCN121869466ACarboxylic acid halides preparationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystEthyl group
The invention discloses a supported catalyst and application thereof in synthesis of difluoroacetyl fluoride, the supported catalyst comprises a carrier and active components, the active components comprise superacid and an active auxiliary agent; in the supported catalyst, the loading capacity of the superacid is 20 wt%-25 wt%, and the loading capacity of the active auxiliary agent is 5 wt%-10 wt%; the superacid is selected from at least one of fluoboric acid, fluorosulfonic acid, fluoroantimonic acid and carborane acid; the active auxiliary agent is selected from at least one of molybdenum nitrate, technetium nitrate, ruthenium nitrate, rhodium nitrate and chromic nitrate; when the supported catalyst is used for synthesizing difluoroacetyl fluoride, 1, 1, 2, 2-tetrafluoroethyl ethyl ether is used as a raw material, hydrogen fluoride is added under the action of the supported catalyst to inhibit generation of ethylene, and difluoroacetyl fluoride and fluoroethane are generated through cracking under relatively mild conditions; compared with an existing preparation method, the conditions are milder, and the one-way yield is larger than 95%.
Owner:浙江禾本科技股份有限公司
Crystalline CTF material and gas-solid phase interface catalytic preparation method
PendingCN120209305AOrganic-compounds/hydrides/coordination-complexes catalystsHydrogen productionPtru catalystCrystallinity
The invention belongs to the field of CTF materials, and particularly relates to a crystalline CTF material and a gas-solid phase interface catalytic preparation method. The preparation method comprises the following steps: 1) reacting a cyano monomer with gas-phase organic superacid to obtain a protonated CTF material; and 2) reacting the protonated CTF material obtained in the step 2) with alkali for deprotonation to obtain the CTF material. The invention provides a method for preparing a high-crystallinity CTFs framework material through organic superacid gas-solid phase interface catalysis. According to the present invention, the cyano monomer and the organic superacid are subjected to gas-solid phase contact, such that the gaseous organic superacid is adopted as the catalyst to catalyze the cyano monomer polymerization so as to obtain the crystalline product at the low temperature within the short time, and the 20 g-grade high crystallinity sample can be rapidly prepared by using the method, the composite material is applied to the field of hydrogen and oxygen production through photocatalytic complete water splitting, and shows excellent performance.
Owner:TIANJIN UNIV
Method for catalytically synthesizing large-size single crystal covalent triazine framework by using mercury-based quantum dot dynamic interface
The invention relates to a method for catalytically synthesizing a large-size single crystal covalent triazine framework (CTF) by using a mercury-based quantum dot dynamic interface. According to the method, the efficient catalytic synthesis of the aromatic dinitrile monomer is realized through the dynamic action of the mercury-based quantum dots at a superacid liquid-liquid interface. The preparation method comprises the following specific steps: firstly, dispersing aromatic dinitrile monomers and oleic acid coated mercury-based quantum dots in an organic solvent to form a precursor dispersion liquid; then slowly injecting the solution into superacid to form a clear liquid-liquid two-phase interface; under the conditions of proper temperature and rotating speed, inducing the monomers to be orderly assembled and grow through active species released by the mercury-based quantum dots; and finally, cleaning and drying to obtain the large-size CTF single crystal with high crystallinity. According to the method, the soft template effect of the mercury-based quantum dots and a super-acid enhanced reversible error correction mechanism are utilized, so that the nucleation entropy change can be effectively inhibited, and the crystal quality can be improved.
Owner:SHAOXIN LABORATORY
A solid superacid catalyst, its preparation method and use
The application discloses a solid superacid catalyst and a preparation method and application thereof, and relates to the technical field of catalysts, and specifically discloses the preparation method of the solid superacid catalyst, which comprises the following steps: dissolving a zirconium source, a titanium source, silica sol, urea and hexadecyl trimethyl ammonium bromide in water to prepare a precursor solution; heating the precursor solution to react, wherein the pH value of the system is increased from acidity to alkalinity during the reaction, and a reaction slurry is obtained; performing hydrothermal aging treatment on the reaction slurry, and then collecting the obtained precipitate; treating the precipitate with a rare earth salt solution to obtain a rare earth modified product; immersing the rare earth modified product in a sulfuric acid solution; and performing calcination on the immersed product to obtain the solid superacid catalyst. The solid superacid catalyst provided by the application has a regular sheet-like morphology and a composite structure of silica-rare earth synergistically anchoring sulfate, can guarantee high catalytic activity, realize strong anchoring of active components and rapid separation of the catalyst, and significantly improves the recycling stability.
Owner:JIANGSU KANGHUI NEW MATERIALS TECH CO LTD
Process for producing hydro(chloro)fluorocarbon compounds
A process is provided which includes contacting a haloalkane reactant with a fluorination agent in the liquid phase, in the presence of a catalyst, under conditions which are free of or substantially free of a superacid, to produce a product stream including a haloalkane product, preferably a hydro(chloro)fluorocarbon.
Owner:THE CHEMOURS CO FC LLC
Corona shielding strip for a high-voltage rotating electrical machine
ActiveUS12374950B2Windings insulation materialPlastic/resin/waxes insulatorsPolymer scienceElectric machine
Various embodiments of the teachings herein include a corona shielding tape for further processing to give an insulation system comprising an impregnated winding with potential control via outer corona shielding “AGS” and / or internal potential controller “IPS” and / or terminal corona shielding “EGS”, the insulation system being producible by impregnating the winding with an anhydride-free and resin-based impregnating agent at 45-85° C. and under reduced pressure. The corona shielding tape may include: a carrier tape; an electrically conductive and / or partly conductive filler in a polymer matrix; and a tape accelerator suitable for curing and / or gelation of the impregnating agent. The polymer matrix contains at least one polyvinylalcohol and / or a polyvinylalcohol copolymer. The accelerator is selected from the group consisting of: superacids and superacid salts suitable for acceleration of a cationic homopolymerization of the resin-based anhydride-free impregnating agent.
Owner:INNOMOTICS GMBH
A process for the preparation of hexamidines
The application discloses a preparation method of hexamidine. The preparation method is as follows: 1,6-(p-cyanophenyl) hexane diether (I) is subjected to alcoholysis reaction with alcohol under the catalysis of a solid superacid, and after the reaction, compound (II) is obtained; the solid superacid is removed through filtration, then ammonia is directly added into the filtrate to generate aminolysis reaction, and hexamidine shown in formula (III) is prepared. The solid superacid is selected to replace traditional acid and alkali, the solid superacid can be recycled for multiple times, the reaction process is simple, green and environment-friendly, the yield is high, and the method is suitable for large-scale industrial production.
Owner:华烁医药科技(黄冈)有限公司 +1
Silane modified polyether sealant
PendingCN121064772ANon-macromolecular adhesive additivesMacromolecular adhesive additivesPolymer sciencePtru catalyst
The invention provides a silane modified polyether sealant. The sealant is prepared from components including silane modified polyether resin and a coupling agent, the mass ratio of the silane modified polyether resin to the coupling agent is 100: (1-3); the preparation method of the coupling agent comprises the following steps: under the protection of nitrogen, mixing ether, a first catalyst and epoxy silane, reacting at 55-65 DEG C for 2-3 hours, removing alcohol, distilling at 100-110 DEG C and 0.06-0.04 MPa until no bubbles are generated, adding an amino silane coupling agent, reacting at 70-80 DEG C until the viscosity of the system is not obviously increased, cooling and filtering; the first catalyst is organic tin lewis acid, sodium alkoxide, potassium alkoxide, solid superacid or solid alkali. According to the invention, only a small amount of the coupling agent obtained by a specific preparation method is needed, so that the bonding strength and the light transmittance of the sealant can be improved while the elastic recovery rate of the sealant is not reduced and the low VOC release is ensured.
Owner:江西晨光新材料股份有限公司
An integrated process for preparing bio-jet fuel from waste oil by coupling solid acid pre-esterification with hydrodeoxygenation
The application discloses an integrated process for preparing bio-jet fuel by converting waste oil through coupling solid acid pre-esterification and hydrodeoxygenation, and belongs to the technical field of bio-jet fuel, wherein the process is characterized in that: first, in-situ removal of esterification water is realized by using a molecular sieve shape-selective adsorption under the action of a bifunctional catalyst composed of WO3 / ZrO2 super acid and 3A molecular sieve, so as to promote the balance conversion; then, the outlet material is directly introduced into a hydrodeoxygenation reactor with NiW / ZrO2-Al2O3 as a water-resistant catalyst without any intermediate separation, so as to realize long-period stable operation. In conclusion, the traditional deacidification section is omitted, the total liquid hydrocarbon yield is more than 94%, and the single-pass life of the catalyst is up to 820 hours, so the process has a great industrial application prospect.
Owner:SHANGHAI ZHONGQI ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product
The invention provides a catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and a derivative thereof and an azo compound, and a product, and belongs to the technical field of chemistry. The pyrrolo [1, 2-a] quinoxaline and the derivative thereof are used, amination reaction of the azo compound is realized under the condition of visible light induction, formation of C-N bonds can be directly and efficiently induced through blue light (456nm), a new strategy is provided for C-N coupling reaction of the pyrrolo [1, 2-a] quinoxaline and the derivative thereof with the azo compound, the highest yield can reach 95%, and the method is suitable for industrial production. Compared with the existing method for catalyzing the amination reaction by using catalysts such as super acid, noble metal and fluorine-containing solvent, the method disclosed by the invention is safe and mild in reaction condition, green and environment-friendly, conforms to the green chemistry concept, and is beneficial to reducing the energy consumption and the environmental influence.
![Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product](https://images-eureka.patsnap.com/patent_img/4882eb3f-ca0e-46b7-b808-9fd3df85e131/BDA0005424254490000021.png "Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product")
![Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product](https://images-eureka.patsnap.com/patent_img/4882eb3f-ca0e-46b7-b808-9fd3df85e131/FDA0005424254480000011.png "Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product")
![Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product](https://images-eureka.patsnap.com/patent_img/4882eb3f-ca0e-46b7-b808-9fd3df85e131/HDA0005424254500000011.png "Catalyst-free photoreaction method based on pyrrolo [1, 2-a] quinoxaline and derivative thereof and azo compound and product")
Owner:SHIHEZI UNIVERSITY
Chemically amplified positive photosensitive composition, photosensitive dry film and method for manufacturing same, patterned resist film, substrate with mold case, and method for manufacturing plated molded article
PendingCN121596661APhotomechanical exposure apparatusPhotosensitive material processingPolymer scienceCasting mold
The invention relates to a chemically amplified positive photosensitive composition, a photosensitive dry film and a method for producing the same, a patterned resist film, a substrate with a casting mold, and a method for producing a plated molded article. The present invention addresses the problem of providing a chemically amplified positive photosensitive composition which is capable of forming a patterned resist film having a rectangular cross-sectional shape, has good stability over time after exposure, and is capable of suppressing development residues. The solution of the present invention is a chemically amplified positive photosensitive composition containing an acid generator (A) that generates an acid by irradiation with active light or radiation, a resin (B) whose solubility in a base is increased by the action of the acid, a sulfur-containing compound (E), and an acid diffusion control agent (F), the acid generator (A) contains an acid generator (A1) capable of generating a superacid having a van der Waals volume of no more than and a pKa of-6.5 or less and-10 or more.
Owner:TOKYO OHKA KOGYO CO LTD
Modified fatty acid oil-based drilling fluid wetting agent capable of resisting ultrahigh temperature of 260 DEG C as well as preparation method and application thereof
The invention provides a 260 DEG C superhigh temperature resistant modified fatty acid oil-based drilling fluid wetting agent as well as a preparation method and application thereof, and belongs to the field of oilfield chemistry in the petroleum industry. The preparation method of the wetting agent comprises the following steps: mixing ricinoleic acid and a base material fatty acid, carrying out dehydration treatment, adding a solid superacid catalyst I, and adding polyol for reaction; after the reaction is finished, filtering to obtain modified fatty acid; carrying out dehydration treatment on the obtained modified fatty acid, adding a solid superacid catalyst II, adding a grafting reagent containing an epoxy group, and carrying out ring-opening grafting reaction; then adding a polyhydroxy compound, and carrying out esterification cross-linking reaction; adding a high-temperature stabilizing aid into the obtained reaction liquid, and carrying out curing treatment; and cooling the obtained filtrate, adding an oil-phase dispersion medium, and uniformly stirring to obtain the oil-phase dispersion medium. The wetting agent provided by the invention can reduce the oil-solid interfacial tension and improve the wettability of the oil-based drilling fluid to drilling cuttings, well wall rocks and weighting materials.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Surface-modified synergistic warm mixing agent as well as preparation method and formula optimization method thereof
The invention provides a surface-modified synergistic warm mixing agent. The surface-modified synergistic warm mixing agent is characterized by comprising the following raw material components: a flame retardant, a synergist and a warm mixing agent, the flame retardant comprises aluminum hydroxide and ammonium polyphosphate, the synergist comprises titanium dioxide solid superacid, and the warm mixing agent comprises dimethyl dioctadecyl ammonium chloride; the ratio of the weight M1 of the aluminum hydroxide to the weight M2 of the ammonium polyphosphate to the weight M3 of the titanium dioxide solid superacid is that M1: M2: M3 is equal to 3: 5: 2, and the weight of the dimethyl dioctadecyl ammonium chloride is 30% of the weight of the flame retardant. The invention also discloses a preparation method and a formula optimization method of the surface-modified synergistic warm mixing agent. According to the asphalt adopting the surface-modified synergistic warm mixing agent, the cooling and flame-retardant properties of the asphalt can be improved, meanwhile, the preparation method is simple, the preparation cost is reduced, the optimization method of the formula is high in efficiency, and the optimization effect is also greatly improved.
Owner:SICHUAN JIAOTOU CONSTR ENG CO LTD +1
Synthesis method of triethylene glycol divinyl ether
PendingCN121155668AOrganic-compounds/hydrides/coordination-complexes catalystsEther preparation by compound additionVinyl etherPtru catalyst
The invention belongs to the technical field of organic synthesis and catalytic chemistry, and particularly relates to a synthesis method of triethylene glycol divinyl ether. The invention provides a compound of neutral ionic liquid and strong acid, and the compound is used as a catalyst for ethynylation reaction of alcohol and acetylene. Specifically, a compound of 1-butyl-3-methylimidazole bis (trifluoromethane sulfonimide) salt and trifluoromethanesulfonic acid is used for catalyzing the reaction of triethylene glycol and acetylene to prepare the triethylene glycol divinyl ether. The catalyst has super-strong acidity and good stability to water and air, is immiscible with a product, and creates an efficient and safe catalytic environment; the side reaction is effectively inhibited, the product purity is good, and the yield can reach 90% or above; and the catalyst and the product are automatically layered, separation and recovery are simple and convenient, the recovery rate is high, the catalyst can be repeatedly used for multiple times without obvious reduction of activity, and cyclic utilization of the catalyst is realized.
Owner:SHANDONG RBL CHEM CO LTD
A process for preparing glucosamine using N-acetylglucosamine fermentation broth
The present invention discloses a process for preparing glucosamine from N-acetylglucosamine fermentation broth, which comprises the steps of: 1. Mixing a Ti 4+ source and an Fe 3+ source, adding an alkali solution thereto for precipitation; then separating out the solid product, washing and drying it to obtain a precursor; impregnating the precursor with an ammonium persulfate solution, drying the obtained precursor and then calcining it to obtain a modified solid superacid; 2. Adding the modified solid superacid to the N-acetylglucosamine fermentation broth, carrying out hydrolysis under heating conditions, irradiating the reaction system with a light source after completion, and carrying out solid-liquid separation after completion to obtain a hydrolysis solution; 3. Concentrating the hydrolysis solution, carrying out alcohol precipitation, then separating out the solid product and drying it to obtain a glucosamine product. The process of the present invention not only overcomes the above problems brought about by hydrolysis with concentrated acid solution, but also can use the solid superacid to decolorize the hydrolysis solution and improve the purity of the obtained glucosamine product.
Owner:SHANDONG RUNDE BIOTECH CO LTD +1
Process for preparing a solid electrolyte based on polycarbonates and a composite electrode comprising such a solid electrolyte
A process for preparing a solid electrolyte or a composite electrode incorporating a solid electrolyte, configured for an electrochemical system, may involve: (i) synthesizing, in a solvent medium, at least one (co)polymer by ring-opening (co)polymerization (ROP) of at least one 5-8-membered cyclic carbonate and, optionally, of at least one 5-8-membered lactone, catalyzed by Brønsted superacid(s) and initiated by compound(s) comprising hydroxide group(s); (ii) adding to the reaction medium a sufficient amount of an alkali metal or alkaline earth metal hydride, e.g., LiH, to neutralize all the catalyst and obtain an alkali metal or alkaline earth metal salt and to protect the terminal hydroxyl group(s) of the (co)polymer(s); (iii) optionally adding to the mixture from (ii) salt(s) of the alkali metal or alkaline earth metal, e.g., a lithium salt; and (iv) forming a solid electrolyte by evaporation of the solvent medium or a composite electrode incorporating the solid electrolyte.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Catalyst for synthesizing triethylene glycol di-2-ethylhexoate and preparation method thereof
PendingCN120305987APhysical/chemical process catalystsOrganic compound preparationPtru catalystEthyl group
The invention discloses a solid superacid catalyst for synthesizing triethylene glycol di-2-ethylhexoate and a preparation method of the solid superacid catalyst. Aiming at the esterification reaction characteristics of 2-ethylhexanoic acid and triethylene glycol, SO4 < 2-> is loaded on a metal oxide carrier through an impregnation method, and the SO4 < 2-> / ZnO solid superacid catalyst is prepared. The preparation method comprises the following specific steps: fully impregnating a ZnO carrier with an ammonium sulfate solution, filtering, drying, and roasting to obtain a powder catalyst; the method comprises the following steps: uniformly mixing a powder catalyst with a binder, a pore forming agent, an extrusion aid and a peptizing agent, adding deionized water, fully kneading, extruding to obtain a formed wet material, and finally air-drying, drying and roasting to obtain the formed catalyst. The formed solid superacid catalyst prepared by the invention has a stable structure, is easy to separate and recover, is especially suitable for 2-ethylhexanoic acid which is a long-chain reactant with large steric hindrance, and improves the conversion per pass of esterification reaction.
Owner:FUZHOU UNIV +1
A solid superacid catalyst, its preparation method and application
The application belongs to the technical field of industrial catalysis, and particularly relates to a solid superacid catalyst and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: twice adjusting the pH of a solution by using ammonia water to obtain a metal salt precursor, and acidifying the metal salt precursor to obtain the solid superacid catalyst. It can be seen that the raw material for preparing the catalyst is cheap and easy to obtain, and the preparation process is simple and green. The catalyst with a core-shell structure has excellent catalytic performance, and the conversion rate of reactants is still higher than 98% after the catalyst is repeatedly used for 5 times, so that the catalyst can be repeatedly used for many times and has the advantages of small energy consumption. When the catalyst is used for synthesizing bisphenol compounds, the conversion rate of reactants reaches 99.91%, and the product selectivity reaches 99.86%, so that the catalyst has a wide application prospect.
Owner:ZHONGKE AEROSPACE CHEMICAL (BEIJING) CO LTD
An aromatic hydrocarbon refining agent, a preparation method and application thereof
ActiveCN119951495BRefining with metal oxidesMetal/metal-oxides/metal-hydroxide catalystsDivalent metalStrong acids
The application discloses an aromatic hydrocarbon refining agent and a preparation method and application thereof. The refining agent comprises a composite metal oxide and a solid super strong acid, the metal comprises divalent metal A and trivalent metal B, wherein the atomic molar ratio of A / (A+B) is 0.45-0.81; the preparation method of the refining agent comprises the following steps: a solution containing metal A and metal B is reacted with a mixed solution of sodium hydroxide and sodium carbonate, the obtained mixture is further reacted and calcined to obtain a composite metal layered oxide I, the composite metal layered oxide I is sequentially treated by a strong base and an acid to obtain a composite metal oxide II; then the solid super strong acid is loaded to obtain an aromatic hydrocarbon refining agent intermediate; finally, ammonium exchange and calcination are carried out to obtain the aromatic hydrocarbon refining agent. The prepared refining agent can solve the problem of poor dispersion of the super strong acid, improve the reaction activity of the super strong acid, and greatly prolong the service life of the refining agent.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Preparation method of compound solid superacid dimethyl ether catalyst
PendingCN121695901APhysical/chemical process catalystsEther preparation by compound dehydrationOrganic acidPtru catalyst
The invention discloses a preparation method of a compound solid superacid dimethyl ether catalyst. The method comprises the following steps: 1, preparing tungsten oxide-zirconium oxide solid superacid; and 2, preparing the titanium oxide solid superacid. And 3, mixing and kneading the two solid superacid, the gamma alumina carrier and the binder according to corresponding mass, adding rare earth element dysprosium by an equivalent-volume impregnation method, drying and roasting to obtain the required compound solid superacid dimethyl ether catalyst. The dimethyl ether catalyst prepared by the invention has the characteristics of high conversion rate and good selectivity, and especially has better anti-interference capability on water, alcohol, ester, organic acid and acetone.
Owner:WUHAN KELIN FINE CHEM
Preparation method of high-purity alkenyl succinic anhydride
The invention belongs to the technical field of preparation of alkenyl succinic anhydride, and particularly relates to a preparation method of high-purity alkenyl succinic anhydride. Mixing 1-octadecene and 1-hexadecene with the sulfuric acid modified zirconium-based MOF catalyst and the antioxidant, and carrying out microwave-assisted isomerization; the preparation method comprises the following steps: dispersing a maleic anhydride cyclohexane solution through a PDMS film, and adding a tungstate supported silicon dioxide-cellulose nanofibril composite catalyst to carry out an addition reaction; and oxidizing the reaction liquid with ozone, and performing membrane distillation and refining through a PTFE hydrophobic membrane. According to the method, the isomerization efficiency is improved through an ordered mesoporous structure and a super acidic site of a sulfuric acid modified zirconium-based MOF catalyst, the reaction temperature is reduced through microwave assistance, mass transfer is improved through PDMS membrane dispersion, maleic anhydride homopolymerization is inhibited through a composite catalyst, and low-temperature efficient refining is achieved through ozone-membrane distillation. Compared with the prior art, the method has the advantages of high olefin conversion rate, high ASA addition selectivity and purity and low energy consumption, and solves the problems of incomplete isomerization, thermal runaway and insufficient purity in the prior art.
Owner:SHANDONG GUORUN NEW MATERIAL TECHNOLOGY CO LTD
Preparation method and application of dual-carrier solid superacid
PendingCN121103392APhysical/chemical process catalystsOrganic compound preparationPtru catalystAlcohol ethyl
The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of double-carrier solid superacid, and the double-carrier solid superacid is SO4 < 2-> / TiO2-ZrO2; the preparation method specifically comprises the following steps: S1, weighing butyl titanate, dissolving butyl titanate in an ethanol solvent, and adding a glacial acetic acid solution under stirring at room temperature; s2, weighing zirconium n-propoxide, adding the zirconium n-propoxide into the solution obtained in the step S1, adjusting the pH value, and stirring until the reaction mixture is gelatinized under a constant-temperature condition; s3, soaking the gel in the step S2 in absolute ethyl alcohol, washing the gel, and drying and grinding the gel to obtain gel powder; soaking the gel powder, carrying out suction filtration, drying a filter cake, and grinding to obtain solid powder; and S4, dipping the solid powder obtained in the step S3 in an H2SO4 solution, carrying out suction filtration, drying a filter cake, grinding, crushing, and roasting at a high temperature to obtain the solid superacid SO4 < 2-> / TiO2-ZrO2.
Owner:ZHEJIANG QIKE BIOTECHNOLOGY CO LTD
Crystal face regulated titanium dioxide solid superacid as well as preparation method and application thereof
The invention discloses crystal face regulated titanium dioxide solid superacid as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly stirring ascorbic acid, tetrabutyl titanate and absolute ethyl alcohol in a hydrothermal kettle; adding hydrofluoric acid into the hydrothermal kettle, stirring to obtain a precursor, reacting at a set temperature for 12-36 hours to obtain a product, washing the product, filtering and drying to obtain a dried product; placing the dried product in a tubular furnace under the protection of inert gas, and calcining at the constant temperature of 400-600 DEG C for set time to obtain titanium dioxide carbon compounds with different crystal face proportions {001} and {101}; mixing the product with sulfuric acid, uniformly stirring, washing, precipitating, filtering and drying; and transferring the dried product into a tubular furnace under the protection of inert gas, calcining at the constant temperature of 400-600 DEG C for 2-5 hours, and cooling to room temperature to obtain the titanium dioxide carbon compound solid superacid of which the crystal face ratio of {101} to {001} is (1: 9)-(9: 1).
Owner:HANGZHOU XINGZAI TECH CO LTD
Anion-conducting polyelectrolytes comprising amide group, preparation method and applicationthereof
The present invention relates to the field of hydrogen energy, and more particularly to an anion-conducting polyelectrolyte comprising an amide group, a preparation method and application thereof. The method includes: polymerizing aromatic hydrocarbons and ketone comprising amide group by superacid catalysis, forming a membrane by a casting method, performing the membrane prepared under alkaline conditions to obtain theanion-conducting polyelectrolytes comprising amide group. Theanion-conducting polyelectrolytes obtained have good solubility and excellent stability. It is a kind of high molecular polymer with excellent alkali stability with an amide structure on the backbone. After alkaline treatment, the polymer not only has high hydroxide conductivity, good mechanical properties, and thermal stability but also has excellent alkali stability and excellent performance of water electrolysis.
Owner:NIGBO SINO TECH HYDROGEN MEMBRANE TECH CO LTD
Anion exchange membrane with high stability and high flexibility and preparation method thereof
The invention relates to the field of anion exchange membranes, in particular to a high-stability and high-flexibility anion exchange membrane and a preparation method thereof.The preparation method comprises the steps that S1, alpha, omega-diphenylalkane, tribenzylamine and 4-imidazole formaldehyde are dissolved in an organic solvent, and a branched polymer is prepared through a one-pot polycondensation reaction and purification treatment under the catalysis of superacid; s2, carrying out quaternization treatment on the purified branched polymer to obtain a quaternized polymer; s3, dissolving the quaternized polymer in a film-forming solvent, and casting to form a film; and S4, carrying out ion replacement on the obtained membrane to obtain the hydroxyl type anion exchange membrane. The defects of poor stability, insufficient flexibility and the like of the anion exchange membrane are overcome, unstable factors are eliminated from the source from technologies of molecular level design, comprehensive branched structure construction, flexible chain segment introduction, Cardo structure deletion and the like, and the anion exchange membrane with rigidity and softness is prepared.
Owner:CHANGZHOU UNIV +2
A process for the preparation of vanillin
ActiveCN117049954BPreparation from carboxylic acid halidesPhysical/chemical process catalystsPtru catalystOrganosolv
The application discloses a preparation method of vanillin, and steps include: (1) mixing guaiacol, formyl chloride, carbonate and / or bicarbonate and an organic solvent to generate a nucleophilic substitution reaction, and obtaining a reaction solution containing 2-methoxy-1-formic acid benzyl ester; (2) filtering the reaction solution of step (1), and then adding solid superacid to the reaction solution, so that the 2-methoxy-1-formic acid benzyl ester generates a Fries rearrangement reaction under catalysis of the solid superacid to generate vanillin. The method is simple and efficient, has high atom utilization rate, less waste, and the solid superacid can be used as a Fries rearrangement reaction catalyst to improve the selectivity and conversion rate of the reaction, the catalyst is easy to separate and recycle, the catalyst has long service life, the production cost can be effectively reduced, and the production efficiency is improved.
Owner:WANHUA CHEM GRP CO LTD
Composite solid acid catalyst, its preparation method and application
The application relates to the field of catalysts, and discloses a composite solid acid catalyst as well as a preparation method and application thereof. The composite solid acid catalyst contains a silicon-aluminum molecular sieve, a first metal active component, sulfate ions and a second metal active component; the first metal active component is selected from at least one of non-noble metal elements in groups IVB, VB, VIB, VIIB and VIII; the second metal active component is selected from at least one of noble metal elements; wherein the proportion of the amount of super strong acid with H0<-12 in the total amount of H0<-3 in the catalyst is more than 20%. The composite solid acid catalyst is suitable for treating complex hydrocarbon raw materials, is applied to reactions such as aromatic hydrocarbon isomerization, dismutation and alkyl transfer, dealkylation or hydrocracking, and has the advantages of high reaction activity and high product selectivity.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1