15 results about "Superacid" patented technology

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%.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention belongs to the technical field of inorganic chemical industry and material chemistry, and particularly relates to a method for preparing high-purity anhydrous chromium trichloride based on direct dehydration of solid acid. The method comprises the following steps: uniformly mixing pretreated chromium trichloride hexahydrate and solid superacid in proportion in an inert atmosphere; placing the mixture in a tubular reactor, and carrying out temperature programming stepped dehydration in a flowing dry inert gas or vacuum environment; and after the reaction is finished, cooling to room temperature in inert gas flow, extracting and separating by using an organic solvent or screening and separating, and drying in vacuum to obtain the anhydrous chromium trichloride. According to the method, the solid acid is directly used as the main dehydrating agent and the catalyst, the chromium trichloride hexahydrate is efficiently converted into the high-purity anhydrous chromium trichloride through the one-step method, the technological process is simple, the conditions are mild and safe, and the product is high in purity and environmentally friendly.

The invention belongs to the field of pharmaceutical and chemical engineering, relates to a green preparation method of an anti-influenza virus derivative key intermediate dibenzoselenoheptanone compound, and belongs to the field of pharmaceutical and chemical engineering. According to the preparation method, N, N-dimethylformamide and oxalyl chloride are utilized to perform in-situ activation on carboxylic acid to obtain an acyl chloride intermediate, then an intramolecular Friedel-Crafts acylation reaction is performed under promotion of cheap lewis acid anhydrous AlCl3 or FeCl3 and superacid TMSOTf, the dibenzoselenoheptanone compound is efficiently prepared, and particularly, the invention relates to preparation of 7, 8-difluorodibenzo [b, e] selenoheptyl-11 (6H)-ketone. According to the synthesis method disclosed by the invention, the use of polyphosphoric acid in an existing synthesis route is avoided, and the reaction is completed in a mild temperature range of 0-25 DEG C by introducing superacid, so that the problem that the dibenzoselenoheptanone compound is unstable at a high temperature and is difficult to prepare is effectively solved; and meanwhile, the harsh requirement of repeated heating and cooling in the original process is avoided, the reaction time is remarkably shortened, the energy consumption is reduced, the comprehensive production cost is effectively reduced while the process safety is improved, and the method is more in line with the production concept of green chemical industry.

The application discloses a method for synthesizing ethylene glycol diacetate by using a solid superacid catalyst. 2‑ The application discloses a method for synthesizing ethylene glycol diacetate by using a solid superacid catalyst of SO4 2‑ / TiO2-SiO2 type. The catalyst is prepared by co-precipitation of a titanium source and a silicon source, impregnation with dilute sulfuric acid and calcination, and has high specific surface area and rich strong acid sites. The catalyst can be used to catalyze esterification of ethylene glycol and acetic anhydride (or acetic acid) at 140-150 DEG C to efficiently generate ethylene glycol diacetate, the yield of which can be more than 90%, and the by-product is very little. The catalyst can be easily separated from the reaction system and has good recycling performance. The application has the advantages of high catalytic activity, good selectivity, no corrosion, recyclable catalyst and the like, and can be used for industrial production of ethylene glycol diacetate.

The invention discloses a solid superacid catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The catalyst comprises a mesoporous carrier, sulfate radicals combined on the mesoporous carrier and rare earth ions doped on the mesoporous carrier, wherein the mesoporous carrier is formed by compounding ZrO2 and Al2O3; the rare earth ions are Yb < 3 + > and Ce < 3 + >. The solid superacid catalyst provided by the invention has the advantages that the active components are uniformly dispersed, the catalytic activity is high, the conversion rate of ethyl n-caprylate in a capryloyl hydroximic acid preparation process can be improved, and meanwhile, the cycle service life of the catalyst is prolonged.