468 results about "Acid catalysis" patented technology

The invention relates to a high-temperature proton exchange membrane, in particular to a high-temperature proton exchange membrane based on silica cross-linked polybenzimidazole and a preparation method of the high-temperature proton exchange membrane. The preparation method comprises the following steps: polymerizing 3, 3 '-diaminobenzidine, 4, 4'-diphenyl ether dicarboxylic acid and 5-hydroxyisophthalic acid to form a polybenzimidazole main chain containing an ether bond and a phenolic hydroxyl group, grafting a silane coupling agent on the polybenzimidazole main chain, and finally carrying out membrane formation and acid catalysis treatment to obtain the high-temperature proton exchange membrane based on silica crosslinked polybenzimidazole. A silicon-oxygen network structure is introduced into a polybenzimidazole main chain, so that the phosphoric acid retention rate and the oxidation resistance of the polymer film can be effectively improved, and the service life of the polymer film is prolonged.

The invention relates to the field of caprolactam production, and discloses a green and efficient production process and device. The process comprises the following steps: continuously oximating cyclohexanone and hydroxylamine in a microreactor under the catalysis of mesoporous silica solid acid; carrying out gas phase rearrangement on cyclohexanone-oxime in the presence of a ZSM-5 molecular sieve under the assistance of microwaves; coupling, rectifying and purifying the crude product through a four-stage molecular sieve membrane; and performing catalytic cracking on the by-product to obtain N2 / H2O and recycling. The device comprises a micro-reaction unit, a microwave-radial reactor, a membrane coupling rectifying tower group and a tail gas cracking unit. Zero emission of ammonium sulfate is achieved, the product purity is larger than or equal to 99.95%, and energy consumption is reduced by 45%.

The invention discloses a method for preparing 12-mercaptan through solid organic acid catalysis, belongs to the technical field of 12-mercaptan preparation, and aims to solve the problems of low catalyst activity, harsh reaction conditions, serious pollution, high cost and dependence on import in the prior art. N-dodecanol and hydrogen sulfide are used as raw materials and are mixed according to the molar ratio of 1: 1.2-1: 1.3; the method comprises the following steps: gasifying n-dodecanol, mixing with purified hydrogen sulfide, preheating to 210-240 DEG C, introducing into a fixed bed reactor filled with a solid organic acid catalyst, and reacting at-0.08-3.0 MPa for 3.5-4 hours; and cooling and condensing the reaction product, carrying out gas-liquid separation, rectifying and purifying the liquid product to obtain 12-mercaptan with the purity of more than or equal to 99.5%, and recycling unreacted hydrogen sulfide. The solid organic acid can be a catalyst of p-toluenesulfonic acid and the like or mesoporous silica loaded nickel, cobalt and molybdenum metal oxides. The method has the advantages of high catalytic activity, mild reaction conditions, high product yield (the conversion rate of n-dodecanol is greater than or equal to 94.5%), environmental protection and low cost, can realize the domestic mass production of 12-mercaptan, and meets the market demand.

The invention belongs to the technical field of high polymer materials, and particularly relates to a phosphoric acid doped quaternized poly (alkane biphenyl-imidazole formaldehyde-biphenyl) polymer electrolyte membrane and a preparation method thereof. The preparation method comprises the following steps: in a nitrogen environment, adding 2-brominated biphenyl into tetrahydrofuran, uniformly stirring, adding n-butyllithium at-78 DEG C, stirring, adding halogenated alkane, and continuously stirring to obtain 2-alkane biphenyl; the preparation method comprises the following steps: carrying out Friedel-Crafts reaction on 2-alkane biphenyl, biphenyl and 4-imidazole formaldehyde, and carrying out strong acid catalytic polymerization to obtain a poly (alkane biphenyl-imidazole formaldehyde-biphenyl) polymer; carrying out quaternization treatment to obtain a polymer subjected to quaternization treatment; and finally carrying out phosphoric acid doping to obtain the polymer electrolyte membrane. A long alkyl chain is grafted to a main chain to construct microphase separation, more channels are provided for proton transmission, quaternization treatment is adopted, so that the polymer electrolyte membrane has higher acid absorption capacity, and the ether-free main chain can improve the mechanical property of the membrane.

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

The present invention relates to a fluxapyroxad intermediate trifluoronitrobiphenyl synthesis method, and belongs to the technical field of organic synthesis, the method comprises the following steps: Step 1: under nitrogen protection, adding 3, 4, 5-bromotrifluorobenzene, o-nitrophenylboronic acid, a catalyst, a promoter, an alkali and a solvent into a reaction flask, and after addition, carrying out a heat preservation reaction; and Step 2: after the reaction is finished, carrying out phase splitting and organic phase concentration to obtain the 3 ', 4', 5 '-trifluoro-2-nitrobiphenyl. Compared with a traditional synthetic method of the trifluoro-nitrobiphenyl, the synthetic method of the trifluoro-nitrobiphenyl has the advantages that the 3, 4, 5-trifluoro-bromobenzene and the o-nitrophenylboronic acid are directly used as raw materials, the production step of preparing the 3, 4, 5-trifluoro-phenylboronic acid from the 3, 4, 5-trifluoro-bromobenzene through a multi-step reaction is avoided, the yield can be effectively improved, the utilization rate of the raw materials is high, and the method is suitable for industrial production. And the o-nitrophenylboronic acid preparation method is simple, the reaction cost can be effectively reduced, the reaction route is shorter, simpler and more efficient, the reaction conditions are mild, and the method has higher industrial application value.

The invention belongs to the technical field of recycling of waste blended textiles, and particularly discloses a method for converting waste blended textiles into ethylene glycol and 1, 4-cyclohexanedicarboxylic acid, which is characterized in that under the action of a multifunctional solid acid catalyst and H2, the waste blended textiles are simultaneously depolymerized and converted into micromolecular chemicals, and the micromolecular chemicals are recycled. Compared with an existing method for depolymerizing and utilizing a single component in the waste blended textiles, the method has the advantages that simultaneous depolymerizing and utilizing of multiple components in the waste blended textiles are achieved, the method is few in process step, high in economic benefit, simple in actual operation and environmentally friendly, the energy consumption in the waste blended textile recycling process is reduced, and the recycling cost is reduced. And meanwhile, the side reaction and subsequent separation cost is reduced, and the process economy is improved.

The invention relates to analcime with an ANA structure and a preparation method of the analcime, the chemical molecular formula of a unit cell of the analcime with the ANA structure is Na < x > [SiyAlzO96], x is equal to 6-15, y is equal to 30-37, and z is equal to 10-16; the analcime with the ANA structure has a spherical crystal morphology. The analcime with the ANA structure disclosed by the invention has a spherical crystal morphology, shows excellent molecular diffusion performance, and has a good application prospect in the fields of small molecular acid catalytic reaction, small molecular gas adsorption separation, ion adsorption purification and the like.

The invention discloses a method for preparing an EGFR inhibitor through catalysis of lewis acid. The invention provides a novel preparation method of the compound as shown in the formula (I), and the method is high in yield, high in purity of the obtained product, stable in reaction on a large scale and more suitable for industrial production. # imgabs0 #

The invention discloses an anti-fatigue detection method for a structural member made of a high polymer material, and belongs to the field of material detection.The anti-fatigue detection method comprises the following steps that S1, a thermoplastic high polymer raw material for preparing the structural member is heated to be in a molten state, and a first intermediate is formed; s2, preparing a shell layer by taking polylactic acid, Y-type polyethylene glycol succinic acid, acetylsalicylic acid and a DCP catalyst as raw materials, and preparing fluorescent color developing agent microspheres by taking a high-temperature-resistant liquid fluorescent color developing agent as a core material; s3, adding fluorescent color developing agent microspheres into the first intermediate, uniformly stirring, heating, continuously stirring, uniformly mixing the color developing agent with the first intermediate after the color developing agent is released to obtain a second intermediate, and performing injection molding, molding, curing and cooling on the second intermediate to obtain a structural part sample; and S4, carrying out fatigue detection on the structural member sample by adopting a fatigue testing machine. The method solves the problems that closed cracks or internal defects are difficult to directly recognize from the inside and the initiation and expansion process of the internal cracks of the component cannot be captured at present.

The invention relates to the field of ion separation, and particularly discloses a crown ether-based monovalent / divalent selective cation exchange membrane preparation method, which comprises: carrying out super acid catalysis copolymerization on dibenzo crown ether and a pre-sulfonated monomer to obtain a precursor, and carrying out graft modification on a main chain by using a side chain on the basis to obtain the crown ether-based monovalent / divalent selective cation exchange membrane. The separation performance of monovalent / divalent cations is optimized, and the side chain type cation exchange membrane is prepared. The ion exchange membrane provided by the invention can be used for screening various monovalent / divalent ion systems, the number of # imgabs 0 can reach 370, the number of # imgabs 1 can reach 207, and the number of # imgabs 2 can reach 11125.

The invention provides a functional nanofiber material as well as a preparation method and application thereof, and the preparation method comprises the following steps: (1) adding raw materials into water to form an electrostatic spinning solution; performing electrostatic spinning to obtain a nanofiber membrane; (2) cross-linking the nanofiber membrane in an organic solvent under the catalysis of acid to obtain a cross-linked nanofiber membrane; and (3) carrying out grafting reaction on the cross-linked nanofiber membrane in a polyamine cross-linking agent, and then reacting with a sulfur-containing reagent to obtain the functional nanofiber material, the functionalized nanofiber material prepared by the preparation method disclosed by the invention combines good biocompatibility of polyvinyl alcohol, high specific surface area and high porosity of nanofiber and a synergistic adsorption effect of the polyamine cross-linking agent and cysteine, and has the advantages of large adsorption capacity, high adsorption rate, strong selectivity, good biocompatibility, stable structure and the like; the heavy metal ions in the plasma can be efficiently and safely removed, and a plurality of defects of the existing adsorption material are overcome.

The invention discloses an application of an ionic liquid in extraction of trioxymethylene, in the process of generating trioxymethylene by acid-catalyzed condensation of a formaldehyde aqueous solution, the ionic liquid is added as an extraction agent to extract and separate the trioxymethylene generated by reaction, and the ionic liquid is methyl tributyl phosphonium bis (trifluoromethanesulfonyl) imide salt; when the ionic liquid is used for extracting trioxymethylene, a ternary azeotropic system of trioxymethylene, water and methylene glycol can be broken, the ionic liquid and trioxymethylene are subjected to nonpolar Van der Waals' force interaction so as to realize extraction, and methylene glycol and water are left in a water phase through hydrogen-bond interaction, so that high-purity trioxymethylene with the purity of more than or equal to 99.5 wt.% is obtained.

The preparation method comprises the following steps: carrying out acid-catalyzed polymerization on p-terphenyl and a ketone monomer under the action of a first organic solvent and trifluoromethanesulfonic acid, and precipitating, filtering, washing and drying a reaction product to obtain a first polymer; carrying out quaternization reaction on the first polymer and quaternary ammonium salt under the action of a second organic solvent, cooling to room temperature, and adding 1, 6-hexamethylenediamine to obtain a second polymer solution; and coating a substrate with the second polymer solution, and carrying out drying membrane formation, heat treatment and hydroxyl anion exchange to obtain the cross-linked hydroxyl ion exchange membrane. The preparation method disclosed by the invention is simple and suitable for large-scale production, and the prepared anion exchange membrane has high ionic conductivity, excellent dimensional stability and mechanical property and relatively good machinability and application potential, and has a good application prospect in a water electrolysis hydrogen production technology.

The present technology provides a process for extracting acrylic acid from an aqueous feedstock that includes acrylic acid and one or more byproducts from catalytic dehydration of lactic acid to acrylic acid (e.g., acetol and / or 2,3-pentanedione), where the process steps include: contacting the aqueous feedstock with an extractant to obtain a raffinate and a solvent phase; separating the raffinate from the solvent phase; and removing the extractant from the solvent phase to obtain an extraction product, where the extractant is water-immiscible and has a distribution coefficient for acrylic acid (Kd, acrylic acid) from about 1.2 to about 10.0 (weight basis).

The invention discloses a precise construction strategy of a dibenzothiophene sulfuryl covalent organic framework material and systematically explains efficient application of the dibenzothiophene sulfuryl covalent organic framework material in photocatalytic synthesis of thiadiazole and derivatives thereof. The achievement relates to a plurality of leading subjects such as catalytic chemistry, organic synthesis, material science, environmental engineering and green chemistry. According to the method, 2, 4, 6-triformyl phloroglucinol and 3, 7-diaminodibenzo [b, d] thiophene-5, 5-dioxide are taken as construction units, and the crystalline S-COF rich in sulfuryl active sites can be quantitatively obtained through topology-oriented Schiff base condensation under the conditions of protonic acid catalysis, no water and no oxygen. Under the radiation condition of visible blue light, S-COF is used as a heterogeneous photocatalyst to drive green synthesis of 3, 5-di-p-tolyl-1, 2, 4-thiadiazole and series of derivatives thereof; the invention provides a new catalyst design normal form for light-induced organic conversion, and lays a solid foundation for sustainable development-oriented efficient synthesis chemistry.

The invention belongs to the technical field of organic synthesis and medicinal chemistry, and discloses a total synthesis method of rhododendron heteroterpenin Rhododaurines A-C. The total synthesis method comprises the following steps: carrying out allyl stereoselective addition on a compound 3 and a compound 5 in a toluene solvent under the conditions of catalysis of n-butyllithium and low temperature of-78 DEG C, and constructing a chiral center to obtain a compound 6; removing a methoxy methyl (MOM) protecting group from the compound 6 under an acidic condition, cyclizing, and reacting to generate rhododaurine C (7); the rhododaurine C (7) is subjected to intramolecular [4 + 2] cycloaddition and oxidation reaction in the illumination and oxygen atmosphere of 300-385 nm, and rhododaurine B (8) and an epoxy epimer epinedodaurine B (9) are obtained; and carrying out protonation and rearrangement on the epidodaurine B (9) by virtue of acid catalysis cyclic ether, so as to generate the rhododaurine A (10). The method can overcome the defects that the content of rhododendron miscellaneous terpenoids Rhododaurines A-C in nature is extremely low, and large-scale extraction is difficult.

The invention discloses a crown ether cation selective separation membrane and a preparation method thereof. The preparation method comprises the following steps: carrying out super acid catalysis on dibenzo-18-crown-6, terphenyl and isatin in dichloromethane to synthesize a precursor; carrying out affinity substitution reaction on the precursor and a flexible side chain with an ion exchange group through a pre-modification method to obtain a functional precursor; dissolving the functionalized precursor in an organic solvent to form a film casting solution, coating on a glass plate, and heating to volatilize the solvent so as to form a film through curing; and taking down the membrane from the glass plate, acidifying in an acidic aqueous solution, washing with deionized water, and extracting with deionized water to obtain the crown ether cation selective separation membrane. The crown ether cation selective separation membrane has the advantages of relatively high mechanical strength, physical and chemical stability and the like. Meanwhile, the crown ether cation selective separation membrane shows performance superior to that of a commercial membrane in the field of monovalent cation separation, and has wide application prospects in the fields of TMAH purification, salt lake lithium extraction, seawater salt extraction and the like.

The invention relates to a synthetic method of a finelrenone racemate, which comprises the following steps: carrying out Knoevenagel condensation, Hantzsch dihydropyridine synthesis, O-ethylation and deprotection four-step reaction, selecting a compound shown as a formula (2) and a compound shown as a formula (3) as initial raw materials, and carrying out Knoevenagel condensation reaction under the combined action of organic alkali and organic acid to synthesize a compound shown as a formula (4); carrying out Hantzsch reaction on the compound in the formula (4) and a compound in a formula (5) to synthesize a compound in a formula (6); carrying out O-ethylation reaction on the compound shown in the formula (6) and an ethylation reagent under the catalysis of acid to synthesize a compound shown in a formula (7); finally, 2, 4-dimethoxybenzyl is removed from the compound shown in the formula (7) under the promotion of acid to synthesize the finerenone racemate, the method is high in selectivity and simple in post-treatment, the yield and purity of the product are high, the HPLC purity can reach 99% or above, a new synthesis route and method are developed for synthesizing the finerenone racemate, and the method has good application potential and research value.

The invention belongs to the technical field of membranes, and discloses a monovalent / divalent cation selective separation membrane based on an intrinsic microporous polymer, and the preparation route of the membrane is as follows: taking an ether-free polymer synthesized by super acid catalysis as a precursor, introducing an ion exchange site into the polymer by utilizing grafting of a sulfonated monomer, and preparing the monovalent / divalent cation selective separation membrane based on the intrinsic microporous polymer. And improving the separation performance of monovalent ions / divalent ions by using an alkoxy chain graft with specific interaction on the monovalent ions, and greatly improving the mechanical strength of the membrane by using the interaction of hydrogen bonds between main and side chains, thereby finally obtaining the monovalent / divalent cation selective separation membrane. According to the present invention, the industrial production difficulty is significantly reduced by the full solvation reaction membrane synthesis route, the selectivity of the prepared membrane material is superior to the selectivity of the commercial membrane of the same type, the extremely high mechanical strength is maintained, and the large-scale production and application potential is provided.

The invention relates to the technical field of compound preparation, in particular to a preparation method of nitrobenzimidazole and aminobenzimidazole compounds, which comprises the following steps of: adding an inorganic base catalyst into an organic solvent by taking 4-nitro-o-phenylenediamine and a nitrobenzoyl chloride compound as raw materials; the preparation method comprises the following steps: reacting at a temperature lower than room temperature to obtain a condensation reaction solution, continuously raising the temperature of the condensation reaction solution to carry out cyclization reaction, and after the reaction is finished, carrying out post-treatment to obtain the 2-nitrobenzimidazole compound. Taking the 2-nitrobenzimidazole compound as a raw material, adding a reduction catalyst, carrying out hydrogenation reduction reaction in a solvent, and after the reaction is finished, carrying out post-treatment to obtain the 2-aminobenzimidazole compound. According to the preparation method, the inorganic base catalyst is used for replacing a conventional acid catalyst to realize one-pot synthesis, and the preparation method is high in selectivity, high in product quality and yield, mild in reaction condition, simple and convenient to operate, environment-friendly and suitable for batch production.

The embodiment of the invention provides a preparation method of methylene-bridged substituted phenol substituted by hydroxyl ortho-hydroxymethyl, and the preparation method comprises the following steps: A1, reacting substituted phenol with formaldehyde in the presence of a Lewis acid catalyst to prepare a substituted salicylaldehyde compound (2); a2, carrying out condensation reaction on the substituted salicylaldehyde compound (2) in a system containing formaldehyde and a Bronsted acid catalyst to prepare a methylene-bridged substituted salicylaldehyde compound (3); and A3, reducing the methylene-bridged substituted salicylaldehyde compound (3) to prepare methylene-bridged substituted phenol (4) with hydroxyl ortho-hydroxymethyl substituted. According to the embodiment of the invention, the yield and the chemical purity of the prepared methylene-bridged substituted phenol substituted by hydroxyl ortho-hydroxymethyl can be improved. According to other embodiments of the invention, the invention also provides a preparation method of the polyphenol compound containing multiple phenol units.

The invention discloses a method for catalyzing melamino-formaldehyde resin methylation reaction by solid acid. According to the invention, epoxy silane coupling agent grafted modified nanocellulose is introduced into sulfonated styrene-divinyl benzene cross-linked copolymer microspheres for in-situ crystal cross-linking, so that the problems that the traditional sulfonated polystyrene resin is poor in mechanical strength and solution solubility resistance, low in cycle index, easy to swell and fall off and the like are effectively solved; the prepared solid acid resin has the characteristics of high reaction activity, high proton transfer rate, high mechanical strength, high cyclicity and easiness in solid-liquid separation, and by utilizing the solid acid resin to catalyze the etherification reaction of the melamino-formaldehyde resin, the reaction temperature and the production energy consumption are reduced, the reaction time is shortened, the product quality and the production efficiency are improved, and the production cost is reduced. The problems of environmental protection and energy consumption caused by the generation of a large amount of VOCs in the etherification reaction of the traditional liquid catalyst for synthesizing the high-etherified melamine formaldehyde resin and the by-product inorganic salt in the subsequent process are solved.

The invention discloses a method for preparing high-density aviation fuel by catalyzing turpentine with Bronsted acid. The method comprises the following specific steps: step 1, regulating the strength of Bronsted acid to catalyze the isomerization reaction of terpenoids in turpentine, firstly generating cyclohexene and cyclohexadiene intermediates, and then performing Diels-Alder dimerization addition reaction on the intermediates generated by isomerization under the catalysis of the acid to generate a polycyclic high-density fuel precursor with the carbon number of 20; and 2, carrying out hydrogenation on C = C double bonds in the double-ring structure of the high-density aviation fuel precursor with the carbon number of 20 under the catalysis of a hydrogenation catalyst so as to generate the high-density aviation fuel. The invention provides a novel method for preparing high-density aviation fuel from biomass platform compound turpentine, and the whole preparation process is simple and convenient to operate.

The invention discloses a preparation method of 20 (E)-ginsenoside F4 and application of the 20 (E)-ginsenoside F4 in preparation of anti-liver injury medicines, and relates to the technical field of biological medicines. The rare ginsenoside 20 (E)-ginsenoside F4 is prepared and purified from ginsenoside Re through an acid catalytic conversion method, and the rare ginsenoside 20 (E)-ginsenoside F4 shows remarkable advantages and wide prospects in research and development of liver protection drugs. The monomer has strong liver protection activity, complies with the development trend of monomeric compound preparations, and provides efficient active ingredients for liver protection drugs. The 20 (E)-ginsenoside F4 with efficient activity, excellent safety and environment-friendly preparation characteristics can be widely applied to preparation of liver protection drugs or pharmaceutical compositions, especially drugs or pharmaceutical compositions for treating liver injury caused by chemotherapeutic drugs.

The invention discloses a preparation method of anthracene-d10, which comprises the following steps: mixing anthracene, a deuterium source, an acid, a catalyst and a solvent, carrying out hydrogen-deuterium exchange reaction to obtain a head product containing anthracene-d10, and purifying the head product to obtain anthracene-d10; the addition amount of the raw materials meets the condition that the ratio of anthracene to the sum of the acid and the deuterium source to the catalyst to the solvent is 1: (2-3.5): (0.05-0.1): (5-10) according to the mass ratio; wherein the catalyst contains at least one benzene ring, and the electron cloud density of the catalyst is greater than that of anthracene. The method is high in yield, high in deuteration degree, low in reaction temperature and suitable for industrial production.

The invention relates to a side chain type polyaryl anion-exchange membrane, a preparation method and application thereof and an anion-exchange membrane electrolytic bath, and belongs to the technical field of hydrogen energy. The preparation method of the side chain type polyaryl anion exchange membrane comprises the following steps: reacting a side chain type polyaryl skeleton polymer with a quaternization reagent to obtain a side chain type polyaryl anion polymer; the side-chain type polyaryl anion polymer is subjected to membrane forming, and the side-chain type polyaryl anion exchange membrane is obtained. According to the invention, a heteroatom-free polyaryl structure is selected as a main chain, and a super-acid-catalyzed Friedel-Crafts reaction is adopted for polymerization, so that the high-molecular polymer is obtained; the cationic functional group is a piperidine cationic functional group with excellent alkali stability; the piperidine cation functional group is connected with the polyaryl main chain through a long alkyl chain. According to the invention, a long alkyl chain is adopted to combine a polyaryl skeleton with a piperidine cation functional group, and a hydrophilic / hydrophobic microphase separation structure is constructed in the membrane, so that the conductivity of hydroxyl ions is remarkably improved while the alkali stability and the size stability are improved.

The invention belongs to the field of organic synthesis, and relates to a green synthesis method of retinaldehyde, in particular to a heteropolyacid catalyzed safe and green synthesis method of retinaldehyde. The preparation method comprises the following steps: heating, stirring and processing retinol serving as a raw material in an organic solvent under the action of heteropoly acid (HPA), and cooling and directly filtering after the reaction is finished, thereby obtaining the retinol. And the heteropoly acid is CsCu2PMo11VO40, CsCu3PMo11VO40 or CsCu4PMo11VO40, and the molecular formula of the heteropoly acid is CsCu2PMo11VO40 or CsCu3PMo11VO40. The preparation method provided by the invention has the advantages of low cost of used materials, mild reaction conditions, less generation of three wastes in the production process, short process flow and capability of effectively reducing the production cost, and the prepared retinaldehyde has relatively high yield.

The invention relates to a high-temperature proton exchange membrane, in particular to a semi-interpenetrating high-temperature proton exchange membrane based on imidazolyl polyion liquid and a preparation method of the semi-interpenetrating high-temperature proton exchange membrane. The preparation method comprises the following steps: dissolving polybenzimidazole, a silane coupling agent and the imidazolyl polyionic liquid in dimethyl sulfoxide to obtain a mixture, spreading and drying the mixture to prepare a membrane, and performing acid catalysis to form a silicon-oxygen cross-linked structure, thereby obtaining the semi-interpenetrating high-temperature proton exchange membrane based on the imidazolyl polyionic liquid. A silicon-oxygen cross-linked network structure is introduced into the proton exchange membrane, so that the oxidation resistance and tensile strength of the membrane can be improved, and the swelling rate of the acid-doped membrane can be reduced; the phosphoric acid adsorption rate can be improved by introducing the imidazolyl polyion liquid, so that the proton conductivity is improved.

The invention provides an antibacterial high-barrier starch-based plastic bottle and a preparation method thereof.The preparation method comprises the steps that firstly, titanate generates nano titanium dioxide in situ in starch through acid catalysis, starch is subjected to in-situ hybridization modification, and nano titanium dioxide in-situ hybridization starch is prepared; then adding nano inorganic barrier powder, and then adding a long-chain silane coupling agent to modify the nano titanium dioxide in-situ hybridized starch and the nano inorganic barrier powder to obtain a modified starch compound; performing vacuum kneading and drying until the water content is lower than 0.5%, and adding an antibacterial lubricant for plasticizing to obtain a plasticized material; and finally, carrying out melt blending and granulation with polyolefin resin, and carrying out extrusion blow molding. The environment-friendly and low-cost starch-based material is kept, meanwhile, the comprehensive performance of the product is remarkably improved, the surface contact angle of the product is 110 degrees or above, the antibacterial rate is 97% or above, and the oxygen permeation amount and the water vapor permeation amount are 100 cm / (m.24h. Atm) and 4 g / (m.24h) or below respectively.