788 results about "Homogeneous catalysis" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention relates to the technical field of industrial production wastewater treatment, and particularly provides a resource utilization method of calcium chloride high-salt water containing high-concentration organic matters. The method comprises the steps of pretreatment, wet catalytic oxidation, salt type conversion, softening filtration, deep oxidation, nanofiltration purification and targeted adsorption, no residual mother liquor exists, no secondary pollution is generated, organic matters in effluent are stable and reach the standard, the water quality and water quantity fluctuation resistance is high, heterogeneous and homogeneous catalysts are combined for catalysis, and the purification effect is good. According to the method, the sodium chloride solution is used as a raw material, the homogeneous catalyst is recycled, in addition, most of salt in the homogeneous catalyst is also recycled, resource reutilization is fully achieved, the treatment cost is reduced, and the treated sodium chloride solution can be used as primary saline water for subsequent ion membrane electrolysis.

The invention discloses a membrane pore aeration ozone heterogeneous catalytic reactor and a water treatment system, and relates to the technical field of water treatment. The reactor comprises a reactor cavity, the top of the reactor cavity is provided with a water outlet assembly, and the bottom is provided with a water inlet assembly and a gas inlet assembly; the membrane component is arranged in the reactor cavity and comprises a bundle of hollow fiber membrane filaments which are bent in a U shape; the two ends of the hollow fiber membrane filaments are bundled and fixed in a mounting hard tube, the mounting hard tube is detachably connected with the air inlet assembly, and the air inlet assembly is used for communicating an external air supply device with the hollow fiber membrane filaments; micropores are distributed in the surfaces of the hollow fiber membrane filaments; and the reactor cavity is filled with catalyst particles. According to the membrane pore aeration ozone heterogeneous catalytic reactor provided by the invention, the ozone mass transfer efficiency and the utilization rate are improved, and the content of hydroxyl radicals used for degrading organic matters in water is increased, so that the organic matters which are difficult to degrade in water can be more effectively removed, and the ozone treatment operation cost is reduced.

The invention relates to the technical field of organic synthesis, in particular to a method for homogeneous catalytic synthesis of dimethyl carbonate by using a liquid separation method to separate a catalyst, which comprises the following steps: by using 0.3-15% long-chain tertiary amine as a homogeneous catalyst, carrying out homogeneous reaction on cyclic carbonate and methanol in a mass ratio of 1: (1.2-5.5) at 60-80 DEG C for 4-7 hours. And after the homogeneous transesterification reaction is completed, carrying out atmospheric distillation on the reaction mixture, and collecting fractions to obtain the target product dimethyl carbonate. Carrying out liquid separation on the heterogeneous atmospheric distillation residual liquid, and collecting a lower-layer material to obtain a by-product; and the collected material is a catalyst which can be directly recycled subsequently. The dimethyl carbonate synthesis method provided by the invention has the characteristics of high catalytic efficiency, easy catalyst separation, environmental protection, energy saving and the like.

The invention relates to the technical field of heterogeneous catalysis and fine chemical engineering, and discloses a rhodium-tungsten para-site MOF-based catalyst as well as preparation and application thereof. The invention relates to a rhodium-tungsten para-site MOF-based catalyst, which is composed of a catalytic active component, a metal additive and a carrier. The rhodium-tungsten para-site MOF-based catalyst provided by the invention takes a metal organic framework material as a carrier, an active component Rh and a metal additive W are stably anchored on the surface of the carrier, and an Rh-WOx para-site is successfully constructed; the rhodium-tungsten para-site MOF-based catalyst provided by the invention shows excellent catalytic activity and excellent cycle stability in olefin hydroformylation reaction, and overcomes the technical bottlenecks that noble metals in a homogeneous catalysis system are easy to lose and energy consumption is high in a product separation process; an efficient and stable catalyst design thought is provided for olefin hydroformylation reaction, and the catalyst has a good industrial application prospect.

The invention discloses a metalloporphyrin porous electro-catalytic material with a bcu topological network structure, a preparation method of the metalloporphyrin porous electro-catalytic material and application of the metalloporphyrin porous electro-catalytic material in electro-catalytic oxygen evolution. A quadrangular pyrenyl skeleton molecule with eight connecting nodes and a quadrangular porphyrin skeleton molecule with eight connecting nodes are adopted, an ordered and expanded double-interpenetrating three-dimensional bcu topological network framework material is obtained through [8 + 8] imine condensation, and metallization of a porphyrin unit is further realized through metal ion post-modification, so that the porphyrin unit is obtained. The metalloporphyrin porous electro-catalysis material is obtained; the material as a heterogeneous catalyst has more excellent mass transfer efficiency and more accessible catalytic sites, has a wide application prospect in the field of catalysis, and particularly has an ideal catalytic effect in an electro-catalysis oxygen evolution reaction; # imgabs0 #

Disclosed in the present invention are a composite oxide support, a supported catalyst, and a hydrogenated nitrile butadiene rubber and a preparation method therefor and a use thereof. The composite oxide support comprises: SiO2 and a group IVB metal oxide, wherein the group IVB metal oxide is TiO2 and / or ZrO2, and the composite oxide support has the surface characteristics that three characteristic peaks are present in the infrared spectrum within the range of 610-720 cm-1 and another three characteristic peaks are present in the infrared spectrum within the range of 2840-2970 cm-1. The composite oxide support of the present invention can significantly improve the dispersion of active components on the surface of a catalyst and significantly improve the hydrogenation activity of the catalyst. The supported catalyst of the present invention is used in combination with a homogeneous catalyst for hydrogenation saturation of a high molecular polymer material at a low temperature and pressure, and the resulting high molecular polymer (especially hydrogenated nitrile butadiene rubber) product has a high degree of hydrogenation. In addition, the supported catalyst of the present invention can be reused multiple times, thereby improving the recyclability of the catalyst, reducing the preparation costs.

The present invention provides a catalyst, preparation method and application thereof for achieving deep desulfurization with O2 as an oxidant at below 80°C, belonging to the cross-field of nanocatalysis and environmental protection technology. The catalyst is a composite material of CeOx-MoOy / TS-1 (x=1.5-2, y=2-3) with high oxygen vacancy concentration, a theoretical active metal loading of 2-6wt%, an oxygen vacancy content of 20-50%, and contains two metals, Mo and Ce, wherein Mo includes two valence states: Mo 4+ 、Mo 6+ , low-valent metal Mo accounts for 40-80% (atomic percentage) of all Mo, and Ce includes two valence states Ce 3+ 、Ce 4+ , low-valent metal Ce accounts for 20-60% (atomic percentage) of all Ce, and Ce / Mo (1:1-1:10) is adjusted to obtain the best ratio, and this catalyst has a better ability to adsorb oxygen and activate oxygen. The composite material prepared by the present invention is a spherical structure with a smooth surface, and the active metal is evenly distributed and highly dispersed. As a heterogeneous catalyst, it can achieve oxidative desulfurization with oxygen as an oxide at 80°C, and has excellent reusability.

The invention discloses a method for improving the dewatering performance of excess sludge by combining mushroom residue-based ferromagnetic biochar with persulfate, and belongs to the technical field of solid waste treatment. The method comprises the following steps: pyrolyzing mushroom residues at a high temperature to prepare biochar, and loading iron ions on the biochar by adopting a hydrothermal method to obtain a heterogeneous catalyst of persulfate, namely the mushroom residue-based ferromagnetic biochar. The mushroom residue-based ferromagnetic biochar and persulfate are added into the excess sludge, the sludge structure can be destroyed through stirring treatment, the water content can be reduced, and the dewatering performance of the excess sludge can be improved. Compared with traditional catalysts such as transition metal ions, the mushroom residue-based ferromagnetic biochar provided by the invention is combined with persulfate as the catalyst, so that the catalyst is more environmentally friendly, efficient and stable.

The invention relates to the technical field of catalysis, in particular to a green preparation process for synthesizing 4 '-chloro-2-aminobiphenyl through a membrane method.A palladium-based catalytic membrane is prepared through an impregnation method, by means of the multi-pore-channel advantage of a ceramic membrane, active components can be well distributed on the surface and in the membrane, contact of a reaction substrate and active sites is promoted, and the catalytic activity of 4'-chloro-2-aminobiphenyl is improved. The reaction effect is enhanced, the reaction efficiency is improved, the preparation process is simple, the preparation environment is mild, and large-scale production can be realized; meanwhile, the 4 '-chloro-2-aminobiphenyl is prepared by adopting a method for carrying out Suzuki-Miyaura coupling reaction by adopting the catalytic membrane, tedious steps in the traditional industry are omitted, compared with a traditional heterogeneous catalyst, the trouble of recovery is avoided, the cost is saved, the harm to the environment is greatly reduced, and compared with the prior art, the 4'-chloro-2-aminobiphenyl has a wide application prospect.

The invention relates to an olefin hydroformylation homogeneous catalysis continuous reaction process and system. The process comprises the following steps: mixing raw materials olefin, synthesis gas and a metal catalyst, and then carrying out hydroformylation reaction; removing a light component containing the product aldehyde from the hydroformylation reaction liquid to obtain a heavy component containing the metal catalyst; uniformly mixing the heavy component with a first extraction agent, and performing phase splitting to obtain a first heavy component phase and a first extraction agent phase; a metal catalyst and a second extraction agent are separated from the first extraction agent phase, the metal catalyst is circularly used for the hydroformylation reaction, and the second extraction agent is used as the first extraction agent mixed with the heavy components. Based on the characteristics of solubility difference and specific gravity difference between the metal catalyst and other substances in the heavy components under specific conditions, the heavy components in a reaction system are reacted at a lower temperature on the premise of not additionally adding a reagent which can influence the activity of the catalyst, and the activity of the catalyst can be well maintained within a longer reaction time.

The present invention relates to the technical field of polymer preparation. Disclosed are a covalent organic framework material, and a preparation method therefor and a use thereof. The preparation method for the covalent organic framework material comprises the following step: subjecting an organic aldehyde and an organic amine to a condensation reaction in a deep eutectic solvent to obtain the covalent organic framework material, wherein the deep eutectic solvent is a two-component eutectic liquid composed of menthol and acetic acid. The temperature for the reaction is 25-120ºC, and the time for the reaction is 1-72 hours. The deep eutectic solvent composed of menthol and acetic acid used in the present invention has good dissolution properties for organic matters, and can also efficiently catalyze the condensation reaction between the organic amine and the organic aldehyde. The prepared covalent organic framework material exhibits high crystallinity and has good applications in the fields of adsorptive separation, heterogeneous catalysis, energy storage, etc. The present method has mild reaction conditions, simple operation, and good universality, is conducive to industrial large-scale production, and conforms to the concept of green chemistry.

According to the interface excitation effect design concept of a high-performance heterogeneous catalyst for hydrogen production by electrolysis of water, the heterogeneous characteristic of a gel system and the confinement effect of a three-dimensional network structure are utilized, and the non-noble metal-based heterogeneous catalyst is prepared. A solution containing nucleophilic components (nickel, cobalt and the like) is confined in a gel network framework constructed by electrophilic components (molybdenum, tungsten, vanadium, cerium, iron and the like), and the confined solution and the gel framework are subjected to heterogeneous nucleation and crystallization at the same time through sintering, so that the non-noble metal-based heterogeneous catalyst is obtained through direct reduction. The catalyst prepared by the method provided by the invention has a nano size, and has better electrochemical catalytic activity and stability in alkaline and neutral water electrolysis cathode catalysis processes as an electrode material. In addition, no waste liquid is discharged in the preparation process of the catalyst, the operation is simple, the preparation is simple and convenient, the large-scale preparation of the integral water electrolysis cathode hydrogen evolution electrode material is facilitated, and the large-scale practical application of the integral water electrolysis cathode hydrogen evolution electrode material is facilitated.

The invention belongs to the technical field of novel material catalysis, and particularly relates to a hollow mesoporous silica supported phosphotungstic acid catalyst and a preparation method and application thereof. According to the invention, the advantages of high specific surface area and regional effect performance of hollow mesoporous silica and the characteristic of adjustable acidity of vacancy heteropolyacid quaternary ammonium salt are innovatively combined, and the cationic surfactant is loaded on the surface of the hollow mesoporous silica, so that the contact surface of raw materials is effectively increased, efficient conversion of reactants is assisted, and the reaction efficiency is improved. The supported catalyst with efficient catalysis and stable performance is obtained. The catalyst can be used for a reaction for preparing glutaraldehyde through heterogeneous catalysis of cyclopentene oxidation, and the reaction condition is mild. Experiments show that under the catalytic system, the cyclopentene conversion rate can reach 90% or above, the glutaraldehyde selectivity is improved to 75% or above, double improvement of the cyclopentene conversion rate and the glutaraldehyde selectivity is successfully achieved, meanwhile, the advantage that the catalyst is easy to separate is achieved, and an efficient solution is provided for industrial application of synthesis of glutaraldehyde through cyclopentene oxidation.

The invention discloses a process for preparing methanol through carbon dioxide hydrogenation coupled with carbon dioxide capture. The process comprises the following steps: continuously adding an aqueous solution of organic amine into a primary reactor, continuously pumping carbon dioxide or enriched gas of the carbon dioxide through a Venturi ejector, and conveying the organic amine solution rich in the carbon dioxide into a secondary reactor; in the second-stage reactor, besides the organic amine solution rich in carbon dioxide, a solvent containing a catalyst is continuously introduced, hydrogen is continuously pumped in through a Venturi ejector, and a reaction solution is conveyed to the next-stage reactor; the reaction liquid of the n-stage reactor is conveyed to a three-phase separator for oil-water separation, and an oil phase and a water phase are respectively rectified to obtain methanol. According to the invention, the problem of gas-liquid mass transfer limitation in the process of carbon dioxide absorption by organic amine and methanol preparation by carbon dioxide hydrogenation is solved by using the jet loop reactor, and the homogeneous catalyst is combined, so that the reaction rate is greatly increased, and the process is continuous at the same time.

The invention belongs to the technical field of fine chemical engineering, and discloses a synthesis method of a malonate compound, which comprises the following steps: under the action of a heterogeneous catalyst, carrying out hydrolysis-esterification reaction on cyanoacetic acid and alcohol, and after the reaction is finished, carrying out post-treatment to obtain the malonate compound, the heterogeneous catalyst comprises a carrier and an active component; the active component comprises ionic liquid and active metal; the carrier is an ordered mesoporous material; the active metal is alkaline earth metal. According to the method, malonate products can be obtained, the problems of low yield, serious equipment corrosion and large amount of three wastes are solved, efficient synthesis of malonate compounds is realized, meanwhile, the production efficiency is improved, and the environmental pollution is greatly reduced.

The invention relates to the technical field of organic carbonate synthesis, in particular to a method for synthesizing methyl ethyl carbonate by using a liquid heterogeneous catalyst to catalyze transesterification, which comprises the following steps: by taking long-chain tertiary amine as a catalyst, catalyzing dimethyl carbonate and diethyl carbonate to perform transesterification reaction in a liquid heterogeneous manner to synthesize the methyl ethyl carbonate. The liquid heterogeneous catalyst expands the variety of catalysts for synthesizing methyl ethyl carbonate through ester-ester exchange, does not need to be specially filled, is high in equipment utilization rate and free of abrasion and corrosion to equipment, and has the advantages of being easy to disperse uniformly, high in catalytic efficiency, convenient to feed, convenient to use and the like.

The invention relates to the technical field of organic carbonate synthesis, in particular to a method for synthesizing methyl ethyl carbonate by using long-chain tertiary amine to catalyze ester exchange, which comprises the following steps: by taking 0.3-10% of long-chain tertiary amine as a homogeneous catalyst, reacting dimethyl carbonate with ethanol for 3-8 hours at 70-85 DEG C according to the mass part ratio of 1.6-10: 1 to prepare the methyl ethyl carbonate. The long-chain tertiary amine catalyst has no corrosion to equipment, is high in ester exchange catalytic activity and convenient to use, shows stability and water resistance superior to those of sodium alkoxide, and has relatively high cost performance.

The invention relates to the technical field of industrial wastewater treatment, and discloses a treatment method for grinding fluid wastewater of a grinder, which comprises the following steps: pretreatment and demulsification, multi-stage chemical purification, biochemical deep treatment, deep purification and recycling, and sludge treatment. A specific supported heterogeneous catalyst is adopted in the multi-stage chemical purification step, nano zero-valent iron and copper oxide composite active components constructed on the surface of the catalyst can enhance the generation efficiency and stability of free radicals in the advanced oxidation process, and a composite coagulant with an optimized ratio in the coagulating sedimentation step is cooperated, so that the purification efficiency of the high-grade oxidation process is improved. An efficient continuous removal system for heavy metal ions and refractory organic pollutants is formed; meanwhile, in the pretreatment step, the demulsifier is composed of specific components, through the synergistic effect of all the components, rapid demulsification of the emulsified oil phase in the grinding fluid wastewater is achieved, favorable conditions are created for subsequent deep treatment, and therefore the purification efficiency and operation stability of the technology are overall improved.

The invention provides a high-molecular-weight carbon dioxide-based elastomer, a cross-linked carbon dioxide-based elastomer and a preparation method thereof.A composite catalyst system containing a homogeneous catalyst and a heterogeneous catalyst is adopted for preparing the high-molecular-weight carbon dioxide-based elastomer, and through the synergistic effect of the homogeneous catalyst and the heterogeneous catalyst, the high-molecular-weight carbon dioxide-based elastomer is obtained; the technical problems of low catalytic activity, unstable reaction process and insufficient product molecular weight in the prior art are solved, and the elastomer material with high molecular weight and excellent mechanical property is obtained.

The invention discloses a method for predicting and controlling the ion dissolution concentration in a homogeneous catalytic ozonation system based on an LSTM model, and relates to the crossing field of neural networks and wastewater treatment.The method comprises the steps that historical inflow water quality parameters, operation parameters and outflow water iron ion concentration parameters of the homogeneous catalytic ozonation system are collected; preprocessing to obtain a training set and a test set; constructing an LSTM model, and performing training and testing by using the training set and the testing set to obtain a trained LSTM model; collecting inflow water quality parameters and operation parameters of a current homogeneous catalysis ozonation system, and inputting the inflow water quality parameters and the operation parameters into the trained LSTM model to obtain an iron ion concentration predicted value; and generating a current adjustment suggestion and / or a descaling operation suggestion according to the iron ion concentration predicted value. By fusing multi-source parameters, high-precision real-time prediction of the ion dissolution concentration is realized, and manual optimization of electrolysis process parameters can be effectively guided.

The invention belongs to the technical field of preparation of methyl tetrahydrophthalic anhydride, and particularly relates to a methyl tetrahydrophthalic anhydride isomerization catalyst and a preparation method thereof. The catalyst provided by the invention adopts a three-layer core-shell structure, and magnetic separation and recovery are realized by a magnetic Fe3O4-coated SiO2 / Al2O3 core layer; the alkaline middle layer of the mesoporous carbon loaded nano MgO is isolated by a PDMS hydrophobic layer; and the zirconium-based MOF acidic shell layer contains a sulfonic acid group and tungsten oxide. An Al2O3 protective layer and a tungsten oxide Lewis acid site are constructed through an atomic layer deposition technology, and coexistence of acid-base active sites is realized by combining PDMS interface isolation. The catalyst provided by the invention solves the problem of separation of a traditional homogeneous catalyst, synergistically regulates and controls the structure / stereoisomerization reaction, the product purity reaches 99% or above, and the catalyst is suitable for industrial continuous production.

The invention provides a method for judging the inactivation temperature and the inactivation characteristic of a hydroformylation catalyst. The method comprises the following steps: S1, preparing a hydroformylation reaction solution; s2, measuring the reaction liquid, filling the reaction liquid into an adiabatic test instrument to simulate a hydroformylation reaction, and when the temperature is increased to T0, stopping heating and carrying out an adiabatic reaction; recording the temperature change, and obtaining the highest temperature Tm; s3, cooling the test ball, taking out half of a reaction material, adding a hydroformylation reaction raw material, heating to simulate a hydroformylation reaction, stopping heating when the temperature is increased to T1, carrying out an adiabatic reaction, and recording the highest temperature Tmf; s4, comparing T1, Tm and Tmf; if Tmf is equal to T1, the inactivation temperature of the catalyst is Tm, and irreversible inactivation is carried out; if Tmf is equal to Tm, the inactivation temperature of the catalyst is Tm, and reversible inactivation is carried out; if Tmfgt; and Tm, taking out the material in the test ball, and repeating the steps S2-S4. The judgment method disclosed by the invention is short in test period and high in safety, does not need separation and component analysis on a test sample, and has guiding significance on catalyst operation upper limit and homogeneous catalyst recovery temperature selection research.

The utility model relates to a photocatalytic reactor and a wastewater treatment device, the photocatalytic reactor is used for wastewater treatment, the photocatalytic reactor comprises: a housing, the housing is provided with a water inlet, a water outlet and a catalyst inlet, the water inlet is arranged below the water outlet, the catalyst inlet is used for introducing a heterogeneous catalyst, and the catalyst inlet is arranged below the water outlet; an ultraviolet light source and an overflow screen plate are arranged in the shell, and the overflow screen plate is used for limiting the heterogeneous catalyst from flowing out. The photocatalytic reactor is high in photocatalytic degradation efficiency and can avoid loss of a heterogeneous catalyst so as to at least partially solve the problems in related technologies.

The invention provides a method for preparing biological crude oil by promoting hydrothermal liquefaction of pig manure through steel rolling oil sludge, and belongs to the technical field of biomass energy. According to the method for preparing the biological crude oil by promoting the hydrothermal liquefaction of the pig manure through the steel rolling oil sludge, the steel rolling oil sludge serves as a catalyst for the hydrothermal liquefaction reaction of the pig manure, under the subcritical condition, the emulsified structure of the steel rolling oil sludge is destroyed, and fatty acid, water and scrap iron are obtained, the iron scrap can be used as a homogeneous catalyst for hydrothermal liquefaction of organic matters in pig manure, and Fe and Fe3O4 in the iron scrap can be used as a heterogeneous catalyst; in addition, under the subcritical condition, fatty acid can be subjected to thermal cracking to generate H2, iron can also react with subcritical water to generate H2, and H2 can promote hydrodeoxygenation of organic matter and is beneficial to improving the oil quality of biological crude oil; meanwhile, unutilized fatty acid can also be used as a raw material to be converted into biological crude oil, so that the oil yield is further improved.

The invention discloses a surface zinc-loaded molecular sieve catalyst for PET (polyethylene terephthalate) depolymerization and a preparation method of the surface zinc-loaded molecular sieve catalyst. According to the catalyst, a molecular sieve with a framework silica-alumina ratio of 25-400 is adopted as a carrier, and zinc species are strongly loaded on the outer surface of the molecular sieve through chemical bonding. The preparation method comprises the following steps: dissolving a zinc source in water, and adjusting to a specific pH value by using inorganic acid to obtain a zinc-containing solution; dipping a molecular sieve carrier in the solution under a heating condition; and finally, filtering, washing, drying and roasting to obtain a finished product. The catalyst successfully solves the problem that reaction activity and separability of a traditional solid catalyst in PET glycol alcoholysis are difficult to consider at the same time by accurately regulating and controlling active site distribution, shows high activity and excellent cycling stability close to those of a homogeneous catalyst, and has remarkable industrial application potential.

The invention relates to a heterogeneous catalyst, a preparation method thereof and application of the heterogeneous catalyst in preparation of diisononyl cyclohexanedicarboxylate, and belongs to the technical field of organic synthesis. The heterogeneous catalyst takes polymer microspheres as a carrier and titanate as a modification group, and the polymer microspheres are obtained by mixing a macromolecular Raft reagent, a polymeric monomer, a chain transfer agent and a solvent and then adding an oxidation-reduction system consisting of an oxidizing agent and a reducing agent for dispersion polymerization reaction. The catalyst has the advantages of multiple active sites, high catalytic activity, easiness in ester separation from a product and the like. The heterogeneous catalyst can be used for obtaining the cyclohexanedicarboxylic acid diisononyl ester at a high temperature through one-step esterification. The preparation method comprises the following steps: adding hexahydrophthalic anhydride, isononyl alcohol and a heterogeneous catalyst into a reaction kettle at normal pressure to obtain the cyclohexanedicarboxylic acid diisononyl ester.

The invention belongs to the technical field of fuel oil oxidative desulfurization, and discloses an octamolybdate metal organic complex as well as a preparation method and application thereof. The molecular formula of the octamolybdate metal organic complex is Zn4 (Mo8O26) (C12H8N5O2) 424H2O, the octamolybdate metal organic complex belongs to a triclinic system and a P-1 space group, and a basic unit comprises one (Mo8O26) 4-polyanion, four Zn (II) cations, four C12H8N5O2 ligands and 24 crystal water molecules. The preparation process is simple, high-quality single crystals are easy to obtain, the crystal structure is stable, and the method is suitable for heterogeneous catalysts. The catalyst has excellent catalytic activity in oxidative desulfurization application under mild conditions; in addition, the catalyst can be recovered and reutilized only by filtering, and the catalyst has good recycling stability. In addition, the preparation method of the catalyst is simple and easy to implement, large-scale production is facilitated, and the catalyst has high commercial development value. The achievement provides a new solution for optimizing a fuel oxidation desulfurization technology and reducing environmental pollution.

The invention discloses a catalyst for preparing 5-hydroxymethylfurfural through sugar conversion and a preparation method and application thereof.The preparation process of the catalyst comprises the steps that hydrochloric acid or metal chloride is prepared into an aqueous solution with the concentration being 10-25 wt%, nitrogen-containing organic matter is added, the mixture is stirred for 0.5-3 h at the temperature of 20-50 DEG C, the organic matter and water are evaporated through reduced pressure distillation, and the catalyst is obtained; according to the present invention, the residual crystalline solid is collected so as to obtain the catalyst, the catalyst is used for preparing 5-hydroxymethylfurfural through sugar conversion, and compared with other homogeneous catalysts, the developed catalyst has advantages of low equipment corrosion, high reaction activity and high HMF selectivity.

The invention belongs to the technical field of catalysts, and particularly relates to a high-stability catalyst as well as a preparation method and application thereof. The high-stability catalyst comprises an internal catalyst component and a polyimide film coated outside the catalyst. The preparation method comprises the following steps: reacting a heterogeneous catalyst with a dianhydride monomer solution, adding a diamine monomer solution, and carrying out a polymerization reaction to obtain a polyamide acid film packaged heterogeneous catalyst; and adding an organic solvent into the polyamide acid film packaged catalyst, then adding a dehydrating agent, and carrying out imidization reaction under an alkaline condition to obtain the polyimide film packaged heterogeneous catalyst. After the heterogeneous catalyst is packaged by a polyimide film, the leaching of metal ions in heterogeneous Fenton reaction is obviously inhibited, the stability is greatly improved, and the heterogeneous catalyst shows excellent catalytic degradation activity of organic matters.