1011 results about "Solid acid" patented technology

The invention provides a novel method for synthesizing 1, 4-bis (4-fluorobenzoyl) benzene, which belongs to the technical field of aromatic halide production, and comprises the following steps: under inert gas, adding supported solid acid and fluorobenzene into a reaction container; the preparation method comprises the following steps: dropwise adding paraphthaloyl chloride into a reaction container, and reacting at 5-30 DEG C for 1-8 hours to obtain 1, 4-bis (4-fluorobenzoyl) benzene; carrying out purification treatment on the reaction system to obtain 1, 4-bis (4-fluorobenzoyl) benzene with the purity of 97.2% or above; the supported solid acid is composed of a carrier and Lewis acid; lewis acid is selected from any one of aluminum chloride, ferric chloride, titanium tetrachloride and zinc chloride; the carrier is selected from any one of an HY molecular sieve, an Hbeta molecular sieve, a ZSM-5 molecular sieve, acid-treated K10 montmorillonite, aluminum oxide and an MCM-41 molecular sieve. The reaction system condition is mild, the product purity is larger than or equal to 97.2%, after the condition is optimized, the purity is larger than 99.5%, the product and the catalyst can be separated through filtering, waste salt is avoided, the catalyst can be recycled, and the reaction is green and environmentally friendly.

The invention belongs to the technical field of pyridone ethanolamine salt synthesis, and discloses an environment-friendly pyridone ethanolamine salt preparation process which comprises the following preparation steps: enabling isononanoyl chloride and 3, 3-methyl dimethacrylate to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester, and enabling the 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester to react under the catalysis of a solid acid catalyst to prepare 3, 7, 9, 9-tetramethyl-2-decene-5-keto acid methyl ester. The preparation method of the solid acid catalyst comprises the following steps: S1, taking water as a solvent, adding 14-16 parts by weight of zirconium oxychloride, 1-3 parts by weight of titanium sulfate, 0.1-0.5 part by weight of chloroplatinic acid and 0.05-0.4 part by weight of cerium chloride, adjusting the pH value to 10-11, and aging to obtain a precipitate; s2, roasting the precipitate obtained in the step S1 in an air atmosphere at 500-600 DEG C to obtain a solid acid catalyst; the method has the advantages that the catalyst is easy to recycle, and the reusability is high.

The invention belongs to the technical field of waste resource recycling, and discloses a preparation method and application of a solid acid catalyst for degrading waste PET to prepare TPA, and the solid acid catalyst for degrading waste PET to prepare TPA is a heteropolyacid asymmetric biquaternary ammonium salt solid acid catalyst with a phase transfer function. The preparation method comprises the following steps: carrying out an ion exchange reaction on an asymmetric biquaternary ammonium salt surfactant and heteropoly acid according to a molar ratio of (0.5-1.5): 1 to prepare the solid acid catalyst for degrading waste PET to prepare TPA; the application of the solid acid catalyst comprises the following steps: adding the waste PET, the solid acid catalyst and distilled water into a polytetrafluoroethylene or para-polyphenyl lining of a self-pressure-generating reaction kettle according to a certain mass ratio, and reacting at 180-220 DEG C for 4-24 hours by using a homogeneous reactor. The preparation method disclosed by the invention is simple and convenient in process, and the prepared solid acid catalyst has excellent catalytic degradation performance, can be recycled for multiple times, and is environment-friendly and resource-saving.

The invention provides a metal organic sulfonic acid-based solid acid catalyst applied to nylon 6 recovery and depolymerization and a preparation method thereof, and realizes upgrading and recovery of waste nylon 6. The main contents are as follows: (1) a structural design and a preparation method of the metal organic framework sulfonic acid-based solid acid catalyst; and (2) the solid acid is used for catalytic depolymerization of nylon 6. The problems that equipment corrosion is aggravated by inorganic acid in the nylon 6 recovery process and a liquid-phase catalyst is difficult to separate and recover are solved, and the application prospect is good.

The invention discloses a high-performance sodium-ion battery hard carbon negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing a carbon source precursor with metal chlorate, carrying out a catalytic carbonization reaction at 400-600 DEG C, and after the reaction, carrying out acid pickling and water washing to obtain a solid A; carrying out acid pickling and water washing on the solid A until the solid A is neutral, and carrying out microwave-assisted heat treatment at 1100-1500 DEG C to obtain a solid C; and crushing the solid C and carrying out chemical vapor deposition treatment to finally obtain the high-performance sodium-ion battery hard carbon negative electrode material. The hard carbon material prepared by the method has the advantages of abundant micropore structures, short-distance tight arrangement of layer structures, proper carbon layer spacing and low external specific surface area, and is suitable for a hard carbon negative electrode material of a high-energy and high-power-density sodium ion battery.

The invention provides a hydrolysis method of a waste nylon 6 fishing net. The hydrolysis method comprises the following steps: step 1, screening the waste nylon 6 fishing net, cleaning, removing impurities, disinfecting and crushing; step 2, pretreating diatomite; step 3, adding pretreated diatomite, solid acid and deionized water into a reaction kettle, stirring at 50 DEG C for 5 hours, and removing moisture to obtain a solid acid catalyst; 4, adding the solid acid catalyst, the cleaned waste nylon 6 fishing net and deionized water into a reaction kettle, controlling the temperature and time for reaction, and filtering while hot to obtain a liquid-phase product; 5, neutralizing, decolorizing and extracting the liquid-phase product to obtain a caprolactam monomer; and 6, carrying out polymerization reaction on the obtained caprolactam monomer to generate regenerated polyamide for chinlon spinning. According to the method provided by the invention, the solid acid catalyst is easily separated from reactants, the catalytic efficiency is high, the corrosion to equipment can be reduced, and the method is more environment-friendly.

The invention relates to the technical field of catalysts, and provides a supported sulfonated phenolic resin solid acid catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrophobic modification on the surface of a carrier by adopting a silane coupling agent to obtain a modified carrier; then carrying out polymerization in-situ growth on soluble phenolic resin and a curing agent on the modified carrier to obtain a phenolic resin-loaded modified carrier; the preparation method of the supported sulfonated phenolic resin solid acid catalyst provided by the invention has the advantages that the process is simple, the cost is low, and the utilization rate of phenolic resin is high; the prepared catalyst is uniform in size, high in mechanical strength, not easy to crush, small in resistance and good in stability during liquid-phase flow catalytic continuous reaction, has good catalytic activity and high isosorbide yield when being used for catalyzing dehydration of sorbitol to prepare isosorbide, and can be recycled.

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 present application relates to the technical field of fine chemical synthesis, and in particular to an efficient preparation process of octanoyl hydroxamic acid, which comprises the following preparation steps: S1, preparation of ethyl n-octanoate: 90-110 parts by weight of n-octanoic acid and 35-40 parts by weight of ethanol are mixed, and then a solid acid catalyst is added, and the mixture is heated to reflux for reaction for 2.5-3 hours, filtered to obtain a precipitate and a filtrate, and the filtrate is decompressed and distilled to obtain ethyl n-octanoate; S2, preparation of octanoyl hydroxamic acid: 0.4-0.6 parts by weight of sodium acetate and 0.2-0.4 parts by weight of sodium carbonate are added to water, stirred until dissolved, ethanol is added, and after stirring, 24-32 parts by weight of hydroxylamine and ethyl n-octanoate prepared in S1 are added to react to obtain octanoyl hydroxamic acid; the process has the advantage of improving the reusability of the solid acid catalyst.

The invention discloses a mesoporous solid acid composite catalyst as well as preparation and application thereof, and particularly relates to a preparation method and application of an acid-functionalized COF polymer and Beta molecular sieve composite catalyst. The solid acid composite catalyst is prepared from an acid functionalized COF polymer and a molecular sieve material through mechanical grinding, and the preparation method is simple and convenient. The solid acid composite catalyst has the advantages of high crystallinity, large specific surface area, rich pore structure, good chemical stability and the like. The prepared composite catalyst is stable in performance and high in activity at low temperature, polyoxymethylene dialkyl ether can be selectively synthesized, and the effect that reaction products do not conform to Schulz-Flory distribution is achieved by adjusting the composition of the composite catalyst.

A method of forming a substituted or unsubstituted gamma-lactone includes forming a reaction mixture that includes a substituted or unsubstituted cyano(C4-C10)alkene and / or a hydrolysis reaction product thereof. The reaction mixture also includes an acid, a solid acid catalyst, or a combination thereof. The method includes allowing the reaction mixture to react to form the substituted or unsubstituted gamma-lactone.

The invention relates to the technical field of crystalline porous materials, in particular to a covalent organic framework material and a preparation method and application thereof.The preparation method includes the steps that a tridentate organic ligand monomer, a bidentate organic ligand monomer and a solid acid catalyst are evenly mixed to obtain a mixture, the rotating speed of a double-screw extruder is set to be 5-35 r / min, the temperature is set to be 80-140 DEG C, and the mixture is extruded to obtain a covalent organic framework material; and adding the mixture into a double-screw extruder, heating, kneading, mixing, washing and drying to obtain the COF material. Shear force and heat are provided through a double-screw extruder, a molten reaction monomer is used as a reaction medium, a toxic solvent is not needed, the preparation method is simple, rapid, green and environmentally friendly, the obtained COFs material is high in crystallinity, the COF material is expected to be further processed and formed through a specific extrusion head, continuous large-scale production is achieved, and the method is suitable for industrial production. And the COFs material synthesized by the method disclosed by the invention has good flame retardant property.

The invention provides a BVPE preparation method based on solid acid catalysis and continuous flow reaction, and relates to the technical field of disubstituted ethane preparation, and the method comprises the following steps: mixing a compound 1, a polymerization inhibitor, a solid acid catalyst and a solvent to form a reaction liquid; enabling the reaction liquid to pass through a fixed bed continuous flow reactor, and reacting at 20-180 DEG C for 1-45 minutes to obtain a compound 2; post-treating, separating and purifying a product; wherein the solid acid catalyst is an HZSM-5 type molecular sieve or acidic resin, the product purity and yield are high, the HZSM-5 type molecular sieve or acidic resin is adopted as the solid acid catalyst, residual pollution of traditional protonic acid (such as p-toluenesulfonic acid) is avoided, in embodiments 1-3, the product GC purity reaches 98.6%-99.1%, the yield reaches 88.8%-93.8%, and the product GC purity and the yield are remarkably higher than those of a contrast (the purity is 96.1%, and the yield is 74.2%).

The invention discloses an application of a silica-sulfonic acid type solid acid catalyst in the preparation of dimethyl 2,5-furandicarboxylate. The dimethyl 2,5-furandicarboxylate is obtained by catalyzing the esterification reaction of 2,5-furandicarboxylic acid and methanol with a silica-sulfonic acid type solid acid catalyst; wherein the silica-sulfonic acid type solid acid catalyst is obtained by grafting, oxidizing and sulfonating silica and a silane coupling agent. The silica-sulfonic acid type solid acid catalyst in the present invention is easy to recover, and has good thermal stability and reusability; the preparation process of dimethyl 2,5-furandicarboxylate provided at the same time has little corrosion to equipment, simple wastewater treatment, mild reaction and high economy.

The invention discloses a composite carrier supported hydrogenation catalyst and application thereof, the composition of the catalyst is Pd-M-Nb2O5-B, and the content of the active component palladium Pd is 0.2-1.5%; the auxiliary agent M is one or two of silver and bismuth, and the molar ratio of the content of the auxiliary agent M to the active component Pd is 1: (0.5-4); nb2O5-B is a composite carrier, and the composite carrier accounts for 97.0-99.5% of the total weight of the catalyst; in the composite carrier Nb2O5-B, the content of Nb2O5 is 8 to 15 percent; b is one or more of TiO2, SiO2 and Al2O3, and the weight ratio of TiO2 to SiO2 to Al2O3 is (1-3): (5-20): 100. The catalyst has excellent water resistance, the complex carrier has stronger acidity compared with common solid acid, the product yield is higher, and the stability of the acetyl n-propanol generated by the reaction of the catalyst can be improved.

The invention belongs to the technical field of recycling of waste blended textiles, and particularly discloses a method for oxidative depolymerization of waste blended textiles into alpha-hydroxy acid and terephthalic acid, which comprises the following steps: adding waste blended textiles, a solid acid catalyst and a reaction solution into a catalytic reaction kettle, filling a certain amount of air and / or oxygen, and reacting for 2-4 hours; the method comprises the following steps: adding alpha-hydroxy acid into a reaction kettle, heating to a specified temperature, stirring, carrying out selective oxidative depolymerization, after the reaction is finished, filtering, concentrating, separating and purifying the product to obtain terephthalic acid, glycollic acid and lactic acid, and taking terephthalic acid and alpha-hydroxy acid as depolymerization products of blended textiles and also as catalysts to participate in depolymerization of blended textiles. According to the method, the autocatalysis process of depolymerization conversion of the waste blended textiles is achieved, the product composition is simple and easy to recycle, carbon atoms in the raw materials are fully utilized, the requirement of green chemistry is met, depolymerization conversion of multiple components in the waste blended textiles is achieved through a one-pot method, the process steps are few, economic benefits are high, and actual operation is simple.

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 discloses a preparation method of tert-butyl alcohol, and relates to the technical field of chemical raw materials. The method comprises the following steps: pretreatment of a catalyst: activating the solid acid catalyst to remove possible impurities and moisture so as to improve the activity and selectivity of the catalyst; hydration reaction: adding the pretreated catalyst into a reaction tower, introducing isobutene gas and water, stirring, and carrying out hydration reaction under the action of the catalyst; and separation and purification: the reacted mixture enters a separator, tert-butyl alcohol and the raw material are separated out, the unreacted raw material isobutene is circulated back to the reaction kettle to continue to participate in the reaction, the separated crude tert-butyl alcohol product enters a rectifying tower to be rectified and purified, and the tert-butyl alcohol product is obtained. Compared with a traditional liquid acid catalyst, the solid acid catalyst has the advantages of being easy to separate, capable of being repeatedly used, small in corrosion to equipment and the like.

An aqueous surface treatment agent, which is used for surface treatment of a metal, contains (A) a trivalent chromium compound and (B) a water-soluble or water-dispersible acrylic resin. With respect to this aqueous surface treatment agent, the water-soluble or water-dispersible acrylic resin (B) has a solid acid value of 150 mgKOH / g to 740 mgKOH / g and a solid hydroxyl value of 24 mgKOH / g to 350 mgKOH / g; and the ratio of the mass of trivalent chromium contained in the trivalent chromium compound (A) to the mass of the solid content of the water-soluble or water-dispersible acrylic resin (B) is 0.07 to 2.8.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing 5-methylfurfural by using 2-methylfuran. The special solid acid catalyst is used for replacing traditional phosphorus oxychloride, hydrogen chloride and phosphorus-containing wastewater are eliminated from the source, and the sulfolane is used for replacing DMF (Dimethyl Formamide), so that solvent residues in the product are reduced. The solid catalyst SO4 < 2-> is modified to form a strong Bronsted acid site (-SO3H) which cooperates with Ce < 3 + > / Ce < 4 + > redox to inhibit carbon deposition, selectively activate 2-methylfuran alpha-C and inhibit side reactions, so that the selectivity and yield of a target product are improved. Na2CO3 neutralization is replaced by electrochemical neutralization, salt slag solid waste is eliminated, and environmental pollution is reduced. After the organic phase is dried and dewatered through a molecular sieve, most of the solvent is removed through rotary evaporation, and the residual crude product is subjected to centrifugal molecular distillation, so that unreacted raw materials and trace impurities are effectively removed, and the product purity is remarkably improved.

A system and method for generating a water-soluble mixture of oligosaccharides for facile conversion to fermentable sugars is provided. The method describes crushing, grinding, or both, a mixture of a cellulose feedstock and a solid acid catalyst, under pressure to induce a solid-solid interaction between the cellulosic feedstock and the solid acid catalyst to induce a chemical reaction to produce a grinded mixture, wherein the crusher assembly comprises rollers,introducing water to separate the grinded mixture into solids and a solution, wherein the solution comprises the oligosaccharides and enzymatically converting the solution to fermentable sugars.

The invention discloses a catalytic method for converting alpha-olefin in an alkane-olefin mixture into internal olefin and application, raw materials and a solid acid catalyst are carried out in a fixed bed or a reaction kettle, the reaction temperature is 50-150 DEG C, the reaction pressure is 15-400 psi, and the reaction environment is an inert gas atmosphere; when the reaction is carried out on the fixed bed, the mass space velocity of the solid acid catalyst is 1h <-1 >-20h <-1 >; when the reaction is carried out in the reaction kettle, the conversion frequency of the raw materials is 5000 mol substrate mol acid site density <-1 > h <-1 > to 50000 mol substrate mol acid site density <-1 > h <-1 >; wherein the raw material is an alkane-alkene mixture; the solid acid catalyst comprises an active component and a carrier, wherein the carrier contains at least one inorganic oxide; the active component has a structure as shown in a formula (1) and / or a formula (2), in the formula (1) and the formula (2), R is alkyl or phenyl, and n is greater than or equal to 1. According to the catalysis method provided by the invention, the conversion rate of alpha-olefin can be increased, and the proportion of skeleton isomerization products and oligomers in internal olefin products can be reduced.

The invention discloses a cationic polymer acid-resistant thickening agent as well as a preparation method and application thereof, and belongs to the technical field of oil-gas field development. The polymer thickening agent is prepared from the following components in percentage by mass: 65 to 85 weight percent of acrylamide, 15 to 35 weight percent of methacryloyloxyethyl trimethyl ammonium chloride, 0.01 to 0.05 weight percent of dicationic functional monomer and 1 to 8 weight percent of cosolvent, the acid liquor system comprises the following components in percentage by mass: 5wt%-30wt% of solid acid, 0.01 wt%-0.6 wt% of a cationic polymer acid-resistant thickener, 0.5 wt%-5.0 wt% of a corrosion inhibitor, 0.3 wt%-1.0 wt% of an iron ion stabilizer and the balance of water; wherein the solid acid consists of 5wt%-15wt% of a solid metal catalyst and 85wt%-95wt% of solid particle acid; the acid liquid system has excellent slow release performance, is simple in formula, convenient to transport, low in cost and suitable for site construction, and has wide market prospects.

The invention relates to an effervescent water-soluble fertilizer and a preparation method thereof, the effervescent water-soluble fertilizer comprises a solid acidic material, a solid alkaline bubble material, a water-soluble fertilizer raw material and a diaphragm material, and the effervescent water-soluble fertilizer is characterized in that the diaphragm material is divided into two parts, one part is used for internal addition, and the other part is used for external addition. The effervescent water-soluble fertilizer is high in dissolving speed, and the problems of pulverization and caking in the storage process of the effervescent water-soluble fertilizer can be effectively solved.

The invention provides a solid acid catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carbonizing lignin to obtain a carbon-based carrier; placing the carbon-based carrier in a plasma modification instrument, vacuumizing, and then introducing gas for activating treatment to obtain a lignin carbon-based material; and carrying out sulfonation treatment on the lignin carbon-based material to obtain the solid acid catalyst. The catalyst has the advantages of being short in preparation time, small in pollution, high in catalytic efficiency, recyclable and the like, can be applied to catalytic conversion of a fructose solution into 5-hydroxymethylfurfural, the yield can reach 70%-90%, corrosion of an inorganic acid catalyst to reaction kettle equipment is avoided due to use of the solid acid catalyst in the reaction process, and the catalyst is an environment-friendly catalyst.

The invention discloses a solid acid catalyst for synthesizing cyclic peroxide and application of the solid acid catalyst, and belongs to the technical field of catalytic synthesis. The solid acid catalyst has a core-shell structure, and the core-shell structure sequentially comprises the following components from inside to outside: a) a core: ZSM-5 zeolite, the surface of which is grafted with an amino group, and the aperture of which is 0.54-0.58 nm; b) an intermediate layer: a phosphorylated titanium dioxide layer containing Ti-O-P bonds; and c) a shell: a nitrogen-doped sulfonated carbon layer, the surface sulfonic group density is 1.6 mmol / g-1. 8mmol / g, a temperature-sensitive polymer network is grafted in the shell layer, and the tail end of the temperature-sensitive polymer network is modified with a sulfonic group. The problems of harsh reaction conditions, low product purity, poor catalyst stability and insufficient environmental friendliness in the prior art are solved.

An embodiment of a method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating under a catalyst to obtain a cyclic compound, in which the catalyst includes zeolite formed of an aluminum / silicon-containing composite oxide, and in which the zeolite has an SiO2 / Al2O3 ratio of 7 to 500. In addition, another embodiment of the method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating in the presence of a non-solid acid to obtain a cyclic compound.

The invention belongs to the technical field of fuel cells, and discloses a metal organic framework material with proton conductivity and a preparation method and application thereof. Pyrazolo [3, 4-c] pyridine is used as a ligand, a binuclear cuprous cluster is used as a connection point, a two-dimensional layered structure is constructed through the ligand and the binuclear cuprous cluster, a cuprous multi-nitrogen heterocyclic metal organic framework is formed, the cuprous multi-nitrogen heterocyclic metal organic framework is oxidized, and the cuprous multi-nitrogen heterocyclic metal organic framework is obtained. Divalent copper ions and monovalent copper ions exist in the oxidized cuprous multi-nitrogen heterocyclic metal organic framework, and the metal organic framework material with proton conductivity is obtained. The proton conductivity of the metal organic framework material can be remarkably improved by adopting a metal post-synthesis modification oxidation technology, and the proton conductivity of the metal organic framework material is comparable with that of commercial Nafion, and an oxidized sample shows extremely high chemical stability; the problem of poor stability of a non-fluorinated hydrocarbon polymer proton exchange membrane and inorganic solid acid researched in the prior art is solved.

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 relates to the field of olefin oligomerization reaction, and discloses a low-carbon olefin oligomerization reaction method. The invention relates to a low-carbon olefin oligomerization reaction method. The method comprises the following step: carrying out contact reaction on a mixture containing low-carbon olefin and a diluent and a solid acid catalyst, the solid acid catalyst is a supported MWW molecular sieve, and the supported MWW molecular sieve comprises an active metal and an MWW molecular sieve; wherein the ratio of the pyridine infrared L acid amount of the supported MWW molecular sieve to the total acid amount is (0.4-0.9): 1; the pyridine infrared spectrum of the supported MWW molecular sieve has two L acid absorption peaks at 1430-1473cm <-1 >, and the ratio of the absorption peak area of the L acid at the front wave number position to the total area of the two L acid absorption peaks is (0.3-0.7): 1. According to the method, the low-carbon olefin oligomerization reaction is catalyzed by selecting the catalyst with specific acid amount, so that the conversion rate of reaction raw materials and the selectivity of a target product are improved.