387 results about "Organic base" patented technology

The invention relates to the technical field of synthesis of organic compounds, and discloses a synthesis method of an o-aminoanisole compound, which comprises the following steps: preparing a composite alkali slow-release system consisting of inorganic alkali and organic alkali; preparing a catalytic reduction reaction system containing a metal complex stabilizer, a transition metal catalyst and a hydrophilic ether cosolvent; a catalytic reduction reaction of o-nitroanisole is carried out, and the slow-release alkali-coated material gradually releases the composite alkali to maintain a stable pH environment; after the reaction is completed, adding a packing material rapid digesting agent to remove a packing material structure, and meanwhile, rapidly separating and protecting a product by using a product protective extracting agent and an antioxidant synergistic protective agent; and purifying and recovering the final product to obtain a high-purity o-aminoanisole product. The reaction efficiency, the product purity, the service life of the catalyst and the separation efficiency are comprehensively improved through the synergistic effect of the eight components, the product purity reaches 99.5% or above, the catalyst can be recycled for 5-8 batches, and the separation time is shortened to 0.5-1 hour.

The invention discloses a preparation method of 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole, which comprises the following steps: taking a hydroxylamine oxygen sulfonic acid aqueous solution and isopentenal as raw materials, carrying out oximation reaction in an organic solvent under an alkaline condition, then directly adding an acid or an organic base catalyst into the reaction system, and reacting for 2-4 hours to obtain 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole, thereby obtaining the 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole. Under the catalytic action of the catalyst, a cyclization reaction is carried out, after the reaction is finished, an intermediate solution containing 5, 5-dimethyl-4, 5-dihydroisoxazole is obtained, and the next step is directly carried out; and carrying out a chlorination reaction by taking the intermediate solution as a raw material and sodium hypochloride or chlorine as a chlorination reagent, and after the reaction is finished, carrying out post-treatment to obtain the 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole. The hydroxylamine oxygen sulfonic acid is used for enabling the isopentenal to be subjected to oximation reaction under the alkaline condition, then cyclization is carried out under the catalytic action of acid or alkali, the 5, 5-dimethyl-4, 5-dihydroisoxazole is generated, and the process has the advantages that the yield is high, the production steps are simplified, and the production cost is reduced.

The invention discloses a ketoazine-based polymer, an anion exchange membrane and a preparation method and application of the ketoazine-based polymer and the anion exchange membrane. A first linking group and a second linking group are mixed and then mixed with an aryl monomer A in an aprotic solvent of halogen atoms; slowly adding a super acid mixture; performing polymerization reaction in an environment of-5 to 3 DEG C to obtain a reaction solution; pouring the reaction liquid into a first mixed solvent to obtain PAAz; carrying out primary quaternization reaction on PAAz through carbonate, bicarbonate or hydroxide salt of alkali metal, and adding an organic base catalyst to assist the primary quaternization reaction; in the first quaternization reaction, a quaternization reagent is added; and pouring into a second mixed solvent, and precipitating to obtain purified PAAz. Under the condition of super acid catalysis, two or more alicyclic amine derivatives containing ketone groups react with one or more aromatic fused rings to generate a polymer containing secondary or tertiary amine. And carrying out quaternization treatment to finally form the cationic polymer.

The present application relates to a kind of carbon dioxide mineralization method and carbon dioxide mineralization device.The carbon dioxide mineralization method includes the following steps: mixing absorption liquid and industrial solid waste at room temperature, obtain mortar;Make mortar solid-liquid separation, obtain clear liquid and thick slurry;Carbon dioxide in flue gas is absorbed by clear liquid, obtain carbon-rich absorption liquid;Carbon-rich absorption liquid and thick slurry occur mineralization reaction at 180 DEG C-220 DEG C, obtain mineralized slurry;Make mineralized slurry solid-liquid separation, obtain mineralized ash and mineralized clear liquid;Wherein, absorption liquid includes inorganic base and organic base, organic base includes monoethanolamine, diethanolamine, triethanolamine, 3-methylaminopropylamine, N-methyl diethanolamine, piperazine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and 2-amino-2-methyl-1-propanolamine at least two kinds.The method greatly improves CO2 capture rate and CO2 utilization rate, and organic base consumption is less, absorption liquid regeneration energy consumption is low, and overall economy is good.

The invention relates to the technical field of nano materials, in particular to a silicon dioxide nanosheet and a preparation method thereof. According to the preparation method, organic alkali and a surfactant G400 are taken as a composite template agent, tetraethyl orthosilicate is induced to be subjected to hydrolytic condensation in a solvent, generated precipitates are washed, dried and calcined, and the silicon dioxide nanosheets can be obtained; the method is simple to operate, low in cost and high in efficiency, and the obtained silicon dioxide nanosheet is ultrathin, high in crystallinity and large in specific surface area.

The invention discloses a preparation method of 3-quinuclidinone hydrochloride, which comprises the following steps: carrying out temperature control reaction on 4-picolinic acid and chloroacetic acid under alkaline water conditions to obtain an aqueous solution of a compound a, and directly entering the next reaction without post-treatment after the reaction is finished; adding a reducing agent alkaline water system into the aqueous solution of the compound a, controlling the temperature to react, controlling the temperature to adjust the pH value to 5-5.5 after the reaction is finished, extracting with n-butyl alcohol, and drying to obtain an n-butyl alcohol solution of a compound b, and directly entering the next reaction step; wherein the reducing agent is one of sodium borohydride and potassium borohydride; dropwise adding thionyl chloride into an n-butyl alcohol solution of the compound b, controlling the temperature to react after dropwise adding is ended, and concentrating to remove the solvent and unreacted thionyl chloride after the reaction is ended, so as to obtain a compound c; carrying out Dieckmann condensation reaction on the compound c at controlled temperature under the condition of organic alkali by using toluene as a solvent, carrying out hydrochloric acid quenching reaction after the reaction is finished, and directly carrying out next-step reaction after extracting and removing impurities from a water phase containing a hydrochloride solution of a compound d by using toluene; and carrying out a decarboxylation reaction on the compound d in a hydrochloric acid aqueous solution at controlled temperature, after the reaction is finished, adjusting the pH value to 10-13, extracting, and salifying to obtain a target compound TM, namely 3-quinuclidinone hydrochloride. The preparation method of 3-quinuclidinone hydrochloride provided by the invention has the advantages of economical and easily available raw materials, mild reaction conditions, efficient reaction, simple operation and low cost, and is suitable for industrial application.

The present application relates to the low temperature curing high-strength benzoxazine type silicone adhesive formula and use method, the formula includes the benzoxazine group containing organic silicon compound and organic alkali compound, the mass ratio of benzoxazine group containing organic silicon compound, organic alkali compound is 100:0.1-20.The adhesive of the present application is based on the cooperation between the benzoxazine group containing organic silicon compound and the basic catalyst, can be cured at low temperature, realize the higher strength bonding.The benzoxazine type silicone adhesive formula provided by the present application can be directly used as adhesive, and the bonding strength is high;It can also be used as a basic formula, used as an adhesive after adding other fillers, to meet the different needs of various special occasions.

The invention provides a method for improving the L * color of polymerized MDI by using organic alkali and an oxidizing agent. By using the method, the L * color of a polymerized MDI product can be improved. Comprising the following steps: 1) adding organic alkali and an oxidizing agent into polymerized MDI; and 2) reacting the mixed solution obtained in the step 1) under a stirring or standing condition to obtain the treated polymerized MDI.

The invention discloses a preparation method and application of a wormcast granular bacterial fertilizer, and the wormcast granular bacterial fertilizer is prepared by adopting a base material ratio of wormcast to humus of 7: 3 through mechanical granulation, 80 DEG C constant temperature drying, particle cooling and functional bacterial agent spraying. The product has a remarkable application effect on various crops such as corn (grain corn, fresh corn and silage corn), hot peppers, tomatoes, traditional Chinese medicinal materials (radix glehniae, radix saposhnikoviae and radix achyranthis bidentatae) and the like, can give full play to the synergistic interaction effect of organic matrixes and functional microorganisms, and is stable in fertilizer efficiency, convenient to apply and suitable for industrial continuous production and large-area popularization and application.

The invention provides a liquid red direct dye and a preparation method thereof, and the method comprises the following steps: S1, dispersing 2-amino-5-naphthol-7-sulfonic acid and bis (trichloromethyl) carbonate in water, adjusting the pH value of a reaction system by using a first organic base, and reacting to obtain a scarlet acid aqueous solution; s2, dispersing a sulfo aromatic amine compound and nitrite in water, adjusting the pH value of a reaction system by using inorganic acid, reacting to obtain sulfo aromatic amine diazonium salt precipitate, and performing solid-liquid separation to obtain sulfo aromatic amine diazonium salt; and S3, adding the sulfonic aromatic amine diazonium salt in the step S2 into the scarlet acid aqueous solution in the step S1, adjusting the pH value of the reaction system by using second organic alkali, and reacting to obtain the liquid red direct dye. Through the preparation method, the red direct dye which can stably exist in a liquid form and is suitable for direct use can be obtained.

The present application relates to the technical field of molecular sieve preparation, and particularly relates to a mesoporous pore size adjustable SAPO-34 / pure silicon molecular sieve and a preparation method thereof, which comprises the following steps: uniformly stirring an aluminum source, a silicon source, a phosphorus source, a structure directing agent and distilled water to obtain an initial gel; placing the initial gel in a reaction kettle and performing hydrothermal crystallization in a static oven; sequentially performing filtration, washing, drying and calcination on the obtained product to obtain a SAPO-34 molecular sieve; adding the SAPO-34 molecular sieve into a functional solution of a cationic surfactant, performing water bath heating, and sequentially performing filtration, washing, drying and calcination on the obtained product to obtain a mesoporous pore size adjustable SAPO-34 / pure silicon molecular sieve; wherein the functional solution of the cationic surfactant comprises a cationic surfactant, an organic alcohol, a silicon source, an organic base and distilled water. The preparation method of the present application significantly improves the service life of the SAPO-34 / pure silicon molecular sieve as a catalyst in MTO reaction and the selectivity of the SAPO-34 / pure silicon molecular sieve to low carbon olefins.

The invention discloses a near-infrared absorption zwitter-ion ethylene-linked covalent organic framework photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out hydrothermal reaction on a mixture of an N-(3-sulfopropyl)-2, 4, 6-(trimethyl) pyridine monomer, an aldehyde monomer containing a thiophene unit, organic alkali and water to obtain the near-infrared absorption zwitter-ion ethylene-linked covalent organic framework photocatalyst. The zwitterionic ethylene-linked covalent organic framework photocatalyst ZVCOFs with near-infrared absorption is obtained. According to the method, a one-step green hydrothermal method is adopted, water is used as a solvent, pollution to the environment is reduced, traditional tedious freezing-pumping-unfreezing operation is omitted, high-yield COFs are obtained, and the method has the potential of industrial amplification. The ZVCOFs show excellent hydrophilicity due to rich zwitterionic groups and thiophene units, the light absorption range can be expanded to a near-infrared light region, the light absorption band edge reaches up to 852-1230 nm, and the ZVCOFs have excellent hydrogen evolution performance of photocatalytic water decomposition.

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a process for mass production of Ti-Beta zeolite based on local structure reconstruction method. The main technical features include: using water vapor assisted tetraethylammonium bromide template agent and alcohol amine weak organic base, and preparing Ti-Beta zeolite by local desilicon etching and repair reconstruction on the hydroxyl pit of dealuminated Beta zeolite. The benefits of the present application include: the combination of tetraethylammonium bromide template agent and alcohol amine weak organic base, and the limitation of the amount of silicate dissolved by the channel condensate liquid generated by dealuminated Beta zeolite and the liquid film on the surface of zeolite solid in saturated steam, which makes it easier to control the etching desilicon of the hydroxyl pit of dealuminated Beta zeolite and improves the receiving capacity of the hydroxyl pit to titanium ions with larger volume. The local structure defects generated by controllable etching desilicon can be directly repaired by using the quaternary ammonium cation provided by the TEABr template agent as a directing agent, so that the present application does not need to be assisted by fluoride or / and aluminum source.

A method of synthesizing acyl ester using a microreactor, including: injecting an acyl chloride, an alcohol, an organic solvent, an organic base and a calcium oxide into a microreactor by a mixed jet flow, wherein the acyl chloride is injected into the microreactor through a first channel; the calcium oxide is injected into the microreactor through a second channel; wherein each of the alcohol, the organic base and the organic solvent is independently injected into the microreactor through the second channel after being mixed with the calcium oxide, or is independently injected into the microreactor through the first channel after being mixed with the acyl chloride, and the injecting velocity ratio of the first channel to the second channel is 6 to 60.

This invention relates to the field of functional materials technology, and particularly to a floating defective g-C3N4 / PDI composite thin-film photocatalyst, its preparation method, and its application. The preparation method of the floating defective g-C3N4 / PDI composite thin-film photocatalyst provided by this invention includes the following steps: mixing defective graphene carbon nitride, N,N'-bis(3-aminopropyl)perylene-3,4,9,10-tetracarboxylic acid diimide (PDI), an organic base, and water to obtain a first suspension; mixing the first suspension with a monohaloacetic acid to undergo a protonation reaction, followed by solid-liquid separation to obtain a protonated composite material; mixing the protonated composite material with a thermoplastic resin solution to obtain a second suspension; and forming the second suspension into a film and then drying it to obtain the floating defective g-C3N4 / PDI composite thin-film photocatalyst. This photocatalyst is recyclable after use, does not cause secondary pollution to the environment, and exhibits excellent photocatalytic performance.

The application provides a laser etching PVDF micro-nano structure ultrafiltration membrane and a preparation method thereof, and comprises the following steps: introducing a conjugated double bond into polyvinylidene fluoride by reacting the polyvinylidene fluoride with an organic base to obtain modified polyvinylidene fluoride; adding the modified polyvinylidene fluoride, carboxylated graphene oxide powder, a catalyst, a plasticizer and a pore-forming agent into a dimethylacetamide solution, mixing uniformly to obtain a composite base membrane casting solution, adding an alcohol-water solution for phase inversion to obtain a modified polyvinylidene fluoride ultrafiltration membrane, performing laser etching, immersing the laser etching modified polyvinylidene fluoride ultrafiltration membrane into a hydrophilic solution, and / or spraying a hydrophilic polymer on the surface of the laser etching modified polyvinylidene fluoride ultrafiltration membrane to obtain a target ultrafiltration membrane. Compared with the prior art, the laser etching PVDF ultrafiltration membrane preparation method has obvious beneficial effects in the aspects of improvement of hydrophilicity, improvement of separation efficiency, increase of stability, reduction of energy consumption and environmental protection sustainability, and brings significant innovation and progress to the field of membrane separation technology.

This invention belongs to the field of organic synthetic chemistry technology, specifically relating to a selenium-based indoloquinazoline derivative, its preparation method, and its application, comprising: in an organic solvent, using aromatic amine compounds, malononitrile, and diselenoether as raw materials, in the presence of a palladium catalyst and an organic base, at 90°C... o The reaction was carried out under C conditions with stirring to obtain a selenyl indoline quinazoline derivative. This method features mild reaction conditions, simple operation, high yield, and good functional group compatibility, conforming to the principles of green chemistry. Furthermore, the selenyl indoline quinazoline derivative provided by this invention exhibits good inhibitory activity against Plasmodium, providing a drug lead compound for the development of novel antimalarial drugs and holding significant importance for the prevention and / or treatment of malaria.

This invention discloses a method for preparing furanyl diisocyanate and its applications, relating to the field of organic polymer compounds. Under nitrogen atmosphere, furoic acid is added to concentrated sulfuric acid and mixed, followed by the addition of paraformaldehyde and a temperature-controlled reaction to obtain bis(5-formic acid-2-furan)methane. An organic base is added to a solvent containing bis(5-formic acid-2-furan)methane, and diphenyl azide phosphate is added dropwise to react and obtain bis(5-acyl azide-2-furan)methane. The bis(5-acyl azide-2-furan)methane is dissolved in an organic solvent and reacted to obtain furanyl diisocyanate. This invention provides a high-yield, high-selectivity one-step method for obtaining the intermediate bis(5-formic acid-2-furan)methane, shortening the synthetic route, improving synthetic efficiency, avoiding the use of sodium azide, increasing safety, and reducing production costs. The production of bio-based polyurethane is environmentally friendly, economical, and industrially applicable, and can be used to develop environmentally friendly coatings, adhesives, and sealants.

The present application provides a kind of nitromethane tail gas treatment method, comprising the following steps: sodium hydroxide or potassium hydroxide aqueous solution and low-grade fatty diol and organic base miscible to form mixed solution after preheating, then nitromethane tail gas is passed into mixed solution and reacts, reaction end product is separated and purified to obtain corresponding sodium nitrite or potassium nitrite product.The present application also provides a kind of nitromethane production method, including the sodium nitrite or hydrogen potassium obtained above as raw material to recycle production nitromethane.The method of the present application solves the problem of nitromethane tail gas treatment, also can turn waste into treasure, reduce production cost, conducive to nitromethane production and environmental protection.

The invention belongs to the technical field of purification and regeneration of industrial oil products, and relates to a composite adsorbent for regeneration of phosphate fire-resistant oil and a preparation method of the composite adsorbent. The catalyst comprises the following components in percentage by mass: 40-60% of a mesoporous silicon-aluminum molecular sieve, 20-35% of surface modified activated aluminum oxide, 10-20% of organic alkali functionalized silica gel and 3-8% of a metal deactivator. According to the invention, the overall adsorption capacity and selectivity of various degradation products in the phosphate fire-resistant oil are obviously improved, and the adsorption loss of effective components of the base oil is effectively reduced.

The invention discloses a synthesis method of 1-(4-chlorphenyl) pyrazolidine-3-ketone, which comprises the following steps: by taking p-chlorophenylhydrazine hydrochloride and acrylamide as raw materials and toluene as a solvent, carrying out azeotropic dehydration under the normal pressure condition, cooling, adding flaky sodium hydroxide or potassium hydroxide, adding acrylamide, carrying out condensation reaction at 40-80 DEG C, filtering, washing and drying to obtain the 1-(4-chlorphenyl) pyrazolidine-3-ketone. And after the reaction is finished, acidifying, desolventizing, crystallizing and filtering to obtain the high-purity 1-(4-chlorphenyl) pyrazolidine-3-ketone. Compared with the prior art, the method provided by the invention has the following advantages: firstly, the inorganic base is adopted to replace the traditional sodium alkoxide organic base, so that the problems of flammability, danger and the like are avoided, and the reaction safety is greatly improved; process conditions are mild, operation steps are simplified, and repeated heating and cooling or negative pressure maintaining are not needed; and thirdly, the process is more environment-friendly, the molecular utilization rate is higher, by-products of alcohols are not generated compared with the traditional process, and the burden of sewage treatment is reduced. Sodium alkoxide is replaced by inorganic base, production cost is saved, and economic benefits are good.

This invention proposes a method for synthesizing glyoxylic acid from methyl glycolate. Using methyl glycolate and oxygen / water as raw materials, glyoxylic acid is produced in a one-step process. This invention employs a novel catalyst based on ZSM-5 molecular sieve, modified with transition metals and organic bases, and finally extruded into strips. This catalyst can catalyze both oxidation and hydrolysis. This route is characterized by its simplicity, high reactivity, and high catalytic selectivity, making it a green route for glyoxylic acid synthesis.

Novel photoresist developing compositions including a deprotonation agent, such as a nitrogen containing organic base capable of deprotonating a surface of portions of a photoresist layer exposed to radiation.

The present invention relates to an emulsion formulation comprising thiencarbazone-methyl or a pesticide-acceptable salt thereof, one or more organic water-immiscible solvents, one or more organic water-miscible solvents selected from linear and cyclic carbamate esters, one or more emulsifiers, and one or more organic bases, wherein the formulation exhibits a pH of 5.5 to 9.

The invention belongs to the field of medical intermediate compounds and organic synthesis, and particularly relates to a key intermediate of lotinib and a preparation method thereof, the preparation method comprises the following steps: (1) in an organic solvent, organic alkali, 2-cyanoethyl 5-acetyl-3-methylthiophene-2-carboxylic ester and 2, 2, 2-trifluoro-1-(3, 4, 5-trichlorobenzene) ethanone react to obtain an intermediate 1; (2) dehydrating the intermediate 1 into double bonds to obtain an intermediate 2; and (3) reacting the intermediate 2 with a ligand to obtain the key intermediate of lotinib. The intermediate is used for synthesizing lotinib. The preparation method provided by the invention has the advantages of extremely high chiral selectivity, mild conditions and stable yield, can be suitable for amplified production, and provides a new technology suitable for industrial production for the key intermediate of lotinia.

The invention discloses a water-soluble diclazuril solution and a preparation method thereof, and belongs to the technical field of veterinary drug preparations, the water-soluble diclazuril solution comprises 10-30 g / L of diclazuril, 100-500 g / L of an organic solvent, 30-60 g / L of an amine organic base, 5-10 g / L of a surfactant, the balance of water for injection, 3-5 g / L of propyl gallate, and 10-15 g / L of a composite fermentation broth, the organic solvent comprises the following components in percentage by mass: 20-40% of N, N-dimethylformamide, 40-70% of propylene glycol and 10-20% of ethanol, and the compound fermentation liquor is a fermentation product obtained by fermenting a mixture of felwort and tamarind fruits with a compound microbial inoculant. The water-soluble diclazuril solution provided by the invention not only can effectively prevent and treat chicken coccidiosis, but also is beneficial to improving the weight gain rate of broiler chickens in the recovery process after infection, the preparation method is simple, the cost is low, the use mode is convenient and efficient, and the use value of the water-soluble diclazuril solution in the aspect of broiler chicken breeding is effectively improved.

The invention relates to a fast-curing environment-friendly double-component organic silicon adhesive and a preparation method thereof. The fast-curing environment-friendly double-component organic silicon adhesive is prepared from a component A and a component B, the component A is prepared from the following components in parts by weight: 30 to 60 parts of hydroxyl-terminated polydimethylsiloxane, 30 to 60 parts of inorganic filler, 1 to 10 parts of ethylene propylene diene monomer-polydimethylsiloxane graft polymer, 1 to 5 parts of amino silicon oil, 1 to 5 parts of fumed silica and 0.2 to 1 part of organic base catalyst; the component B is prepared from the following components in parts by weight: 30 to 60 parts of alkoxy-terminated polydimethylsiloxane, 20 to 50 parts of inorganic filler, 1 to 10 parts of color paste, 1 to 5 parts of a bonding accelerant, 5 to 15 parts of a cross-linking agent and 0.2 to 1 part of a titanate catalyst. According to the double-component organic silicon adhesive disclosed by the invention, the hydroxyl-terminated polydimethylsiloxane and the alkoxy-terminated polydimethylsiloxane are cooperated, and the ethylene propylene diene monomer-polydimethylsiloxane graft polymer is introduced, so that the double-component organic silicon adhesive has an unexpected curing effect and an unexpected curing speed.

The application discloses a high-brightness quantum dot fluorescent microsphere and a preparation method thereof based on an alkali catalysis strategy, and comprises the following steps: (1) preparing thiol-modified dendritic mesoporous silica microspheres; (2) assembling the thiol-modified dendritic mesoporous silica microspheres and quantum dots to obtain a dendritic silica / quantum dot assembly; (3) adding 3-mercaptopropyl triethoxysilane to the dendritic silica / quantum dot assembly, and performing organic silane modification on the dendritic silica / quantum dot assembly in a non-polar organic solvent by taking an organic alkali as an alkali catalyst; and (4) growing a silica shell layer on the surface of the organic silane-modified dendritic silica / quantum dot assembly by a method to obtain the high-brightness quantum dot fluorescent microsphere. The preparation method avoids fluorescence quenching of oil-phase quantum dots in the process of coating silica, and completely retains excellent optical properties of the oil-phase quantum dots.

Methods, processes, compositions, systems and uses for separating acidic gases such as carbon dioxide from a gaseous mixture containing such acidic gases, utilising a dispersion of at least one organic base and an oleaginous medium, the dispersion further comprising at least one ionic surfactant, such as a metal-containing ionic surfactant.

The present application aims to provide a gradient pore distribution alumina carrier and a preparation method thereof, and belongs to the technical field of alumina material synthesis. After calcination of pseudo-boehmite, the present application immerses the pseudo-boehmite into an organic alkali solution twice for hydrothermal treatment. During the hydrothermal treatment, the alumina grains are rehydrated and secondarily grown to form elliptical flaky pseudo-boehmite with a morphology. The elliptical flaky particles are stacked to form a large number of macropore channels. During the shaping of the carrier, the content of the elliptical flaky pseudo-boehmite in the mixture is adjusted to prepare the alumina carrier with gradient distribution of the channels. The alumina carrier has a high content of macropores in the shell layer, and the channels are wide. The pore structure is beneficial to the diffusion of macromolecular reactants to the inside of the carrier, and at the same time, the surface of the carrier has a strong anti-clogging ability.