646 results about "Isomerization" patented technology

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The invention provides a beta '-sulfo-alpha, beta-unsaturated gamma-lactam derivative as well as a preparation method and application thereof, and belongs to the technical field of organic chemical synthesis. The beta '-thio-alpha, beta-unsaturated gamma-lactam derivative has a structure as shown in a formula I. According to the method disclosed by the invention, cesium carbonate is taken as alkali, and a molecular skeleton of the beta'-thio-alpha, beta-unsaturated gamma-lactam derivative is constructed through free radical coupling and olefin isomerization processes under the condition of blue light irradiation. Bioactivity evaluation shows that the beta '-sulfo-alpha, beta-unsaturated gamma-lactam derivative prepared by the method disclosed by the invention has an inhibition effect on MDA-MB-231 human breast cancer cells.

The invention relates to the technical field of biological aviation kerosene, and discloses a process for preparing biological aviation kerosene from waste grease. The method comprises the following steps: introducing waste oil into a hydrofining reactor, introducing hydrogen, carrying out a hydrodeoxygenation reaction under the catalysis of a hydrogenation catalyst, carrying out a reaction on the obtained hydrodeoxygenated oil in an isomerization pour point depressing reactor, and finally carrying out isomerization hot high-pressure separation treatment, isomerization cold high-pressure separation treatment and rectification tower segmentation to obtain the biological aviation kerosene. The specific surface area of a carbon matrix of the hydrogenation catalyst is large, the void structure is rich, a large number of Ni-Mo-P active catalytic centers can be exposed, precious metals such as platinum and ruthenium do not need to be added, the hydrodeoxygenation reaction efficiency of waste oil and fat is remarkably improved, the mass fraction of branched paraffin and cycloparaffin in biological aviation fuel is high, and the combustion performance is better.

The invention discloses a preparation method of a high-stability photoresponse covalent organic framework membrane and application of the high-stability photoresponse covalent organic framework membrane in selective separation of multiple components. 4-azido azobenzene is prepared by carrying out azido reaction on 4-aminoazobenzene in an acidic aqueous solution, and then a BPTA-TAPB-COF membrane is used as a matrix to prepare the high-stability photoresponse covalent organic framework membrane. 4-azido azobenzene is efficiently grafted to the pore wall of the BPTA-TAPB-COF membrane through a click chemical reaction, the photoresponse covalent organic framework membrane is constructed, and the covalent organic framework membrane can be used for multi-component selective separation and is suitable for multi-component systems with different sizes. The azobenzene group in the pore channel of the prepared Azo-COF membrane is subjected to reversible cis-trans isomerization under the irradiation of ultraviolet / visible light, the response speed is high, and the cycle performance is good; the Azo-COF membrane has good application in the light-operated nanofiltration process, the performance of the Azo-COF membrane is not reduced after the Azo-COF membrane is continuously recycled for 12 days, and the structure of the Azo-COF membrane is kept stable.

The invention relates to the technical field of C9 heavy aromatics, in particular to a method and device for producing mesitylene from C9 heavy aromatics, and the method comprises the following steps: firstly, in the presence of a catalyst, mixing the C9 heavy aromatics with hydrogen, performing dealkylation isomerization reaction and dehydrogenation separation to obtain a liquid-phase product, and then performing two-stage separation on the liquid-phase product to obtain mesitylene. And mesitylene is produced to the maximum extent. The C9 heavy aromatics are subjected to selective dealkylation and trimethylbenzene isomerization reaction, and the obtained product does not contain propylbenzene, and the content of methyl-ethylbenzene is 1t; the method has the advantages that the yield of mesitylene is more than or equal to 0.2%, the interference of methyl ethyl benzene on the separation of the mesitylene is eliminated, the loss of the mesitylene is small, the one-way yield of the mesitylene is more than or equal to 12%, the reaction process is simple, the mesitylene and unsym-trimethylbenzene products are high in purity, the unsym-trimethylbenzene can be recycled to further increase the yield of the mesitylene, the process is flexible, byproducts are few, the product value is high, and the utilization value of C9 heavy aromatic hydrocarbon resources is obviously improved.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

The invention provides a nickel metal hydroisomerization catalyst as well as a preparation method and application thereof. The catalyst comprises nickel, an alumina carrier and a molecular sieve, the nickel is loaded on the alumina carrier, and the content of the nickel in the catalyst is 1-10wt%; the molecular sieve is an SAPO molecular sieve. According to the invention, alumina is used as a carrier, non-noble metal nickel is loaded through a wet immersion method and is mixed with the molecular sieve to prepare the alkane isomerization catalyst, so that active metal with smaller particle size and higher dispersity can be provided, metal agglomeration at high temperature is avoided, and the utilization rate of metal is increased; the catalyst with excellent catalytic activity can be obtained only by loading low-content nickel metal, the catalyst has higher catalytic activity and selectivity, the obtained product contains more isomers, and the low-temperature fluidity of the product can be remarkably improved.

The invention provides a preparation method of 2-pentyl-2-cyclopentenone, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: carrying out a first-stage isomerization reaction on 2-pentylidene cyclopentanone and a first composite catalyst in a first atmosphere to obtain an intermediate, carrying out a second-stage isomerization reaction on the intermediate and a second composite catalyst in a second atmosphere, and controlling the volume ratio of nitrogen to hydrogen in the first atmosphere and the second atmosphere to obtain the 2-pentylidene cyclopentanone. In the first-stage isomerization reaction, the conversion rate of converting 2-pentylidene cyclopentanone into 2-pentyl-2-cyclopentenone is increased, and in the second-stage isomerization reaction, the use amount of hydrogen in the second atmosphere is reduced, the temperature of the second-stage isomerization reaction is increased, generation of by-products is inhibited, and the yield of 2-pentylidene cyclopentanone is increased. Further, the yield and the purity of the 2-pentyl-2-cyclopentenone can be improved. According to the preparation method, the first-stage isomerization reaction and the second-stage isomerization reaction are continuous reactions, intermittent reactions are not needed, and the preparation method is more suitable for industrial application.

The invention belongs to the field of petrochemical engineering, and discloses a bimetallic Ni-Pt / RFE hydroisomerization catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving a nickel precursor in water, stirring until clarification, and dropwise adding ammonia water to obtain a mixed solution 1; rFE is added into the mixed solution 1, the pH value is adjusted to be 9-11.5, suction filtration, washing and drying are conducted after stirring, and Ni / RFE is obtained; dissolving a platinum precursor in water, stirring until the solution is clear, and dropwise adding ammonia water to obtain a mixed solution 2; and adding the Ni / RFE into the mixed solution 2, adjusting the pH value to 9-11.5, stirring, and carrying out suction filtration, washing, drying and roasting to obtain the Ni-Pt / RFE. The method is simple and convenient to operate and mild in condition, the catalyst activity and the isomerization efficiency are remarkably improved through the synergistic effect of Ni and Pt, the catalyst preparation cost is greatly reduced while the use amount of precious metal is reduced, efficient conversion of long straight-chain alkane can be achieved, and the isomerization conversion rate of n-dodecane within 60 minutes can reach nearly 90%.

The invention discloses a multistage segmented rectification process for anise oil, which comprises the following steps: by taking crude anise oil as a raw material, carrying out multistage segmented rectification on a first-stage tower section, a middle tower section and a last-stage tower section through a rectification tower; wherein the first-stage tower section is used for removing light components, the last-stage tower section is used for refining trans-anethole, and the middle tower section is used for gradually increasing the concentration of the target component trans-anethole by gradually increasing the temperature; regular packing is adopted in the middle tower section, and the used packing is catalytic isomerization packing. The multi-stage segmented rectification process for the anise oil can be used for preparing high-purity and high-yield trans-anethole, and is short in process time, low in energy consumption and suitable for industrial production.

The invention belongs to the field of biofuel preparation through grease hydrogenation, and provides a catalyst for biofuel preparation through waste grease one-step hydrogenation and a preparation method of the catalyst. The catalyst is a non-supported NixMoyWz-kHY catalyst, and the preparation method of the catalyst comprises the following steps: uniformly mixing a nickel source, a molybdenum source and a tungsten source according to a certain proportion, adding deionized water and a reaction aid ethylene glycol, dissolving, heating, stirring, adding an ammonia water-ethanolamine mixed solution, complexing, steaming until the pH value of the solution is 7-8, and filtering to obtain the catalyst. And adding a certain amount of HY molecular sieve powder, methyl cellulose (MC) and citric acid into the solution, filtering the reaction solution, drying the filter cake at 120 DEG C, performing extrusion molding, and roasting to obtain the catalyst. The catalyst provided by the invention effectively solves the problems of high oxygen content, difficulty in deep isomerization and the like in the waste oil and fat, has the functions of hydrodeoxygenation, cracking and isomerization at the same time, and realizes one-step conversion of the waste oil and fat into biological aviation kerosene and biodiesel. Besides, the non-supported catalyst adopted by the invention has high-activity center density, the problems of aging and shedding of the carrier are not needed to be worried about, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

To provide an elenumab composition and its use.SOLUTION: The present invention relates to compositions comprising enumab and one or more enumab variants, including isomerized variants, deamidated variants, acidic variants, and HMW species. Pharmaceutical formulations comprising the enulumab compositions and methods of using and characterizing the compositions are also described. The present invention is based, in part, on the identification and characterization of product-related impurities of Enumab, in particular variants of Enumab with reduced functional activity.SELECTED DRAWING: None

This invention relates to the field of oil and fat synthesis technology, specifically to a method for preparing nervonic acid monoglyceride. In this invention, nervonic acid and glycerol are used as raw materials, and an esterification reaction is carried out under microwave assistance to obtain a first mixture containing nervonic acid monoglyceride, nervonic acid diglyceride, nervonic acid triglyceride, unreacted nervonic acid and glycerol, and a catalyst. Glycerol and the catalyst are removed by ethyl acetate extraction to obtain a second mixture. Subsequently, taking advantage of the temperature-sensitive nature of nervonic acid monoglyceride in edible oils, it is separated and purified to obtain nervonic acid monoglyceride. The esterification reaction under microwave assistance not only avoids the corrosion and contamination problems caused by traditional acid catalysts, but also significantly shortens the esterification reaction time, improves synthesis efficiency, and effectively inhibits the isomerization of cis-nervonic acid during the reaction, ensuring the stability of the product configuration.

The application discloses a method for preparing a hydrogenation deoxidation intermediate by using conjugated fatty acids and application thereof, and belongs to the technical field of oil production biofuel. The method comprises the following steps: (1) subjecting conjugated fatty acids and a dienophilic monomer to a Diels-Alder addition reaction to obtain an addition product; and (2) removing unreacted raw materials from the addition product, so that the hydrogenation deoxidation intermediate is obtained. The method breaks the traditional idea of deoxidation first and isomerization later, and instead adopts the idea of "structure modification first and hydrogenation deoxidation later" to prepare the hydrogenation deoxidation intermediate, so that the hydrogenation isomerization process can be omitted, the generation of cracking products is reduced, the content of isomerization products in the biodiesel is significantly improved, and higher-quality biofuel is obtained.

The production of HFO-1132, and in particular HFO-1132 E, may be produced from 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113), and the production of HFO-1132, and in particular HFO-1132 E, may be produced from 1, 1, 2-trichloro-1, 2, 2- In a first step, 1, 1, 2-trifluoroethane (HFC-143) is produced by hydrogenating 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) by reacting with hydrogen in the presence of a catalyst to produce 1, 1, 2-trifluoroethane (HFC-143). The 1, 1, 2-trifluoroethane (HFC-143) may then be dehydrofluorinated in the presence of a catalyst to produce trans-1, 2-difluoroethylene (HFO-1132E) and / or cis-1, 2-difluoroethylene (HFO-1132Z). The cis-1, 2-difluoroethylene (HFO-1132Z) may then be isomerized to produce the trans-1, 2-difluoroethylene (HFO-1132E), and then the cis-1, 2-difluoroethylene (HFO-1132Z) may be isomerized to produce the cis-1, 2

The invention belongs to the technical field of petrochemical engineering, and particularly relates to a method for producing transformer oil and bright stock from non-naphthenic oil. The method for producing transformer oil and bright stock from non-naphthenic oil comprises the following steps: raw oil firstly enters a first hydrogenation unit for hydrofining and hydrocracking reaction, then enters a second hydrogenation unit, and sequentially passes through an isomerization pour point depressing reactor, an isomerization cracking reactor and a finishing reactor to obtain secondary hydrogenated oil; and finally fractionating to obtain the transformer oil and bright stock. According to the method for producing the transformer oil and the bright stock from the non-naphthenic oil, the low-value non-naphthenic oil is taken as a raw material, and high-selectivity isodewaxing and cracking of the hydrocracking tail oil are realized by virtue of two hydrogenation units, so that the pour point lt can be obtained; and meanwhile, the high-quality bright stock is produced, and the economic benefit of the product is high.

The application provides a C8 aromatic hydrocarbon isomerization catalyst and a preparation method and application thereof. The catalyst contains an active component and a carrier; wherein, based on the weight of the carrier, the carrier contains 5wt%-25wt% of HZSM-23, 5-30wt% of mordenite, 20-60wt% of macroporous alumina and 10wt%-25wt% of a binder component. The method comprises preparation of the carrier and loading of the active metal, wherein the preparation process of the carrier is as follows: HZSM-23 molecular sieve, mordenite, macroporous alumina and a binder are mixed and formed, and the carrier is prepared after drying and calcination. The catalyst is used for C8 aromatic hydrocarbon isomerization reaction, and has the characteristics of high ethylbenzene conversion rate and high xylene yield when the xylene is at an equilibrium concentration.

The invention discloses a resource utilization method of low-quality C15 phosphonium salt. The preparation method comprises the following steps: (1) performing thermal decomposition reaction and isomerization reaction on the low-quality phosphonium salt to generate the C15 phosphonium salt; (2) adding a solvent into the reaction liquid obtained in the step (1) for extraction and phase separation, and collecting a product phase containing a C15 phosphine salt isomer; and (3) adding pentacaraldehyde and carbonate into the product phase containing the phosphonium salt, and carrying out condensation reaction to prepare the vitamin A acetate. According to the method, the low-quality phosphonium salt generated in the C15 phosphonium salt production process can be recycled, the produced low-grade vitamin A acetate is sold, the product mark is enriched, and the industrial competitiveness of the product is improved. The process is simple to operate, mild in reaction condition, green and environment-friendly, free of waste liquid and suitable for industrial production, and the industrial chain cost of the vitamin A acetate is greatly reduced.

The invention discloses a bio-based aviation fuel hydrodeoxygenation isomerization catalyst and a preparation method and application thereof, and belongs to the technical field of preparation of sustainable biological aviation fuel hydrogenation catalysts. The method comprises the following steps: uniformly mixing sodium silicate, ammonium salt and desalted water in a stirring kettle to obtain a colloidal substance A; mixing titanium tetraethoxy, acetic acid, ethanol and desalted water to obtain a colloidal substance B; the preparation method comprises the following steps: dropwise adding phosphoric acid into desalted water, adding pseudo-boehmite and silica sol, mixing and stirring, adding a template agent, crystallizing, cooling, filtering, washing and drying to obtain SAPO-31 raw powder; the preparation method comprises the following steps: stirring and mixing a colloidal substance A, a colloidal substance B and SAPO-31 raw powder, and then filtering, drying, roasting and crushing to obtain a composite carrier; adding the composite carrier into a nickel salt aqueous solution for dipping, and then drying and roasting to obtain the hydrodeoxygenation isomerization catalyst. The catalyst is applied to kettle type slurry bed hydrodeoxygenation and hydroisomerization reactions, and can effectively avoid occurrence of abnormal working conditions such as coking and temperature runaway of the catalyst.

The invention relates to a method and device for preparing low-carbon olefins, and the method comprises the following steps: S1, contacting raw oil with a catalytic conversion catalyst in a catalytic conversion reactor for catalytic conversion reaction to obtain a catalytic conversion reaction product; s2, separating the catalytic conversion reaction product to obtain ethylene and propylene as well as a first circulating olefin flow containing butene and / or a second circulating olefin flow containing C5 + olefin; s3, enabling the olefin material to enter an etherification unit, and contacting the olefin material with an alcohol raw material under an etherification condition to obtain a circulating ether material and etherified olefin; and S4, enabling at least one part of etherified olefin to enter an isomerization unit, and carrying out isomerization reaction in the presence of an isomerization catalyst to obtain isomerized olefin. According to the method disclosed by the invention, the conversion of ethers into low-carbon olefins can be realized, the yield and selectivity of ethylene and propylene are improved, the yield of methane is reduced, the content of methanol in the product is reduced to the greatest extent, and the conversion of low-cost methanol into low-carbon olefins is realized.

The invention discloses a ZSM-48 molecular sieve preparation method, which comprises: (1) adding agar into water, heating in an oil bath at a temperature of 105-120 DEG C to completely dissolve the agar so as to form an agar solution, and cooling the agar solution to a temperature of 70-80 DEG C; (2) adding a silicon source, a template agent, absolute ethyl alcohol and a first alkali source into the agar solution, and stirring at 70-80 DEG C to form a suspension containing microcapsules; and (3) adding an aluminum source and a second alkali source into the suspension, uniformly stirring to form a reaction solution, and then aging, crystallizing, filtering, washing and roasting to obtain the ZSM-48 molecular sieve. The invention also discloses a ZSM-48 molecular sieve supported metal catalyst prepared by adopting the ZSM-48 molecular sieve and application of the catalyst in a hydroisomerization reaction. The agar is used for dispersing the reaction materials to limit the reaction speed and improve the particle size and dispersity of the molecular sieve crystal grains, agglomeration of the crystal grains is avoided, and more acid sites can be released.

The invention discloses enhanced shampoo powder based on plant-derived antibacterial factors, which comprises the following components in parts by weight: A, 10-40 parts of plant polysaccharide; b, 5-30 parts of vegetable protein; c, 4-15 parts of natural alkaline ester; d, 2 to 10 parts of natural polyol; e, 1-7 parts of plant organic acid; f, 2 to 20 parts of a plant antibacterial active component; g, 3-6 parts of a food-grade anti-caking agent; h, 1 to 10 parts of divalent metal ions; i, 0.5-2 parts of food coloring; plant polysaccharide and plant protein are matched to form a net-shaped embedding structure, and plant antibacterial active components are uniformly embedded into a multi-layer steady-state structure; buffer substances of natural alkaline lipid, polybasic sugar alcohol and plant organic acid are matched to synergistically form a thermal steady state barrier on the periphery of the net-shaped embedding structure, so that the high-temperature stability of active factors in plant antibacterial active ingredients and the controllable slow release of the storage period are promoted; the technical problem that the plant antibacterial active ingredients are subjected to thermal oncolysis, hydrogenation inactivation or molecular configuration isomerization in the links of mixing granulation and subsequent drying is solved.

The application provides a preparation method of citral. By controlling the content of isopentenoic acid in a citral intermediate composition in the range of 10-2000 ppm, and then performing a thermal rearrangement reaction, citral product is prepared. The method can effectively reduce the selectivity of isomerization side reactions, and the yield of the final product citral is increased to more than 95%.

The invention discloses a preparation method of beta-carotene. The preparation method comprises the following steps: dissolving an aqueous solution of 3-methyl-5-(2, 6, 6-trimethyl-1-cyclohexene-1-yl)-2, 4-pentadienyl triphenylphosphine salt (C15 phosphine salt) and 2, 7-dimethyl-2, 4, 6-octtriene-1, 8-dialdehyde (C10) cis-trans isomer in a solvent, carrying out wittig reaction under the action of alkali, and carrying out isomerization to obtain the product. By controlling the proportion of C10 cis-trans isomers of the reaction system, the content of the C25 aldehyde intermediate can be reduced, and the reaction yield and the product quality can be improved.

The invention belongs to the technical field of synthesis of chemical products, and particularly relates to a method for preparing high-purity trans-CHDA. The invention firstly provides a dehydrogenation-hydrogenation reaction isomerization catalyst, a CHDA crude product is used as a raw material, and the proportion of trans-CHDA in a reaction liquid after a CHDA isomerization reaction is increased. According to the method for preparing the high-purity trans-CHDA, catalytic isomerization reaction conditions and process parameters of t-CHDA are optimized, the isomerization reaction of c-CHDA is completed on crude CHDA under the condition of a supported Pt / ZSM-Al2O3 catalyst and under the conditions of proper temperature and pressure so as to obtain high-purity t-CHDA, and t-CHDA is separated by selecting a proper separation solvent, so that the high-purity trans-CHDA is obtained. Therefore, high-concentration and high-purity t-CHDA is obtained, meanwhile, the reaction yield and the isomerization rate of t-CHDA are improved, and the method has a good application prospect.

A process for the catalytic production of olefins comprises the steps of delivering an n-paraffin-rich stream to an isomerization unit to provide a first hydrocarbon stream rich in iso-paraffin, and contacting the first hydrocarbon stream with a stream of a first flow catalyst in a first reactor riser to produce a first mixture of spent catalyst and product gas. The process comprises the step of separating the first mixture of spent catalyst and product gas into a first cracking product stream and a first cooling catalyst stream in a first separation vessel. The process comprises the steps of contacting a second hydrocarbon stream with a stream of a second flow catalyst in a second reactor riser to produce a second mixture of spent catalyst and product gas; and separating the second mixture of spent catalyst and product gas in a second separation vessel to provide a second cracking product stream and a second cooling catalyst stream. The first cracking product stream and the second cracking product stream are delivered upward through a gas recovery conduit and further separated from the catalyst in a series of cyclones to produce a high-temperature product stream.

The invention discloses a treatment technology for separating a sorbic acid isomerization product, and belongs to the field of chemical engineering. According to the method, water and ethanol in the eliminated mother liquor are separated through selective separation of the dehydration membrane, so that an ethanol solution with higher concentration is obtained, the concentrations of sorbic acid and isomers in the solution are increased, then the crystallization temperature is controlled by utilizing the solubility difference of the sorbic acid and the isomers in the alcohol, and the crystallization efficiency is improved. Sorbic acid containing a low isomerization product is separated and recovered, so that the quality of a finished product is effectively improved.

The application discloses a method for selectively hydrogen-dealkylating aromatics and coupling xylene isomerization. + The method comprises the following steps: contacting aromatics, PX-lean C8 aromatics and a catalyst to perform selective hydrogen-dealkylation and xylene isomerization; wherein the catalyst comprises catalyst A, catalyst B and catalyst C, catalyst A is arranged upstream of catalyst B, and catalyst C is arranged downstream of catalyst B; wherein the catalyst A is a composite modified alumina; the catalyst B and the catalyst C are independently selected from group VIII metal modified molecular sieves. + The method provided by the application can concentrate a reaction unit to selectively hydrogen-dealkylate C8 10 C2 + The method can realize xylene isomerization in the PX-lean C8 aromatics while selectively hydrogen-dealkylating the side chains, and can cooperate with liquid phase transalkylation technology, so that an isomerization unit in an existing process is omitted, and device energy consumption, material consumption and investment are greatly reduced.

The application provides a ZSM-48 molecular sieve and a preparation method thereof, an isomerization dewaxing catalyst and a preparation method and application thereof, wherein the preparation method of the ZSM-48 molecular sieve comprises the following steps: uniformly mixing an aluminum source, a silicon source, an alkali source, a crystallization inducer, a template agent, deionized water, a pore-forming agent and a charge balancing agent, then sequentially pre-crystallizing the obtained gel solution at 70-90 DEG C for 2-6h, crystallizing at 120-140 DEG C for 2-6h, and crystallizing at 140-170 DEG C for 10-48h, washing, drying and calcining the crystallization product, mixing the obtained molecular sieve precursor with an ammonium salt, and then washing, drying and calcining to obtain the ZSM-48 molecular sieve. The carrier particle of the isomerization dewaxing catalyst comprises the ZSM-48 molecular sieve. The acid sites of the molecular sieve are uniformly distributed, the crystal grain size is small, and the total BET specific surface area is high. The isomerization dewaxing catalyst has high reaction efficiency and isomerization conversion rate and low cracking rate.

A process for producing branched aldehyde intermediates from alpha olefins, and further reacting said branched aldehyde intermediates via hydrogenation reactions, surfactant forming reactions and other chemical derivative forming reactions to produce branched alcohols, branched surfactants and other branched derivatives. A process for producing isomerized olefins, branched aldehydes, branched alcohols, branched surfactants and other branched derivatives through isomerization, hydroformylation, hydrogenation, surfactant forming reactions and other derivative forming reactions.