78 results about "Methylated naphthalene" patented technology

The invention discloses a composite material and application thereof in electrochemical carbon dioxide capture, and belongs to the technical field of electrochemistry and carbon dioxide capture. The composite material provided by the invention comprises a carbon felt and a 1, 4-naphthoquinone compound, the 1, 4-naphthoquinone compound is loaded on the carbon felt; the 1, 4-naphthoquinone compound comprises at least one of 1, 4-naphthoquinone, 2-methyl-1, 4-naphthoquinone or 2, 3-dimethyl-1, 4-naphthoquinone, and the compound is a compound of the 1, 4-naphthoquinone, the 2-methyl-1, 4-naphthoquinone and the 2, 3-dimethyl-1, 4-naphthoquinone. In the composite material disclosed by the invention, a 1, 4-naphthoquinone structure of the 1, 4-naphthoquinone compound can realize specific capture of CO2 through a reversible oxidation-reduction reaction, a carbon felt three-dimensional porous framework provides a smooth channel for CO2 mass transfer and electron transmission, and the 1, 4-naphthoquinone structure and the carbon felt three-dimensional porous framework cooperate with each other to solve the problems of low capture capacity, poor stability and high energy consumption of a traditional carbon material; therefore, the method has a good application prospect in electrochemical carbon dioxide capture.

The invention provides a method for separating 2-methyl-6-propionyl naphthalene through melt crystallization, which comprises the following steps: reacting 2-methylnaphthalene with propionic anhydride under the action of a catalyst to obtain a 2-methyl-propionyl naphthalene mixture; the 2-methyl-propionyl naphthalene mixture is distilled, and a 2-methyl-propionyl naphthalene crude product is obtained; and carrying out melt crystallization on the 2-methyl-acyl naphthalene crude product to obtain the 2-methyl-6-propionyl naphthalene. According to the method for separating the 2-methyl-6-propionyl naphthalene through melt crystallization, after the crude product of the 2-methyl-6-propionyl naphthalene is obtained through distillation and purification, the high-purity 2-methyl-6-propionyl naphthalene can be obtained through a melt crystallization one-step method. The method has the advantages of simple process operation, high separation efficiency, low energy consumption, high product purity and the like.

The invention provides a methylnaphthalene alkylation catalyst as well as a preparation method and application thereof. The methylnaphthalene alkylation catalyst is obtained by carrying out variable-pressure hydrothermal aging and acid pickling on an HMCM-22 molecular sieve; the external specific surface area of the methylnaphthalene alkylation catalyst is 100-140 m < 2 > / g, and the mesoporous volume is 0.8-1.5 cm < 3 > / g; the strong acid center at the temperature of 370-485 DEG C accounts for 80-90% of the weak acid center at the temperature of 200-350 DEG C; the total acid amount is 0.5 to 1.9 [mu] mol / NH3. The methylnaphthalene alkylation catalyst has good stability on the premise of ensuring high activity, is used for catalyzing alkylation of 2-methylnaphthalene and methanol to prepare 2, 6-dimethylnaphthalene, and has good selectivity on DMN and 2, 6-DMN.

The application provides a method for preparing beta-methylnaphthalene from a methylnaphthalene-containing fraction based on solution homogenization crystallization separation, and comprises the following steps: pumping the methylnaphthalene-containing fraction into a fluidized bed reactor, performing primary cooling treatment, and performing ultrasonic treatment through an ultrasonic device arranged on the inner wall of the fluidized bed reactor, and then filtering after the crystallization treatment; re-heating the solid in the fluidized bed reactor, then performing secondary cooling treatment and ultrasonic treatment at the same time, and then filtering after the crystallization treatment; re-heating the solid in the fluidized bed reactor, then performing third cooling treatment, and performing ultrasonic treatment at the same time, and then filtering after the crystallization treatment, collecting the filter residue, and then drying to obtain high-purity beta-methylnaphthalene. The method combines the fluidized bed reactor with the ultrasonic treatment technology, and adopts step-by-step crystallization, so that impurities are effectively removed, high-purity beta-methylnaphthalene is obtained, and the yield of the product is obviously improved.

The present disclosure provides compounds, compositions, and methods for reducing or preventing fouling in an industrial processes. A compound or composition may include a methylnaphthalene sulfonate-formaldehyde polymer and / or a sulfonated dispersant. An industrial process may include, for example, a chemical manufacturing process, such as an acrylonitrile manufacturing process. The disclosure also provides methods of manufacturing the compounds and compositions disclosed herein.

The invention discloses a method for directly preparing a racemic oxidation product from a fennerenone enantiomer through photocatalysis, and belongs to the technical field of organic synthesis.The method comprises the steps that an R-type fennerenone isomer is taken to be placed in a reaction bottle, a photosensitizer containing iridium or ruthenium is added, and a solvent is added at the speed of 0.1 M in the air atmosphere; the method comprises the following steps: dissolving 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2, 8-dimethyl-1, 6-naphthyridine-3-formamide in a solvent, stirring, transferring a mixture into a photoreactor of a blue light LED (Light Emitting Diode) with the wavelength of 455-465 nm, stirring, transferring a mixed solution after the reaction is finished into a round-bottom flask, purifying a volatile solvent to obtain a product 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2, 8-dimethyl-1, 6-naphthyridine-3-formamide, and carrying out chiral HPLC (High Performance Liquid Chromatography) analysis on the product. High temperature, high pressure or a strong oxidant is not needed, and reaction conditions are mild; oxygen in air is oxidized at room temperature, so that energy consumption and pollutant generation are reduced; compared with the traditional oxidation condition, the method does not need to undergo the process of oxidation first and then high-temperature induced racemization, and the racemization product can be directly obtained.

The invention relates to a synthesis method of 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1, 4-dihydro-2, 8-dimethyl-1, 6-naphthyridine-3-formamide, which comprises the following four steps: carrying out a Knoevenagel condensation reaction, carrying out a Hantzsch dihydropyridine synthesis method, carrying out an O-ethylation reaction and carrying out a deprotection reaction to synthesize the 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1, 4-dihydro-2, 8-dimethyl-1, 6-naphthyridine-3-formamide, and carrying out a reaction to obtain the 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1, 4-dihydro-2, 8-dimethyl-1, 6-naphthyridine-3-formamide. The preparation method of the 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1, 4-dihydro-2, 8-dimethyl-1, 6-naphthyridine-3-formamide has the advantages that the selectivity is high, the post-treatment is simple, the yield and the purity of the product are high, a new synthesis route and method are developed for synthesizing the 4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1, 4-dihydro-2, 8-dimethyl-1, 6-naphthyridine-3-formamide, the amplified production is conveniently realized, and the method is suitable for industrial production. The method has good application potential and research value.

The invention discloses a preparation method of a low-pore-number composite lining, and belongs to the technical field of textiles. The preparation method of the low-hole-number composite lining comprises the following steps: (1) weaving polyester yarns into gray fabric; (2) shaping and preshrinking the gray fabric; (3) dyeing the set and pre-shrunk gray fabric; (4) shaping and finishing the dyed gray fabric to obtain a composite lining; wherein the dye for dyeing is obtained by reacting N-amino-4-N, N-dimethyl-1, 8-naphthalimide with ferrocene dicarboxaldehyde, and the dye for dyeing is obtained by reacting N-amino-4-N, N-dimethyl-1, 8-naphthalimide with ferrocene The setting agent for setting and finishing contains a hydrophilic softening agent, the hydrophilic softening agent is obtained by mixing polyether phenyl silicone oil with a compound emulsifier and deionized water, and the polyether phenyl silicone oil is obtained by reacting side chain hydrogen-containing silicone oil, allyl alcohol polyoxyalkyl ether, vinyltriethoxysilane and 1-(4-vinyl-phenyl)-ethanone; the prepared low-hole-number composite lining is good in hydrophilicity, color fastness and softness.

The embodiment of the invention provides an alkyl naphthalene sulfonate antirust agent produced through methylnaphthalene alkylation, and relates to the technical field of synthesis of petroleum sulfonate antirust agents. A method for producing an alkyl naphthalene sulfonate antirust agent through methylnaphthalene alkylation comprises the following steps: adding high-purity methylnaphthalene into a reaction kettle, adding a Lewis acid catalyst, uniformly stirring and mixing, slowly adding C9-C12 olefin into a reaction system in a dropwise adding manner under a stirring condition, dropwise adding for 30 minutes to 2 hours, and after the dropwise adding is finished, cooling to room temperature to obtain the alkyl naphthalene sulfonate antirust agent. After the dropwise adding is finished, continuously keeping the temperature, stirring and reacting for 2-4 hours, and cooling to room temperature after the reaction is finished, so as to obtain a reaction mixture containing alkyl naphthalene. The alkyl naphthalene sulfonate with clear components, high purity and excellent anti-rust performance is prepared by optimizing the molar ratio and reaction conditions of methylnaphthalene and olefin and combining an efficient purification process, green and efficient preparation of the anionic surfactant with controllable raw materials and stable quality is realized, and the method has a good industrial application prospect.

The invention provides a naphthalene aromatic hydrocarbon alkylation catalyst as well as a preparation method and application thereof. The naphthalene aromatic hydrocarbon alkylation catalyst is an MCM-22 molecular sieve loaded with a metal element, and the naphthalene aromatic hydrocarbon alkylation catalyst contains 0.1-4.0% of the metal element based on 100% of the mass of the naphthalene aromatic hydrocarbon alkylation catalyst; the metal elements comprise one or a combination of more than two of Fe, Co, Ni, Cu, Zn and Cr. The naphthalene aromatic hydrocarbon alkylation catalyst can be used for converting carbon monoxide and / or carbon dioxide into 2, 6-dimethylnaphthalene with high added value, and has the advantages of short process route, environmental protection, low carbon, high conversion rate of carbon monoxide and / or carbon dioxide, high alkylation rate of naphthalene aromatic hydrocarbon and high long-period stability.

The present application relates to a kind of device and method for extracting high-purity chemicals from coal tar wash oil fraction, comprising: naphthalene separation column, methylnaphthalene separation unit, acenaphthene-fluorene-dibenzofuran separation unit;Methylnaphthalene separation unit includes methylnaphthalene separation tower, β-methylnaphthalene subunit and α-methylnaphthalene subunit connected in sequence;Acenaphthene-fluorene-dibenzofuran separation unit includes light removal tower, acenaphthene subunit, dibenzofuran subunit and fluorene subunit connected in sequence;The material outlet of the bottom of naphthalene separation column is connected with methylnaphthalene separation tower;The material outlet of the bottom of methylnaphthalene separation tower is connected with the material inlet of light removal tower.The device provided by the present application can effectively extract target chemicals in coal tar wash oil fraction by reasonable configuration of the device and coupling cooperation between devices, and obtain high-purity products.Compared with existing wash oil extraction chemical technology, it has higher efficiency, wider applicability and better product quality.

The invention relates to the technical field of production of 2, 6-dimethylnaphthalene, and discloses a production method and a production system of 2, 6-dimethylnaphthalene, and the production method comprises the following steps: (1) under a liquid phase condition, in the presence of an alkyl transfer catalyst, contacting reaction raw materials with a transfer alkylating agent to obtain a product mixture; the content of the 2, 6-dimethylnaphthalene is not less than 15wt% on the basis of the total content of the bicyclic aromatic hydrocarbon in the product mixture; (2) rectifying the product mixture to obtain a light component and a heavy component containing the dimethylnaphthalene isomer, and returning the light component to the step (1) to provide at least part of reaction raw materials; (3) mixing the heavy component obtained by rectification with a complexing agent, carrying out complexing crystallization, and then carrying out alkali washing to obtain a 2, 6-dimethylnaphthalene crude product; and (4) mixing the 2, 6-dimethylnaphthalene crude product with a solvent, and recrystallizing. The method has the advantages of high purity and high yield of the 2, 6-dimethylnaphthalene.

The invention provides a catalyst for preparing 2, 6-dimethylnaphthalene by catalyzing alkylation of 2-methylnaphthalene as well as a preparation method and application of the catalyst. The catalyst is prepared from the following components in percentage by mass: 60 to 90 percent of H-type boron modified MCM-22 molecular sieve and 10 to 40 percent of binder, wherein the mass of the H-type boron modified MCM-22 molecular sieve is 100 percent. The catalyst has high reaction activity and high stability at the same time.

The invention provides a catalyst for preparing 2, 6-dimethylnaphthalene by catalyzing alkylation of 2-methylnaphthalene as well as a preparation method and application of the catalyst. The catalyst is obtained by carrying out metal element modification on an HMCM-22 molecular sieve by adopting an ion exchange method, and the catalyst contains 0.4-3.6% of metal elements based on 100% of the mass of the catalyst; the metal element is a rare earth metal element or a transition metal element. The catalyst has good reaction stability on the premise of ensuring high reaction activity.

The present application relates to a kind of preparation methods of sodium bisulfite menadione, which is prepared by the reaction of 2-methyl-1,4-naphthoquinone and sodium bisulfite in the presence of K2O-MgO / Al2O3 as an aid in the mixed solution of organic solvent and water.The present application makes the conversion rate of raw materials >99% by introducing K2O-MgO / Al2O3 as an aid, the selectivity is greater than 95%, and can reduce the phenol, quinone impurities (content <800ppm) in the product.The process is simple, the reaction condition is mild, the process is stable, the purity of product is more than 98%, and the total yield is more than 94%.

The application discloses a method for cracking tar into high value-added products, which adopts a route of separating light components by fractional distillation and then hydrogenating heavy components, so that the yield of target products can be affected by hydrogenation of naphthalene, methyl naphthalene and the like below 250 DEG C in the process of hydrocracking, and on the other hand, the components below 250 DEG C account for about 30% to 50%, so that the hydrogen consumption in the subsequent hydrocracking can be reduced by separating the components in advance. After the heavy fraction is subjected to hydrocracking, part of polycyclic aromatic hydrocarbons in the heavy fraction can be cracked into part of monocyclic aromatic hydrocarbons, which can be used for producing aromatic solvent oil, so that the light fraction in the hydrocracking product is separated and mixed into the light fraction generated by pre-fractionation, and the next step processing is carried out, so that the yield of high value-added products can be further improved.

The invention discloses a dispersant composition solution and application thereof in preparation of a liquid disperse dye. The dispersant composition comprises a graft copolymer A, a wetting agent B and a defoaming agent C. Wherein the grafted copolymer A is a beta-sodium naphthalene sulfonate or methyl sodium naphthalene sulfonate grafted polymer of sodium lignin sulfonate. The high-efficiency dispersing agent composition solution provided by the invention can be applied to preparation of a liquid disperse dye, the mass ratio of the dispersing agent composition to the disperse dye is (1: 2)-(1: 10), and the solid content of the liquid disperse dye is 30%-50%. Compared with a traditional dispersing agent, the dispersing agent composition has the advantages that the color depth value is obviously reduced, and the contamination to fibers is reduced. The liquid disperse dye prepared by using the dispersant composition shows excellent performance in the aspects of grinding efficiency, reduction hydrolysis rate, high-temperature dispersion stability and the like.

The invention belongs to the field of medicinal chemistry, and discloses a deubiquitinating enzyme USP28 small-molecule inhibitor and a preparation method and application thereof, the general formula of the deubiquitinating enzyme USP28 small-molecule inhibitor is as follows: in the formula, A ring is selected from substituted or non-substituted C5-6 aromatic ring; an indole ring; 2, 4, 5-benzothiazole ring; and a substituted or non-substituted C5-6 aromatic heterocyclic ring, wherein a heteroatom is selected from N, O or S. R1 is selected from hydrogen, nitryl, hydroxyl and halogen; the compound is selected from the group consisting of phenyl, phenyl, phenyl, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, phenylamino, r < 2 > is selected from tetrahydroisoquinolyl or tetrahydroisoquinolyl substituted by one or more halogens or methyl groups, phenyl-N, N-dimethyl methylamino, N-methyl phenyl methylamino, methyl tetrahydropyridoxyl, N, N-dimethyl methylaniline or N, N-dimethyl naphthyl amino or N, N-dimethyl halogenated anilino, R < 2 > is selected from tetrahydroisoquinolyl or tetrahydroisoquinolyl substituted by one or more halogens or methyl groups, phenyl-N, N-dimethyl methylamino, N-methyl phenyl methylamino, methyl tetrahydropyridoxyl, N, N-dimethyl methyl anilino or N, N-dimethyl naphthyl amino or N, N-dimethyl halogenated anilino. The compound shows good selective inhibitory activity on USP28 enzyme, and has a good application prospect when being used as an active component for preparing USP28 inhibitor drugs.

The present invention provides a method for continuously preparing 2,6-dimethylnaphthalene. The method comprises: alternately introducing a gas-phase carrier and a liquid-phase carrier into a fixed-bed reactor, mixing the gas-phase carrier and the liquid-phase carrier with liquid reaction starting material continuously fed into the fixed-bed reactor, and bringing the reaction starting material into contact with a solid acid catalyst bed in the fixed-bed reactor to perform isomerization, thereby obtaining 2,6-dimethylnaphthalene. The preparation method involves a simple process and has low energy consumption.

The invention discloses a method for preparing 2-methyl-6-acyl naphthalene, which comprises the following steps: S1, mixing aluminum trichloride crystals with triethylamine hydrochloride powder under the protective atmosphere and anhydrous condition to obtain ionic liquid; s2, under a protective atmosphere, dropwise adding acyl chloride into the ionic liquid to obtain an acylation reagent of acyl chloride; s3, dissolving 2-methylnaphthalene to obtain a 2-methylnaphthalene solution; s4, adding an acylation reagent into the 2-methylnaphthalene solution under a protective atmosphere and a low-temperature condition, and stirring to react; and S5, after the reaction, quenching the reaction product by using a hydrochloric acid solution, then extracting, neutralizing the extract, and drying to obtain the 2-methyl-6-acyl naphthalene product. The method for preparing the 2-methyl-6-acylnaphthalene is different from the prior art, the method abandons the use of a toxic polar solvent and a strong mixing mode, and many problems caused by the polar solvent and the strong mixing mode do not exist in the preparation process of the 2-methyl-6-acylnaphthalene.

The application discloses a hydrogen type ZSM-5 / ZSM-12 / SAPO-11 composite molecular sieve and a preparation method and application thereof, and belongs to the fine chemical industry field. The preparation method comprises the following steps: uniformly mixing ZSM-5 pre-crystallization solution, ZSM-12 pre-crystallization solution and SAPO-11, co-crystallizing at 150-200 DEG C for 1-4 days, and then performing primary calcination to obtain the ZSM-5 / ZSM-12 / SAPO-11 composite molecular sieve. The composite molecular sieve disclosed by the application has the advantages of high activity, good 2,6-DMN selectivity and carbon deposition resistance, the molar ratio of 2,6-DMN to 2,7-DMN in the product is high, the separation difficulty is relatively low, and the composite molecular sieve has great industrial application prospect in the preparation of 2,6-DMN through the catalytic naphthalene / 2-methylnaphthalene methanol alkylation reaction.

Polyester copolymeric materials include 40 to 51 mol % substituted naphthalate units, such as dimethyl-2,6-naphthalene dicarboxylate units, 10 to 40 mol % ethylene units, and 10 to 40 mol % hexane units. The polyester copolymers can be used to prepare multi-layer optical films by coextrusion and / or co-stretching. The copolyester polymeric materials have desirable optical properties and permit thermal processing at lower temperatures.

A process for obtaining {{6-[(diethylamino)methyl]naphthalen-2-yl}methyl [4-(hydroxycarbamoyl)phenyl]carbamate and / or pharmaceutically acceptable salts thereof having high purity is described. This process allows to obtain a product having an amount of any single unknown impurity equal to or less than 0.10%, as well as a product having a purity greater than 99.5%, preferably equal to or greater than 99.6%.An HPLC method for determining the purity of the product and possible impurities thereof is also described.

The structural formula of the thymol-containing quaternary ammonium salt derivative is shown as (1), wherein R1 is 2-isopropyl-5-methylphenyl, ethyl or a benzene ring, R2 is 2-chloro-5-methylthiophene, 3-methyl-2-methoxycarbonyl furan, 4-methylnaphthalene and differently substituted benzyl, X-is Cl-and Br-, and n is equal to 3, 5, 7, 8 and 9. The preparation method of the drug-loaded antibacterial liposome comprises the step of jointly assembling hydrogenated soybean phosphatidylcholine, cholesterol hemisuccinic acid monoester, phosphatidyl ethanolamine and a target compound thymol-containing quaternary ammonium salt derivative into the drug-loaded antibacterial liposome. Part of the compounds have excellent antibacterial activity on Xanthomonas oryzae pv. Oryzae, Xanthomonas citri and Xanthomonas syringae pv. Kiwifruit. Meanwhile, the compound also has excellent biological activity on six fungi such as fusarium oxysporum and TMV viruses. A field test on Xoo shows that the protection effect of the drug-loaded antibacterial liposome is improved by 1.94 times, the treatment effect is improved by 1.56 times, and the drug-loaded antibacterial liposome shows remarkable pH-triggered release characteristics and colloidal stability. (1)

The application discloses a continuous centrifugal electrolysis process and device for synthesizing 2-methyl-1,4-naphthoquinone. The application utilizes a flow separation electrolytic cell to cyclically electrolytically oxidize a cerous methanesulfonate-methanesulfonic acid solution to form a solution rich in ceric methanesulfonate; the solution rich in ceric methanesulfonate is continuously fed into a reactor, and in the reactor, the solution reacts with beta-methylnaphthalene to generate 2-methyl-1,4-naphthoquinone; during the reaction, an oil-water mixture in the reactor is continuously extracted into a centrifugal extractor to separate the oil phase and the water phase, the separated oil phase is fed back into the reactor, and the separated water phase is fed into the flow separation electrolytic cell to be electrolytically oxidized to regenerate Ce 4+ The application realizes efficient regeneration and reuse of cerium ions, reduces the amount of electrolyte and improves the reaction yield, and effectively reduces the process cost of scale-up.

The invention relates to an iron trioxide-based catalyst for naphthol gas-phase methylation, and a preparation method and application thereof. A preparation method of an iron trioxide-based catalyst for naphthol gas phase methylation comprises the following steps: mixing Fe < 3 + > salt, cocatalyst metal salt, a composite template agent and a pore forming agent, and carrying out a coprecipitation reaction to form a composite precipitate; adding dispersion liquid containing nano reinforced fibers into the composite precipitate, mixing to form uniform slurry, filtering, drying, grinding, and sieving to obtain catalyst precursor powder; and carrying out gradient calcination and surface acid-base property regulation and control treatment, mixing with a binder, granulating, molding, and calcining to obtain the catalyst. Compared with an original catalyst, the reaction temperature of the catalyst is greatly reduced by 50 DEG C or above, the non-decay time is prolonged from 2 months to 6 months or above during fixed bed continuous reaction, the high activity is kept, meanwhile, the naphthol conversion rate is larger than or equal to 99%, and the 2-methyl-1-naphthol selectivity is improved to 99% or above.

The invention relates to the technical field of fine chemical separation, in particular to a purification method of 2, 6-dimethylnaphthalene, which comprises the following steps: step A, carrying out vacuum rectification on raw oil containing 2, 6-dimethylnaphthalene in a vacuum rectification tower, and segmenting to obtain dimethylnaphthalene-rich fraction; step B, adding a complexing extraction agent into the dimethylnaphthalene-rich fraction for complexing extraction, and separating to obtain crude 2, 6-dimethylnaphthalene; and step C, carrying out solvent crystallization on the crude 2, 6-dimethylnaphthalene in an organic solvent, and filtering and separating to obtain a high-purity 2, 6-dimethylnaphthalene crystal. According to the method, the high-purity 2, 6-dimethylnaphthalene is simply and efficiently extracted from the petrochemical product, and the 2, 6-dimethylnaphthalene obtained by the purification method is high in purity, simple in process and green and environment-friendly.

The invention provides an imidazole cobalt complex and a preparation method and application thereof, and the preparation method of the imidazole cobalt complex comprises the following steps: step 1, adding substituted imidazole and 1, 2-dibromoethane into a first solvent, carrying out water bath heating reaction to obtain a turbid liquid, filtering to obtain a precipitate, and recrystallizing the precipitate; step 2, mixing the precipitate with cobalt salt, adding a second solvent into the mixture, and carrying out heating reflux reaction; and after the reaction is finished, filtering, washing and drying to obtain the imidazole cobalt complex. The imidazole cobalt complex has the advantages of stable steric configuration, mild reaction conditions, high catalytic performance and the like, the synthesis process is simple, the central metal is cheap and easy to obtain, and industrial production is easy to realize. The imidazole cobalt complex disclosed by the invention has a good application prospect and large-scale popularization potential in the field of catalytic oxidation of dimethylnaphthalene reaction.

The application discloses a kind of Beta-ZSM-12 composite molecular sieve synthesized by kaolin and a preparation method and application thereof, belong to molecular sieve catalyst technical field.The composite molecular sieve uses kaolin as only aluminum source and part of silicon source, particle size range is 300~3000nm, specific surface area is 600~1000m² / g, pore volume is 0.1~0.5cm³ / g, mesopore size is 2~10nm.Its preparation method includes: after kaolin is treated in alkali solution, Beta seed crystal is prepared by adding template agent and silicon source;Beta-ZSM-12 composite molecular sieve is prepared by kaolin, template agent, silicon source and Beta seed crystal as raw material, by hydrothermal crystallization, calcination and other steps.The composite molecular sieve can be applied to the product containing 2,6-dimethylnaphthalene generated by aromatic hydrocarbons alkylation reaction, and the product containing mesitylene generated by aromatic hydrocarbons isomerization reaction, with higher catalytic activity and selectivity.

The invention discloses an isoquinoline-5-formic acid coordinated catalyst, a composite catalyst, a preparation method and application, the chemical general formula of the isoquinoline-5-formic acid coordinated catalyst is shown in the specification, and the composite catalyst comprises the isoquinoline-5-formic acid coordinated catalyst, an auxiliary catalyst, a regulator, a protective agent and a solvent, by using the isoquinoline-5-formic acid coordinated catalyst or composite catalyst provided by the invention, the selectivity of the oxidation reaction of 4-methyl-1-naphthoic acid can be improved, the reaction activity can be increased, and the catalyst or composite catalyst can be used repeatedly and has a relatively high utilization rate.