434 results about "Benzothiazole" patented technology

The invention discloses a preparation method of a dotenorad key intermediate, and belongs to the technical field of compound synthesis. In the preparation method of the dotenorad key intermediate, provided by the invention, 2-aminothiophenol and formaldehyde are used as raw materials to carry out cyclization reaction to prepare a compound as shown in a formula 1, and then the compound as shown in the formula 1 and 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 According to the method, 3-(3, 5-dichloro-4-methoxybenzoyl chloride)-2, 3-dihydro-1, 3-benzothiazole is used as a raw material, an amidation reaction is carried out on 3, 5-dichloro-4-methoxybenzoyl chloride in an aqueous solution of an organic solvent, and the key intermediate 3-(3, 5-dichloro-4-methoxybenzoyl)-2, 3-dihydro-1, 3-benzothiazole of dotenorad can be effectively prepared; the obtained dotenorad key intermediate is relatively high in yield and purity; moreover, benzothiazoline which is widely used in the prior art does not need to be used in the preparation method, an activating agent or a solubilizer does not need to be used, the operation method is simple, reaction conditions are mild, and the method is suitable for actual industrial production.

The invention belongs to the technical field of anticorrosive coatings, and particularly relates to a high-temperature-resistant hydrophobic anticorrosive coating as well as a preparation method and application thereof. The invention provides a high-temperature-resistant hydrophobic anticorrosive coating, which is prepared from the following raw material components in parts by weight: 100 to 140 parts of epoxy resin; 3 to 7 parts of 2-benzothiazole thiosuccinic acid; 2 to 6 parts of hydrophobically modified ZIF-67 (at) MgAlCeFe-LDH (layered double hydroxide); 4-8 parts of a filler; 2-6 parts of a dispersant; 1-3 parts of a defoaming agent; 2-4 parts of a coalescing agent; 15-35 parts of a curing agent; 20 to 30 parts of water; and 10 to 20 parts of ethanol. The hydrophobic property of the coating can be improved by adding hydrophobic modified ZIF-67 (at) MgAlCeFe-LDH, and the corrosion resistance of the anticorrosive coating is remarkably improved by matching with 2-benzothiazole thiosuccinic acid and utilizing the interaction between the ZIF-67 (at) MgAlCeFe-LDH and the 2-benzothiazole thiosuccinic acid. The anti-corrosion coating prepared by the method has excellent corrosion resistance, hydrophobic performance and high temperature resistance.

The invention discloses a copper surface micro-etching coarsening solution for a fine circuit as well as a preparation method and application of the copper surface micro-etching coarsening solution, and relates to the technical field of printed circuit board manufacturing. The copper surface micro-etching coarsening solution for the fine circuit is prepared from, by mass concentration, 60 g / L to 100 g / L of sulfuric acid, 40 g / L to 60 g / L of hydrogen peroxide, 0.5 g / L to 2 g / L of zinc sulfate, 10 g / L to 30 g / L of copper ions, 0.5 g / L to 1 g / L of pyridine heterocycle-containing Schiff base, 10 g / L to 100 g / L of ethyl alcohol, 1 g / L to 3 g / L of 2-mercaptobenzothiazole, 1 g / L to 5 g / L of methionine and 1 g / L to 5 g / L of polyacrylamide. According to the copper surface micro-etching coarsening solution, the 2-mercaptobenzothiazole and the methionine in the copper surface micro-etching coarsening solution can enable the copper surface to form a honeycomb structure under the low micro-etching amount, the zinc sulfate and the pyridine heterocyclic ring-containing Schiff base can form a composite film layer with copper ions on the surface of the honeycomb structure, and the interlayer binding force is improved.

The invention relates to the technical field of soil improvement, and discloses a soil improvement repairing agent and a preparation method thereof. The preparation method comprises the following steps: adding biochar, modified eugenol, modified benzothiazolyl pyridine, bacillus licheniformis and diatomite into a mixer, mixing and stirring, extruding and granulating in a granulator, and drying to obtain the soil improvement repairing agent. Eugenol can destroy a membrane structure and denature protein, so that a bacteriostatic effect is achieved, and a healthy soil microenvironment is provided for crops; the quaternary ammonium salt can destroy the membrane structure of pathogenic microorganisms, plays a role in killing the microorganisms, can improve the antibacterial effect of the remediation agent, and prevents and treats spread diseases of soil; nitrogen atoms and sulfur atoms in benzothiazolyl pyridine molecules can coordinate with free heavy metal ions in the soil, the heavy metal adsorption effect of the remediation agent is improved, the production value of the soil is gradually restored, meanwhile, boric acid capable of being absorbed by plants can be released through hydrolysis of pinacol ester, and the fertility of the soil is improved.

The invention discloses a continuous reaction device and method for producing 2-amino-4-methylbenzothiazole, and belongs to the technical field of compound production. The invention relates to a continuous reaction device for producing 2-amino-4-methylbenzothiazole, which comprises a first-stage reaction kettle and further comprises a stirring mechanism arranged in the first-stage reaction kettle and used for stirring chlorine and a mixed solution in the first-stage reaction kettle; the driving mechanism is arranged at the top of the first-stage reaction kettle and is used for driving the stirring mechanism to perform stirring action in the first-stage reaction kettle; the chlorine injection mechanism is connected with the stirring mechanism; the air exhaust mechanism is arranged at the top of the first-stage reaction kettle and is connected with the driving mechanism; the multistage reaction kettles are adopted for continuous operation to eliminate downtime, so that the problem of low production efficiency caused by repeated heating and cooling due to the use of intermittent reaction kettles in the traditional process is solved, the chlorine utilization rate is improved, and the production and processing cost is effectively reduced.

The invention relates to the field of automobile foot mats, and discloses a TPE composite material for an automobile foot mat and a preparation method thereof.The composite material comprises a bottom-layer plastic uptake material and a preset three-dimensional material fused on the surface of the bottom-layer plastic uptake material, and the preset three-dimensional material comprises SEBS, low-density polyethylene, EVA, modified nano titanium dioxide, color master batches and auxiliaries; the modified nano titanium dioxide is prepared by grafting a modified additive and nano titanium dioxide, wherein the modified additive is prepared by reacting a functional additive, 2-(2, 4-dihydroxyphenyl)-2H-benzotriazole and a modified antibacterial monomer; the functional additive is prepared by reacting a component I obtained by reducing 2-cyano-6-hydroxybenzothiazole with 5-methylisoxazole-3-formyl chloride; the component I is prepared by reducing 2-cyano-6-hydroxybenzothiazole with 5-methylisoxazole-3-formyl chloride; the modified antibacterial monomer is prepared by reacting benzothiazole-2-formaldehyde with 2, 6-dichloro-4-aminophenol and then reacting with 3-chloropropyltriethoxysilane, and the TPE composite material prepared by the invention can realize a multi-color or multi-pattern effect, and in addition, the material can be endowed with excellent ultraviolet aging resistance, heat resistance and antibacterial property.

The present invention discloses a high thermal conductivity rubber material and a preparation method thereof, and relates to the technical field of rubber production, the high thermal conductivity rubber material comprises a rubber matrix, modified carbon black, a vulcanizing agent, a composite accelerator, an anti-aging agent, zinc oxide, stearic acid, white carbon black, montmorillonite and aramid pulp according to a weight ratio of 100: (40-60): (1.5-3): (2-4): (1-3): (3-8): (1-3): (10-20): (5-15): (3-8); the modified carbon black is prepared by reacting a composite modifier solution prepared from a silane coupling agent, sodium alginate, ammonium polyacrylate, tea polyphenol, polyethyleneimine, nano aluminum oxide and deionized water with carbon black; the composite accelerant is prepared by carrying out pre-dispersion treatment on N-cyclohexyl-2-benzothiazole sulfenamide, tetramethylthiuram disulfide, a rare earth complex and nano zinc oxide. The prepared high-thermal-conductivity rubber material is good in mechanical property and thermal conductivity.

The invention relates to the technical field of sealing elements, in particular to rubber, a preparation method of the rubber, a fully-coated rubber O-shaped ring and a preparation method and application of the fully-coated rubber O-shaped ring. The rubber provided by the invention is prepared from the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer, 30-50 parts of a reinforcing agent, 5-10 parts of a plasticizer, 1-2 parts of an antioxidant, 1-2 parts of a stabilizer, 0.8-1.2 parts of a vulcanizing agent, 0.5-1 part of an accelerant, 3-5 parts of zinc oxide, 1-1.5 parts of stearic acid, 3-6 parts of a special modification additive, 2-5 parts of a preservative and 3-5 parts of a phosphate flame retardant, the content of vinyl in the ethylene propylene diene monomer is 55 wt%-65 wt%; the vulcanizing agent comprises a bis (dithiourea) vulcanizing agent and / or zinc diethyl dithiocarbamate; the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide, and the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide. The rubber has excellent corrosion resistance against special liquid oxidants (e.g., HAP).

The present application provides a compound containing hydroxyl triarylamine, which can be used as a light extraction material, and its structure is shown in formula (I). In formula (I), hydroxyl groups and benzoxazole or benzothiazole are introduced into the triarylamine main structure of the traditional light extraction layer material. The hydrogen atoms in the hydroxyl group can form intramolecular hydrogen bonds with the heteroatoms on benzoxazole or benzothiazole, thereby improving the planarity of the molecule and increasing the packing density between molecules. At the same time, this intramolecular hydrogen bond undergoes intramolecular proton transfer under light conditions to form a resonance structure. This process converts ultraviolet light energy into heat energy release instead of material deterioration caused by photochemical reactions, thereby reducing the damage caused by ultraviolet light to the device. In addition, the raw materials of the compound are easy to obtain, and it has higher economic value while ensuring good device protection function. The present application also provides an organic electroluminescent device and a display device. #imgabs0#

The invention discloses an iron-loaded sulfonated carbon nitride heterogeneous catalyst as well as a preparation method and application thereof, and belongs to the field of heterogeneous catalysts. The iron-loaded sulfonated carbon nitride heterogeneous catalyst consists of monatomic Fe and a sulfonated graphite phase carbon nitride carrier, so that the prepared iron-loaded sulfonated carbon nitride heterogeneous catalyst can catalyze the reaction of benzoxazole and absolute ethyl alcohol, is high in catalytic efficiency, can catalyze the reaction of benzimidazole or benzothiazole and absolute ethyl alcohol, and is high in catalytic efficiency. Therefore, 2-(1-hydroxyethyl)-benzimidazole or 2-(1-hydroxyethyl)-benzothiazole is synthesized, and concentrated acid does not need to be used as a catalyst in the synthesis process. The sulfonation degree of the iron-loaded sulfonated carbon nitride heterogeneous catalyst can be regulated and controlled, the iron-loaded sulfonated carbon nitride heterogeneous catalyst can catalyze the construction of a directional C-C bond, and the iron-loaded sulfonated carbon nitride heterogeneous catalyst keeps stable in the reaction process and can be recycled for 5 times or more.

The invention relates to the field of protective films, and discloses a liquid crystal light guide plate high-transmittance tpe protective film and a preparation method thereof.The protective film comprises SEBS, polypropylene, modified halloysite nanotubes, modified silicon dioxide and auxiliaries; the modified halloysite nanotube is prepared by reacting a functional additive prepared by grafting an isocyanato antioxidant component and a modified benzothiazole-containing monomer with 3-chloropropyltrimethoxysilane, and then grafting on the surface of the halloysite nanotube; the isocyanated antioxidant component is prepared by reacting 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with N-hydroxymethyl acrylamide, then reacting the product with 2-mercaptoethanol to obtain a hydroxylated antioxidant component, and then reacting the hydroxylated antioxidant component with isophorone diisocyanate; the modified benzothiazole-containing monomer is prepared by reacting 2-aminobenzothiazole with bromoacetyl bromide and then reacting with 3, 5-dihydroxybenzylamine, and the protective film prepared by the invention has good thermo-oxidative aging resistance, antibacterial property, heat resistance and tensile property.

The present invention relates to a method for large-scale production of a benzo [d] thiazole intermediate for preparing torametinib, and a method for large-scale preparation of torametinib using the intermediate, the method avoiding a column chromatography operation which is expensive and complicated to operate while significantly improving the yield of the benzo [d] thiazole intermediate, and the method for large-scale production of torametinib using the intermediate. And thus, the yield of the final product torametinib is improved. Therefore, according to the method, the cost is greatly reduced, the yield is improved, and the method is suitable for large-scale production.

The invention relates to a diptera adult insecticide, which contains an insecticidal functional component n-butyl alcohol. According to the invention, n-butyl alcohol which has an obvious poisoning effect on the adult cucurbita petiolatus is separated from a metabolite of a bacillus thuringiensis XLB2910 strain, and 2, 3, 5-trimethylpyrazine and benzothiazole which have an obvious poisoning effect on the adult aedes albopictus are also separated from the metabolite of the bacillus thuringiensis XLB2910 strain. Through poisoning concentration analysis of different components and a compound combination experiment, a series of pesticides for adult cucurbita petioles and adult aedes albopictus are formed, the prepared compound pesticide for cucurbita petioles comprises 2.5%-10% of 2, 3, 5-trimethylpyrazine, 2%-10% of benzothiazole and 5%-10% of n-butyl alcohol, and the prepared compound pesticide for aedes albopictus comprises 2.5%-10% of 2, 3, 5-trimethylpyrazine, 2%-10% of benzothiazole and 5%-10% of n-butyl alcohol. The composition comprises 0.5%-3% of 1, 3, 5-trimethylpyrazine, 0.05%-1.5% of benzothiazole and 1%-3% of n-butyl alcohol. The compound insecticide has a good insecticidal effect on cucurbita petiolatus adults and aedes albopictus adults, and is wide in raw material source and environment-friendly.

The invention discloses a tetrahydrocarbazole enhanced fluorescent probe for detecting hydrosulfite as well as a preparation method and application of the tetrahydrocarbazole enhanced fluorescent probe. The fluorescent probe is a 2-(2-(5-(2, 2-dimethyl-2, 3, 4, 9-tetrahydro-1H-1, 3-methyl carbazole-6-yl) furan-2-yl) vinyl)-3-ethyl benzothiazole-3-onium iodised salt compound, namely, TC-FV-BT, and the fluorescent probe can be applied to the field of fluorescence detection. The probe TC-FV-BT can be used for specifically recognizing the hydrosulfite. Under sunlight, after bisulfite is added into a DMF / H2O (2: 8, v / v) solution of the probe TC-FV-BT, the color of the solution is changed from dark pink to white, under irradiation of ultraviolet light with the wavelength of 365 nm, the solution emits orange fluorescence at the emission wavelength of 605 nm, the fluorescence color of the solution is changed from colorless to orange, the response time is 4 min, the detection limit of the bisulfite reaches 77.27 nM, and the detection limit of the bisulfite reaches 77.27 nM. The fluorescent probe shows good selectivity and anti-interference performance, and has a good application prospect in the fields of environmental analysis, food and the like as a fluorescent probe for detecting hydrosulfite.

The invention relates to 1,5-benzothiazepine and 1,2,5-benzothiadiazepine derivatives of formula (I). These compounds are bile acid modulators having apical sodium-dependent bile acid transporter (ASBT) and / or liver bile acid transport (LBAT) inhibitory activity. The invention also relates to pharmaceutical compositions comprising these compounds and to the use of these compounds in the treatment of cardiovascular diseases, fatty acid metabolism and glucose utilization disorders, gastrointestinal diseases and liver diseases.

The invention discloses a micromolecular bioluminescent probe capable of being used for monitoring in vivo / in vitro dipeptidyl peptidase IV in real time and a preparation method and application thereof.The probe is marked as DPP4-PD, during preparation, N-[t-butyloxycarbonyl] glycyl-L-proline and 6-amino-2-benzothiazole formonitrile serve as starting materials and then react with L-cysteine hydrochloric acid, and finally Boc is removed. The synthesis raw materials are easy to obtain, operation is simple, and popularization is easy. The micromolecular bioluminescence probe provided by the invention can specifically respond to DPP4 enzyme in vivo / in vitro in real time; and the probe has the remarkable advantages of high selectivity, high sensitivity, high stability, high biological safety, high signal-to-noise ratio (S / N) and the like during imaging, and has wide application prospects in the fields of pathological research, efficacy evaluation and new drug research and development.

The invention provides a copper etching solution with a high etching factor as well as a preparation method and application of the copper etching solution. The copper etching solution with the high etching factor comprises the following components in parts by weight: 0.48-3 parts of a corrosion inhibitor; 1-10 parts of an oxidizing agent; 10 to 20 parts of inorganic acid; 0.1-1 part of an organic solvent; 60 to 80 parts of ultrapure water; the corrosion inhibitor is a mixture of a benzothiazole corrosion inhibitor and an aminoimidazole corrosion inhibitor. The copper etching liquid with the high etching factor has the high etching factor, copper can be rapidly and efficiently removed, the side wall etching time is shortened, and therefore the product yield is increased. And the method has very good application prospect and large-scale industrial popularization potential in the field of circuit board packaging.

The invention discloses a preparation process of high-purity dotenorad, and belongs to the technical field of organic synthesis route design and raw material medicine and intermediate preparation. Benzothiazole is used as a starting material, reduction, acylation, amide condensation, oxidation, demethylation and other reactions are sequentially carried out, a dotenorad crude product is synthesized, and the required crystal form is obtained through recrystallization. The raw materials of the preparation method are cheap, easy to obtain and high in stability, the defect that the raw materials of other preparation processes are poor in stability is overcome, and the preparation method is convenient to operate and suitable for industrial production; the total yield of the prepared dotenorad in each step is 66.80%, and the purity of the dotenorad can reach 99.99%.

The invention discloses application of a fluorescent probe in simultaneous imaging of lysosome and nucleolus and nucleic acid detection, and belongs to the technical field of fluorescent probes. The invention discloses (E)-2-(4-(ethylamino)-2-hydroxyvinyl)-3-(2-ethoxyl) benzothiazole-3-iodised salt as a fluorescent probe capable of imaging lysosome and nucleolus at the same time, and as a fluorescent probe for detecting nucleic acid. The probe provided by the invention is a red fluorescent probe, which is helpful for imaging microstructures of cells and tissues. The lysosome and the nucleolus are closely related to diagnosis of various diseases (cancers and the like) and drug research and development. Therefore, the fluorescent compound provided by the invention can provide a more accurate and effective tool for research and application in the fields of chemical industry, biological medicine and the like.

This invention discloses an analytical method for benzothiazole contaminants, comprising the following steps: detection by high performance liquid chromatography (HPLC), with the following chromatographic conditions: a phenylhexyl column as the stationary phase, mobile phase A being water, mobile phase B being acetonitrile, and gradient elution; wherein the benzothiazole contaminants are at least one of 2-aminobenzothiazole, 2-hydroxybenzothiazole, benzothiazole, 2-methylbenzothiazole, 2-mercaptobenzothiazole, 2,5-dimethylbenzothiazole, 2-cyanobenzothiazole, ethyl 2-carboxylate benzothiazole, 2-chlorobenzothiazole, 2-bromobenzothiazole, 2-methylthiobenzothiazole, phenylthiocyanate, N-tert-butyl-2-benzothiazole sulfenamide, 2-(2-hydroxyphenyl)-benzothiazole, N-cyclohexyl-2-benzothiazole sulfinamide, dibenzothiazole disulfide, and N,N-dicyclohexyl-2-benzothiazole sulfonamide.

The present invention discloses a six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure, a preparation method thereof, and an application thereof. The six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure has the structural formula shown in (I). The preparation method comprises the following steps: weighing equimolar amounts of 2-aldehyde rhodamine B and 2-hydrazine benzothiazole, dissolving them in dry ethanol, heating to 80°C for reaction for 4 hours, cooling to room temperature, and distilling under reduced pressure. The obtained solid is purified by column chromatography to obtain a light pink solid, which is the six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure. The fluorescent probe of the present invention has good sensitivity to copper ions and can qualitatively and quantitatively detect copper ions in a solution.

The present invention discloses a BODIPY-based ratiometric fluorescent probe for detecting sulfite, its preparation method, and application. The fluorescent probe is 2,8-bis(2-(benzothiazol-2-yl)-2-cyanovinyl)-10-(furan-2-yl)-1,3,7,9-tetramethyl-5H-dipyrroledifluoroborane complex. The present invention utilizes 2,8-diformyl-10-(furan-2-yl)-1,3,7,9-tetramethyl-dipyrroledifluoroborane as a raw material, and carries out a condensation reaction with 2-(benzothiazol-2-yl)acetonitrile to obtain the compound 2,8-bis(2-(benzothiazol-2-yl)-2-cyanovinyl)-10-(furan-2-yl)-1,3,7,9-tetramethyl-5H-dipyrroledifluoroborane complex (abbreviated as BODIPY-DBC). When a solution of the compound BODIPY‑DBC reacts with sulfite, the solution changes color from purple to yellow under sunlight; under ultraviolet light at a wavelength of 365 nm, the solution's fluorescence changes from orange to green. BODIPY‑DBC can sensitively detect sulfite content in solutions, with high sensitivity (detection limit of 33.12 nM), fast response, good selectivity, and a wide detection range. It holds great promise as a fluorescent probe for sulfite detection.

The invention discloses a preparation method and application of a tridentate metal iridium complex, the preparation method of the tridentate metal iridium complex comprises the following steps: step 1, substituted 1, 3-benzene diformate and 2-aminothiophenol are subjected to cyclization reaction to obtain a first intermediate; 2, reacting iridium trichloride hydrate with the first intermediate obtained in the step 1 to obtain a second intermediate; and step 3, reacting an LX ligand with the second intermediate obtained in the step 2, and then using silver trifluoromethanesulfonate to obtain a target product. The tridentate clamp type metal iridium complex disclosed by the invention is composed of a substituted-1, 3-bis (benzothiazolyl) benzene main ligand, a 2, 2-dipyridyl or phenanthroline NN ligand and balanced chloride ions. The complex is simple in synthesis method and has high cytotoxicity to cervical cancer cells, colon cancer cells and lung cancer cells, and the in-vitro cell toxicity of the complex is obviously superior to that of clinically applied anti-tumor drug cis-platinum, so that the complex has a good application prospect in the field of metal anti-cancer drugs.

An attractant for Telenomus remus Nixon to control Spodoptera litura Fabricicus is provided. The attractant includes a solvent and at least one of the following components: 1,3-dichlorobenzene, benzothiazole, and octane. The attractant can effectively attract Telenomus remus Nixon to parasitize Spodoptera litura Fabricius eggs, such that the growth of a pest quantity is inhibited and the pest population gradually dies out, which achieves the purpose of pest control. The attractant is a green, non-toxic, and pollution-free attraction substance. Therefore, the attractant can solve a series of problems such as pesticide residues, environmental pollution, and food safety caused by chemical control, and is of great significance for the green control of Spodoptera litura Fabricius.

The invention discloses a flexible glass cutting fluid and a preparation method thereof, and the preparation method comprises the following steps: S1, adding cellobiose into DMF, then adding chloroacetic anhydride and pyridine, and carrying out a stirring reaction to obtain an intermediate; s2, adding the intermediate into DMF (Dimethyl Formamide), and then carrying out constant-temperature reaction on glycerol monocaprylate, 2-(2-hydroxyphenyl) benzothiazole and triethylamine to obtain a modifier; s3, uniformly mixing a modifier, sodium dioctyl sulfosuccinate and a polyoxyethylene polyoxypropylene block copolymer, so as to obtain a composite surfactant; s4, adding the composite surfactant, the propylene glycol, the defoaming agent, the sterilizing agent and the triethanolamine into the water, and uniformly stirring to obtain the cleaning agent. According to the prepared cutting fluid, the protection effect on a flexible glass base material and a surface functional layer of the flexible glass base material is remarkably improved while the excellent wettability is kept, microcrack generation and surface damage in the cutting process are reduced, and the cutting fluid is particularly suitable for precise glass processing of flexible display devices.

The invention provides a method for synthesizing nitrogen-substituted 2-aminobenzothiazole from 2-aminobenzothiazole, which comprises the following steps: in the presence of a Cu-MOF catalyst, carrying out C-N coupling reaction on a compound as shown in a formula II, a compound as shown in a formula III and an alkali solution to obtain a nitrogen-substituted 2-aminobenzothiazole compound as shown in a formula I; in the formula I and the formula III, R1 is independently selected from substituted or unsubstituted aryl respectively; in the formula I and the formula II, R2 is independently selected from halogen and / or alkyl respectively; in the Cu-MOF catalyst, the outer surface of an MOF material is coated with metal Cu, the Cu-MOF catalyst is of a porous structure, the porosity of the Cu-MOF catalyst is 12-18%, and the pore size of the Cu-MOF catalyst is 3-5. The preparation method provided by the invention is simple to operate, mild in reaction condition, relatively high in reaction efficiency and suitable for large-scale production, and has a wide application prospect.

The invention relates to the technical field of NBR composite materials, in particular to a low-temperature-resistant wear-resistant NBR composite material and a preparation method and application thereof. The invention provides a low-temperature-resistant wear-resistant NBR (nitrile-butadiene rubber) composite material, which is prepared from the following components in parts by mass: 100 parts of NBR raw rubber, 2 to 6 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 30 to 80 parts of carbon black, 1 to 3 parts of 2-mercaptobenzimidazole, 2 to 12 parts of oleylamine grafted halloysite nanotubes, 0.5 to 2 parts of sulfur and 0.5 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide. According to the low-temperature-resistant wear-resistant NBR composite material, the compatibility of the additive and the NBR raw rubber is good, and the blooming phenomenon is avoided.

The present application belongs to the technical field of fine chemical industry, and relates to a recycling method of accelerator M tar. In the waste M tar produced in M production, a catalyst is added, high-temperature decomposition is carried out under nitrogen protection, and recycled raw materials aniline, carbon disulfide and intermediate benzothiazole and the like are obtained, most of which are recycled. The present application adopts common equipment and unit operations, the catalyst can be reused, and the treatment of production waste is easy to realize industrial production.

The invention discloses a nitrogen-doped graphene composite material and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: S1, preparing a nitrogen-doped graphene material; s2, dissolving indium nitrate, 2-amino-benzothiazole and the nitrogen-doped graphene material in a DMF (Dimethyl Formamide) aqueous solution, carrying out hydrothermal reaction, cooling to room temperature, washing and freeze-drying to obtain a nitrogen-doped graphene / indium-based MOF (Metal Organic Framework) material; and S3, adding the nitrogen-doped graphene / indium-based MOF material into the lead acetate dispersion liquid, carrying out ultrasonic treatment, stirring and uniformly mixing, dropwise adding a 2g / L sodium hydroxide solution into the mixed liquid in a stirring state until the solution Ph is 8, then carrying out freeze drying, putting a dried sample into a tubular furnace, and calcining in an inert atmosphere to obtain the nitrogen-doped graphene composite material. When the prepared composite material is applied to the negative electrode of the lead-acid battery, the hydrogen evolution side reaction in the charging process of the negative electrode plate can be remarkably reduced, and the electrochemical performance of the battery is improved.