257 results about "Cyclohexanone" patented technology

The invention relates to the technical field of sealing strips, and provides a tensile rubber sealing strip for an automobile and a preparation method of the tensile rubber sealing strip. The rubber sealing strip is prepared from, by weight, 65-75 parts of ethylene propylene diene monomer, 25-35 parts of chloroprene rubber master batch, 30-40 parts of thermoplastic polyurethane elastomer, 30-40 parts of filler, 1-2 parts of vulcanizing agent, 8-12 parts of vulcanization accelerator, 3-5 parts of plasticizer, 3-5 parts of anti-aging agent, 1-2 parts of stearic acid and 2-4 parts of zinc oxide, and the chloroprene rubber master batch is prepared from chloroprene rubber and 4-N-carbobenzoxy amino cyclohexanone. By means of the technical scheme, the problem that in the prior art, the rubber sealing strip is insufficient in tensile property is solved.

The invention discloses a synthesis method of piperonone, and relates to the technical field of flavors, fragrances and chemical engineering, and the synthesis method comprises the following steps: taking acrylate as a raw material, and carrying out Michael addition reaction with isobutene under the action of Lewis acid to obtain 5-methyl-5-hexenoic acid ethyl ester; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on ethyl 5-methyl-5-hexenoate and bromoisopropane under the action of a basic catalyst to obtain ethyl 5-methyl-2-isopropyl-5-hexenoate; carrying out self Friedel-Crafts acylation reaction on the 5-methyl-2-isopropyl-5-hexenoic acid ethyl ester under the action of Lewis acid, so as to obtain 5-methyl-2-isopropyl-5-chloro cyclohexanone; and carrying out elimination reaction on the 5-methyl-2-isopropyl-5-chlorocyclohexanone under the action of alkali to obtain the product piperonone. According to the synthetic route, conventional chemical reagents are used as raw materials, reaction conditions are mild, emission of three wastes is reduced to a great extent, and the synthetic route is more environmentally friendly and suitable for continuous industrial production.

The invention relates to a method for continuously producing poly (p-dioxanone), which comprises the following steps: premixing glycollic acid or a glycollic acid derivative with a ring formation catalyst, and introducing the obtained mixed material and ethylene oxide into a synthesis reaction kettle for reaction; separating and purifying the obtained reaction product, introducing the obtained purified monomer into a polymerization reaction kettle, and adding a polymerization catalyst for polymerization; after polymerization is finished, discharging is conducted, residual materials in the polymerization reaction kettle are subjected to depolymerization treatment to clean the kettle body, after depolymerization is finished, depolymerization products generated in the depolymerization treatment process are discharged, the kettle does not need to be opened for cleaning, and the next round of polymerization production is directly conducted. According to the method disclosed by the invention, the steps of synthesizing the p-dioxanone monomer, separating and purifying the monomer, catalyzing and polymerizing, depolymerizing and cleaning the kettle body and the like are continuously carried out, so that the continuous production of the poly (p-dioxanone) is realized, the side reaction of oligomerization and degradation of the p-dioxanone in storage and transportation can be avoided, and the production cost of the poly (p-dioxanone) is obviously reduced.

The present invention relates to the technical field of organic synthesis. Provided is a method for preparing 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone, comprising the following steps: S1, subjecting 4-nitrobenzaldehyde and trimethylsilyl azide to a nucleophilic aromatic substitution reaction to obtain 4-azidobenzaldehyde; S2, subjecting 4-azidobenzaldehyde and 4-methylcyclohexanone to an aldol condensation reaction, so as to obtain 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone. The described technical solution addresses the problems in the related art where the process for synthesizing 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone has low product yield, high costs and high energy consumption, and is not conducive to large-scale industrial production.

The invention discloses aquadag for an alkaline battery and application of the aquadag. The aquadag comprises the following raw materials in percentage by weight: 12-16% of graphite powder, 5-8% of conductive carbon black, 1-2% of graphene, 15-18% of epoxy resin, 30-50% of butanone and 10-20% of cyclohexanone. The preparation method of the aquadag comprises the following steps: (1) uniformly stirring butanone and cyclohexanone to obtain a composite solvent; (2) adding solid epoxy resin into the composite solvent, and stirring at 800-1000 rpm to completely dissolve the solid epoxy resin; (3) slowly adding graphite powder and conductive carbon black graphene into the composite solvent, and dispersing at a high speed of 1100-1200 rpm for 45-50 min to obtain a mixture; and (4) carrying out ball milling on the mixture, sieving with a 200-mesh sieve, and discharging to obtain the aquadag. The graphene is doped into the aquadag, so that the technical effect of improving the comprehensive performance of the battery is achieved.

The invention discloses a process method for co-production of caprolactone and 2, 4-dimethyl benzoic acid. According to the method, cyclohexanone is taken as a raw material, oxygen is introduced as an oxidant, 2, 4-dimethyl benzaldehyde is added as a pro-oxidant, and caprolactone and 2, 4-dimethyl benzoic acid are generated through oxidation reaction. According to the technological method, oxygen and 2, 4-dimethyl benzaldehyde are used as a co-oxidation system, in the presence of the carbon framework material loaded Ti-based catalyst, cyclohexanone can be subjected to oxidation reaction under mild conditions to generate caprolactone, the reaction is safe and efficient, the selectivity of the product caprolactone and the co-product 2, 4-dimethyl benzoic acid is high, the raw material conversion rate is high, and the method is suitable for industrial production. The product yield can be obviously improved, and the economic applicability is good.

This invention discloses a low-to-medium temperature cyclohexanol dehydrogenation catalyst for cyclohexanone and its preparation method. The catalyst uses organomontmorillonite as a support, and copper species are loaded onto the support using an impregnation method. The copper ion content is 1%–20% by mass of the catalyst, and 0.1%–2% of an additive is added. After washing, drying, and calcination, the organomontmorillonite-supported copper catalyst is obtained. The catalyst prepared by this invention has high specific surface area, high activity, and stability. Under relatively low reaction conditions and with low copper content, the catalyst still exhibits good cyclohexanol conversion and cyclohexanone selectivity. Furthermore, due to the low reaction temperature, the aggregation of the active components of the catalyst is not significant, resulting in good stability.

This invention discloses a method for preparing a supported cerium-chromium bimetallic catalyst and its application. First, an appropriate amount of modified alumina nanoparticles are dispersed in water. While stirring thoroughly, a certain amount of cerium and chromium sources are added, and stirring continues. Then, the mixture is heated to a certain temperature to evaporate the water. The resulting solid mixture is transferred to a covered crucible and calcined at a given temperature for a certain time. Finally, the obtained catalyst is ground into powder for later use. Under the action of the supported bimetallic catalyst, cyclohexane and an oxidant are thoroughly mixed in an organic solvent, heated, and reacted to produce cyclohexanone / alcohol. The cyclohexane catalytic oxidation method disclosed in this invention has a simple process, mild reaction conditions, requires no additives, and has low equipment requirements. Furthermore, the disclosed supported catalyst exhibits high catalytic activity, good stability, and no significant decrease in activity after multiple cycles, demonstrating good prospects for industrial application.

The invention discloses a near-infrared two-window fluorescent probe for detecting viscosity as well as a preparation method and application thereof, belongs to the technical field of biological fluorescence imaging contrast agents, and provides a structural formula of a viscosity probe and a preparation method of the near-infrared two-window fluorescent probe for detecting viscosity. Comprising the following steps: S1, cyclohexanone and 4-diethylaminoketonic acid are subjected to a reaction in concentrated sulfuric acid, and a solid product (a compound 1) is obtained through post-treatment; and S2, carrying out a reaction on the compound 1 obtained in the step S1 and 9-aldehyde julolidine in an ethanol solution. And carrying out post-treatment to obtain solid R-CHO. The detection method disclosed by the invention has the advantages of simplicity and convenience in operation, rapidness, accuracy, high sensitivity and the like, and is suitable for biomedical research, clinical diagnosis and other related fields.

The present application relates to a kind of bio-based surface treatment agent and its preparation method, belong to the technical field of treating agent.The raw material of bio-based surface treatment agent provided by the present application includes polyol PE-6056, isocyanate XFLO100, catalyst, CHDI, anti-sedimentation auxiliary agent, solvent, the solvent includes butanone, tetrahydrofuran, acetone, dimethylformamide, cyclohexanone, the bio-based surface treatment agent prepared has good initial adhesion, peeling strength when using, hydrolysis resistance and ageing resistance, with good application prospect.

The invention relates to the technical field of sol agents, in particular to a hot melt adhesive scavenger. The hot melt adhesive scavenger is specifically prepared from the following components in parts by weight: 10 to 15 parts of dodecylbenzene sulfonic acid, 15 to 20 parts of N-methyl pyrrolidone, 5 to 10 parts of dimethyl sulfoxide, 5 to 10 parts of crosslinked polystyrene resin, 10 to 20 parts of cyclohexanone, 15 to 20 parts of propylene glycol phenyl ether, 2 to 5 parts of modified fumed silica and 0.5 to 1 part of benzotriazole. Through the synergistic effect of the organic acid and the polar solvent, the internal structural force of the adhesive and the adhesive force with a screen are destroyed, and meanwhile, the hot melt adhesive scavenger with good cleaning efficiency and stability is obtained by compounding various components.

The application discloses a preparation method of a palladium-iron-based catalyst. A carbon carrier is added into an iron precursor solution, and after impregnation, solid-liquid separation, washing, drying and calcination in an oxygen-containing atmosphere, an iron and carbon mixed carrier is obtained. Then the mixed carrier is impregnated in a palladium precursor solution, and after separation, washing and drying, the palladium-iron-based catalyst is obtained after reduction. The palladium-iron-based catalyst prepared by the method has high dispersion and stable palladium. In the reaction of selective hydrogenation of phenol to cyclohexanone, the conversion rate of phenol and the yield of cyclohexanone are both higher than 95%, and the catalyst has good catalytic stability.

Disclosed in the present invention is a method for directly preparing a phenol and an aldehyde or a ketone from an alkyl aromatic hydrocarbon as a raw material on the basis of a selective carbon-carbon bond oxidative cleavage reaction. The method is carried out on the basis of the following steps: mixing an alkyl aromatic hydrocarbon as represented by general formula (I) with a photocatalyst, hydrobromic acid, and an organic solvent and enabling the mixture to react under the conditions of oxygen as an oxidant and light irradiation to simultaneously prepare a phenol compound as represented by general formula (II) and a ketone or aldehyde compound as represented by general formula (III). In the present invention, bulk alkyl aromatic hydrocarbons are used as raw materials for reaction to produce phenol, aldehyde, and ketone organic chemical raw materials. Compared with traditional synthesis methods, the present invention has many advantages such as inexpensive and readily available catalysts, mild reaction conditions, simple operation, good selectivity, and high safety, is suitable for large-scale synthesis of phenols, p-cresol, cyclohexanone, etc., and exhibits wide application prospects.

The invention belongs to the technical field of semiconductor materials, and particularly relates to a wax melting reagent and a wax melting method for an indium phosphide substrate and an indium phosphide epitaxial wafer. According to the wax melting reagent used in the wax melting method of the indium phosphide substrate provided by the invention, the fluorocarbon nonionic surfactant in the wax melting reagent is used for promoting the wax melting reagent to quickly spread and permeate into an organic wax layer and an indium phosphide interface; cyclohexanone is used for promoting the wax melting reagent to effectively permeate and swell an organic wax layer including various high-molecular polymers, so that the organic wax layer is relaxed and unwound, the polymer enhanced polishing wax is efficiently and thoroughly removed through the strong polarity of N-methyl pyrrolidone, the risk of metal ion pollution is reduced, and the service life of the polishing wax is prolonged. The effect of removing the pollution on the surface of the indium phosphide substrate is improved; and meanwhile, in the wax melting method, by setting the temperature in the steps of hot dipping stripping and warm dipping rinsing, the wax liquid is prevented from re-condensing on the surface of the substrate, and the effect of removing the surface pollution of the indium phosphide substrate is further improved.

The invention provides a preparation method of poly (p-dioxanone) with high viscosity and low monomer residual rate, and relates to the technical field of medical polymer materials, the preparation method of the poly (p-dioxanone) with high viscosity and low monomer residual rate comprises the following steps: taking a p-dioxanone monomer, adding an initiator and a catalyst, heating to 60-90 DEG C under the protection of argon, and reacting for 1-2 hours; reacting for 90 to 180 hours to obtain poly (p-dioxanone); and breaking the poly (p-dioxanone) into poly (p-dioxanone) particles with the particle size of less than 2mm, adding the poly (p-dioxanone) particles into a mixed solvent of hexafluoroisopropanol and ethanol, and carrying out heating reflux and vacuum drying to obtain the high-viscosity and low-monomer-residual-rate poly (p-dioxanone). The product poly (p-dioxanone) with high viscosity and low monomer residue is obtained, and the viscosity of the poly (p-dioxanone) is high gt; 2.5 dL / g, and monomer residue lt; and 0.2%.

The application discloses a method for preparing epsilon-caprolactone by catalyzing cyclohexanone with hydrogen peroxide by using a tin-zeolite composite catalyst. Zeolite is used as a catalyst carrier, and tin is applied to the acid-activated zeolite. The tin serves as an active component and forms a bimetallic active catalyst with Mg elements in the zeolite, promotes the reaction, and improves the conversion rate of cyclohexanone and the selectivity of epsilon-caprolactone. The catalyst is simple to prepare, cheap and easy to obtain, the reaction condition is mild, and the subsequent treatment is simple. The tin is applied to the zeolite to serve as a catalyst to participate in the reaction, the selectivity of the reaction is high, and the conversion rate is also high.

This invention relates to a phosphate-containing chiral diastereomeric oxime ester compound, its preparation method, and its applications, belonging to the field of organic synthesis technology. This invention introduces a chiral center at a specific location in the molecular structure of the oxime ester compound to form a mixture of diastereomeric stereoisomers. The introduction of the chiral center interferes with intermolecular chiral recognition, thereby effectively suppressing the π-π stacking effect and crystal growth between the aromatic ring cores. Furthermore, the introduction of the phosphate ester structure into the product effectively improves its solubility in propylene glycol methyl ether acetate or cyclohexanone solvents. The photocurable ink prepared using the diastereomeric oxime ester compound of this invention exhibits excellent storage stability and better photosensitivity.

The invention discloses a method for preparing high-energy-density fuel from ketone and phenol. The method comprises the following specific steps: step 1, under a solvent-free condition, ketone (cyclohexanone or 3, 3, 5-trimethyl cyclohexanone) and phenol are subjected to an alkylation reaction under the catalytic action of an acidic catalyst and a cocatalyst 3-mercaptopropionic acid to generate a bisphenol product; and 2, carrying out hydrodeoxygenation (HDO) reaction on the bisphenol product serving as a high-energy-density fuel precursor under the co-catalysis of Metal / C or nonmetal RaneyNi and a solid acid catalyst to obtain the high-energy-density fuel. According to the method, green renewable raw materials are taken as starting points, high-selectivity synthesis of the target product is realized through a few-step and easy-to-operate reaction path, and the method has both environmental protection property and high efficiency; the density of the prepared high-energy-density fuel is greater than 0.90 / cm < 3 >, the calorific value is greater than 40J / L, and the performance is comparable with that of a petroleum-based high-energy-density fuel.

The invention relates to the technical field of coatings, in particular to a manufacturing method and a using method of an electrical coating capable of reducing flashover. The invention relates to a manufacturing method of an electrical coating capable of reducing flashover. The electrical coating is prepared from the following materials in parts by mass: organic silicon resin, n-butyl alcohol, cyclohexanone, dimethyl carbonate, an acrylic emulsion, a stabilizer, a silicone acrylic emulsion, diisopropyl carbodiimide, acrylic ester, glycerol, citric acid, a dispersing agent, a coupling agent, ceramic powder and nano rubber powder. The electrical coating capable of reducing flashover can be obtained by mixing and stirring the materials in a reaction kettle. The application method of the flashover-reducing electrical coating obtained by the method comprises the step of brushing the surface of a brushed object under the condition that the temperature is kept at 50-70 DEG C. The anti-flashover device has the advantages of better anti-flashover effect and more durable durability.

The invention discloses a synthetic capsaicin microcapsule sustained-release seed coating agent as well as a preparation method and application thereof, and belongs to the technical field of agricultural chemistry. The preparation method of the synthetic capsaicin microcapsule sustained-release seed coating comprises the following steps: dissolving synthetic capsaicin in a cyclohexanone solvent, adding diisocyanate dicyclohexylmethane, and mixing to obtain an oil phase; adding OP-10 into the tea saponin extracting solution, and performing ultrasonic dissolution to obtain a water phase; adding the water phase into the oil phase, stirring and shearing; adding dibutyltin dilaurate into the sheared solution, and reacting in a dark place to obtain a synthesized capsaicin microcapsule; and adding an auxiliary agent acceptable to the seed coating agent into the synthesized capsaicin microcapsule to obtain the synthesized capsaicin microcapsule sustained-release seed coating agent. The synthesized capsaicin microcapsule slow-release seed coating agent has efficient bird repelling activity, environmental friendliness and slow-release characteristics, continuous repelling from the sowing stage to the seedling stage is achieved, and meanwhile the influence on non-target organisms is reduced.

The invention relates to a residual stress detection method of a polycarbonate component and a detection reagent thereof. The raw materials of the detection reagent comprise absolute ethyl alcohol, ethyl acetate, isopropanol, cyclohexanone and dimethyl sulfoxide. Ester bonds in a PC molecular chain can be permeated by sulfoxide groups of DMSO, so that hydrogen bonds are damaged and chain segments are loosened. Ethyl acetate and isopropanol can permeate into gaps of PC molecular chains, so that the volume expansion of the material is caused to induce microcracks. The carbonyl group of cyclohexanone can form strong interaction force with the carbonic ester group in the PC molecular chain; the polymer is small in molecular size and can rapidly permeate into gaps of PC molecular chains to damage hydrogen bonds and Van der Waals force among PC molecules, so that the molecular chains are dissociated. Therefore, the detection reagent can enable the high residual stress part of the polycarbonate component to rapidly generate obvious cracks.

The application belongs to the field of pesticide preparation, and particularly relates to a bactericidal composition containing bifenazate and application thereof; the bactericidal composition contains the following ingredients with the weight percentage: 3-10% of bifenazate, 5-20% of a triazole bactericide, 8-12% of Termul 5030, 1-3% of Atlox 4912, 1-5% of ethylene glycol, 13-18% of cyclohexanone, and deionized water to 100%. The triazole bactericide is tebuconazole or prothioconazole. The microemulsion prepared by the application has excellent preparation performance, and the emulsifier compound can not only form dense micelles to improve the solubilization amount, but also can reduce the emulsifier dosage, reduce the production cost, and has excellent control effect on wheat scab.

The invention discloses a high-activity double-bond naphthalene ring type halogen-free flame-retardant epoxy resin solution and a preparation method thereof. The high-activity double-bond naphthalene ring type halogen-free flame-retardant epoxy resin solution is characterized in that high-activity double-bond naphthalene ring type halogen-free flame-retardant epoxy resin in the solution has a chemical structure fragment shown in (I); the preparation method comprises the following steps: generating naphthalene ring type halogen-free flame-retardant epoxy resin from 1, 4-naphthoquinone, novolac epoxy resin, DOPO and cyclohexanone under the action of an ethyl triphenyl phosphine acetate catalyst, then adding acrylic acid, reacting under the action of a catalyst trimethyl benzyl ammonium chloride and the like, and then adding butanone, thereby obtaining the high-activity double-bond naphthalene ring type halogen-free flame-retardant epoxy resin solution. Furthermore, the invention also discloses a resin composition for a copper-clad plate, which is prepared by mixing a high-activity double-bond naphthalene ring type halogen-free flame-retardant epoxy resin solution, hydrocarbon resin, special bismaleimide resin, spherical silica powder, an initiator and toluene. The antenna is good in performance, and can meet the requirements of high-frequency and high-speed 5G transmitting base stations, artificial intelligence carrier plates and the like. (I)

The application belongs to the field of paint, and particularly discloses PU white primer, a preparation method and application thereof. The PU white primer comprises A component, B component and C component. The A component comprises hydroxyl acrylic acid resin, castor oil, dispersing agent, defoaming agent, cyclohexanone, silicon dioxide, titanium white powder, talcum powder, calcium carbonate, butyl acetate, leveling agent, organic tin and propylene glycol methyl ether acetate. The B component comprises butyl acetate, HDI trimer and isocyanate prepolymer. The C component comprises dimethylbenzene, butyl acetate, propylene glycol methyl ether acetate and dimethyl carbonate. The PU white primer has the advantages of water resistance, high temperature resistance, adhesion, adhesion, hiding power and strong flexibility, and has superior comprehensive performance, is green and safe, low in cost, and is very suitable for being used as wood and stone surface primer in kitchens, bathrooms and the like.

The invention provides a preparation method of a nickel phosphide catalyst applicable to preparation of adipic acid by electro-oxidation of cyclohexanone and an electrolysis device, and belongs to the technical field of new energy chemical engineering, and the preparation method specifically comprises the following steps: putting foamed nickel into a high-pressure reaction kettle containing a mixed solution of nickel nitrate, ammonium fluoride and urea, reacting at 100-120 DEG C for 8-12 hours, filtering, washing, and drying to obtain the nickel phosphide catalyst applicable to preparation of adipic acid by electro-oxidation of cyclohexanone. The obtained nickel hydroxide is placed at the downstream of a tubular furnace, the obtained sodium hypophosphite is placed at the upstream of the tubular furnace, heating is conducted for 2-4 hours at the temperature of 300-400 DEG C under the inert atmosphere, the nickel phosphide catalyst with high adipic acid selectivity in the cyclohexanone electrooxidation reaction is obtained, the nickel phosphide catalyst is especially suitable for large-current and long-time catalytic reaction, and the productivity and efficiency in unit time are greatly improved. Meanwhile, the problem that a high-performance catalyst is complex to prepare is solved, the synthesis condition is mild, the process is simple, the reproducibility is good, expensive raw materials or complex equipment is not needed, the production cost is remarkably reduced, and a solid foundation is laid for large-scale industrial application.

The application belongs to the technical field of chemical product production, and particularly relates to a catalyst composition and a method for preparing peroxy acid. The catalyst composition contains an acidic catalyst and a stabilizer, wherein the stabilizer is a nitrogen-containing alkaline compound with a lone pair of electrons on the N atom. The specific catalyst composition can be used to prepare peroxy acid, and the conversion rate of hydrogen peroxide is greater than 95%, the selectivity of the prepared peroxy acid is greater than 70%, and the final obtained peroxy acid product is used to prepare caprolactone, so that the conversion rate of cyclohexanone is greater than 95%, and the selectivity of the prepared caprolactone is greater than 95%.

The invention discloses a coating type catalytic electrode and a preparation method and application thereof.The preparation method comprises the steps that copper chloride dihydrate, cobalt nitrate, hexadecyl trimethyl ammonium bromide and foamy copper serve as raw materials, and three catalysts of CuOx, CoOx and CoOx / CuOx are firstly prepared through a hydrothermal method and an annealing calcination method; and preparing the catalyst into slurry, and coating the slurry on a foamy copper substrate subjected to acid treatment and roasting independently or uniformly mixed to obtain a coating type CoOx electrode, a CoOx / CuOx electrode and a CoOx + CuOx electrode. The coating type catalytic electrode is applied to a reaction for electro-catalytic synthesis of 6-aminocapronitrile, a three-electrode system is adopted, 0.1 M cyclohexanone and 500 ppm ammonium chloride are used as electrolyte, and the reaction is carried out within the RHE potential range of-0.6 V vs to-1.1 V vs. The preparation process is simple and easy to control, green and environment-friendly, the raw materials are cheap and rich in resources, the problems of high energy consumption, low selectivity and dependence on precious metal catalysts in the traditional 6-aminocapronitrile synthesis are effectively solved, and the industrial production requirements are met.

The application discloses a cyclohexanone monooxygenase mutant and application thereof in epsilon-caprolactone synthesis, and belongs to the technical field of bioengineering. The application discloses a cyclohexanone monooxygenase mutant, a nucleic acid for coding the cyclohexanone monooxygenase mutant, a recombinant expression vector containing the nucleic acid, a recombinant expression transformant containing the recombinant expression vector, and a recombinant cyclohexanone monooxygenase mutant catalyst. Compared with other catalysts for preparing epsilon-caprolactone, the cyclohexanone monooxygenase mutant provided by the application has the advantages of high catalytic activity and good thermal stability, and shows strong application potential and wide application prospect in industrial application.