121 results about "Cyclohexenes" patented technology

The invention relates to the field of pouring sealants, and discloses a modified epoxy resin pouring sealant and a preparation method thereof, the pouring sealant comprises epoxy resin, a modified inorganic filler, a modified additive and an auxiliary agent; the modified inorganic filler is prepared by grafting a quaternized s-triazine derivative and an inorganic filler; the quaternized s-triazine derivative is prepared through the steps that 3, 5-diaminophenylboronic acid, cyanuric chloride, 3-chloropropyltrimethoxysilane and 1, 4-butanediamine are sequentially subjected to substitution to prepare a s-triazine derivative, then the s-triazine derivative reacts with N, N-dimethyl-1, 3-diaminopropane, and bromoethane is used for quaternization treatment. The modified additive is prepared from a modified bismaleimide monomer prepared from maleic anhydride and 5 (6)-amino-1-(4-aminophenyl)-1, 3, 3-trimethylindane and 1-methyl-4-isopropyl cyclohexene through a self-stabilization precipitation polymerization method, the prepared pouring sealant is high in tensile strength, good in impact resistance and good in mechanical property, and the prepared pouring sealant has the advantages of being good in mechanical property, good in mechanical property and good in mechanical property. Meanwhile, good heat resistance, flame retardance, dielectricity and antibacterial activity are achieved.

The invention belongs to the technical field of chemical engineering, and relates to a method and a device for utilizing latent heat of a tower top gas phase in cyclohexanol preparation. Comprising a first separation tower, a second separation tower and the like, a tower top gas phase outlet of the second separation tower is connected with a hot side inlet of a second tower condenser, and a cold side outlet of the second tower condenser is connected with the first separation tower; a tower top gas phase outlet of the cyclohexene recovery tower is connected with the first separation tower; a tower top gas phase outlet of the cyclohexanol refining tower is connected with a hot side inlet of a refining tower condenser, and a cold side outlet of the refining tower condenser is connected with the second separation tower through a pipeline; an outlet of the hydration reaction system is connected with the first separation tower, and a tower kettle liquid phase outlet of the first separation tower is connected with an inlet of the second separation tower through a pipeline; a side line outlet of the first separation tower is connected with the hydration reaction system. The tower top gas phase latent heat of the second separation tower, the cyclohexene recovery tower and the cyclohexanol refining tower is recycled, so that the energy consumption in the cyclohexanol production process is reduced.

This invention relates to the field of organic synthesis technology and discloses a method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester, comprising the steps of: S1, providing raw material: 3-cyclohexenecarboxylic acid-3′-cyclohexene methyl ester; S2, epoxidation reaction: mixing the raw material with hydrogen peroxide, a composite catalyst, and a buffer to obtain a reaction solution containing the target product; S3, separation and purification: allowing the reaction solution to stand and separate into layers, separating the organic phase, washing with water, drying, and vacuum distilling to obtain 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester. This method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester uses hydrogen peroxide as the oxygen source, resulting in no heavy metal pollution, low wastewater volume, and conforming to the trend of green chemistry. The composite catalyst requires a small amount, has high activity and good selectivity, can be recycled ≥5 times, reducing costs, requiring less equipment, and is highly safe. The product is colorless and transparent, with a high epoxy value, purity ≥98.5%, low acid value, and good stability.

The invention discloses a preparation method of a catalyst for preparing cyclohexene through benzene hydrogenation, and belongs to the technical field of catalyst preparation. Comprising the following steps: dropwise adding a metal salt solution containing ruthenium salt and zinc salt and a precipitant solution into an alcohol solution at the same time, and carrying out a co-precipitation reaction; carrying out in-situ reduction on a solid product obtained by the coprecipitation reaction; a product obtained after in-situ reduction is put into alkali liquor to be stirred; according to the method, the alcoholic solution is used as a coprecipitation reaction medium, does not participate in the reaction, but can adjust the microenvironment of the reaction medium, so that the microenvironment fluctuation of the solution in the precipitation process is relatively small; the catalyst with relatively uniform precipitation can be obtained, so that the activity of the prepared Ru-Zn catalyst can be improved; the problems of single precipitation process, insufficient catalyst structure uniformity, poor preparation reproducibility and the like of a traditional water phase coprecipitation method are solved; the catalyst is applied to a reaction for generating cyclohexene through selective hydrogenation of benzene.

This invention relates to the field of adipic acid synthesis technology and discloses a method for producing adipic acid with low N2O tail gas emissions. The method includes: Step S1. A first contact reaction is carried out between cyclohexene, hydrogen peroxide, and a first catalyst, wherein the first catalyst is a solid catalyst comprising a tungsten-doped titanium-containing molecular sieve; the liquid phase material from the contact reaction is subjected to oil-water separation to obtain an aqueous phase containing cyclohexane oxide and an oil phase containing cyclohexene; Step S2. A second contact reaction is carried out between the aqueous phase containing cyclohexane oxide and nitric acid and a second catalyst, wherein the second catalyst is a Cu-containing... 2+ V 5+ and Mo 6+ The method utilizes ionic liquid catalysts. It results in low N2O emissions, high exhaust gas absorption rate, low production cost, and is environmentally friendly, showing promising prospects for industrial application.

The present application relates to the production field of organic chemical raw material cyclohexene, and discloses a production method of cyclohexene.The method comprises the following steps: carrying out cracking reaction on cyclohexylbenzene and / or dicyclohexylbenzene raw material and a solid acid catalyst to obtain cyclohexene and benzene; and the solid acid catalyst is selected from at least one of amorphous silicon aluminum, molecular sieve and solid supported inorganic acid.The method has the advantages of high raw material conversion rate, high cyclohexene yield and no by-product cyclohexane, etc.

This application discloses an electrolyte solute, its preparation method, and its application. The electrolyte solute comprises an olefinic cyclohexene carboxylic acid compound obtained by the reaction of conjugated diene carboxylic acids. The conjugated diene carboxylic acid includes at least one compound having the structure shown in Formula III: wherein X and Y are each independently selected from H, -RO-COOH, substituted or unsubstituted C1-10 saturated hydrocarbon groups, etc., and at least one of X and Y is -RO-COOH; RO represents a directly bonded or C1-10 saturated hydrocarbon group. The electrolyte solute of this application, comprising an olefinic cyclohexene carboxylic acid compound with unsaturated hydrocarbon functional groups, can both improve the flash voltage of the electrolyte and maintain low viscosity and high conductivity.

The application discloses a synthesis method of nanoscale sheet TS-1 titanium silicate molecular sieve. Tetraethyl orthosilicate is used as a silicon source, tetrabutyl titanate is used as a titanium source, tetrapropyl ammonium hydroxide is used as a template agent, and an ammonium salt is added as an assistant for limiting particle growth along a b axis. After hydrothermal reaction, the obtained product is washed, baked and calcined, so that the nanoscale sheet TS-1 titanium silicate molecular sieve with a b axis size of 20-50 nm and a axis and c axis size of 80-150 nm is synthesized. The method has the advantages of simple operation, repeatability, small template agent consumption, low cost, easy industrial production and application, etc. The sheet nanoscale TS-1 titanium silicate molecular sieve synthesized by the method has small particle size, thin b axis thickness, large specific surface area, more exposed Ti active sites, shortened transmission path of reactants and products, reduced diffusion resistance, and higher catalytic activity for oxidation reactions of toluene and cyclohexene.

The application provides a preparation method of a carbon material Ru-based catalyst and application of the carbon material Ru-based catalyst in partial hydrogenation of benzene to cyclohexene. According to the activity test results, the introduction of the carbon material improves the benzene conversion rate and appropriately increases the selectivity of cyclohexene. This is mainly due to the rich functional groups on the surface of the carbon material and the unique electronic effect, which increases the dispersion of the metal Ru and stabilizes the Ru δ+ In the reducing reaction system. The application selects a fixed bed as an evaluation device of the cyclohexene, avoids the problems such as difficult separation of products and catalysts in the traditional autoclave device, is beneficial to continuous production of the cyclohexene and provides certain convenience for subsequent industrial application.

The invention relates to a plant-source attractant for peach tree pests and application of the plant-source attractant. The plant-source attractant is selected from any one or more of beta-phellandrene, 3-methylene-6-(tert-amyl) cyclohexane-1-ene, 1-isopropyl-4-methylene cyclohexane, 4-methylene cyclohexane-1-ethyl formate, 4-oxoisophorone and 3-carene, and the plant-source attractant is selected from any one or more of beta-phellandrene, 3-methylene-6-(tert-amyl) cyclohexane-1-ene, 1-isopropyl-4-methylene cyclohexane, 4-methylene cyclohexane-1-ethyl formate, 4-oxoisophorone and 3-carene. The compound can be used for preparing a preparation for attracting peach tree pests outdoors. Compared with the prior art, the peach tree pest plant source attractant can trap and kill female adults in external environments such as a field, and the prevention and control effect is greatly improved.

The invention discloses a cyclohexene diketone lactic acid oxime ether compound as shown in a formula I, and a stereoisomer, a tautomer, a solvate or a pesticide acceptable salt thereof, and in the formula I, R1-R4 are defined in the specification. The compound as shown in the formula I contains a specific lactic acid or lactic acid derivative structural fragment, has very high herbicidal activity and safety, and has a good control effect on resistant weeds at the same time.

The invention belongs to the technical field of chemical engineering, and particularly relates to an energy-saving method and device for byproduct cyclohexane. Comprising the following steps: a, an extractive distillation process: performing primary extractive distillation on a material containing methyl cyclopentene, cyclohexane, cyclohexene and benzene to obtain an alkene solution at the top of the tower and an alkene solution at the bottom of the tower; performing secondary extractive distillation on the obtained alkane-alkene solution to obtain a crude cyclohexane solution at the tower top and an alkene solution at the tower bottom; performing tertiary extractive distillation on the obtained benzene-alkene solution to obtain a cyclohexene product at the tower top and a benzene solution containing benzene and a solvent at the tower bottom; b, a hydrofining process: carrying out hydrogenation reaction on the crude cyclohexane solution; and c, a rectification separation process: carrying out rectification on the hydrogenated cyclohexane solution in a low-pressure tower. According to the method, cyclohexane as a byproduct in the process of separating cyclohexene through three times of extractive distillation needs to consume a large amount of heat for refining, and the heat is recovered and used for extractive distillation, so that the energy consumption of the whole process can be reduced.

The invention discloses a preparation method and application of a tetragonal biconical titanium dioxide supported ruthenium catalyst, and the tetragonal biconical titanium dioxide supported ruthenium catalyst is obtained by preparing a tetragonal biconical anatase TiO2 carrier through combination of a hydrothermal method and calcination and then carrying out hydrothermal in-situ loading and reduction of a ruthenium compound solution by using glucose. The core advantage of the catalyst is the dual synergistic effect of the carrier and the electronic state: the tetragonal bipyramid structure endows the catalyst with high stability, and the deactivation of the catalyst can be greatly reduced; the electron transfer of Ru to the carrier weakens the adsorption energy of cyclohexene, a high-proportion special electronic state Ru beta / Ru alpha is obtained, the surface hydrophilicity is optimized, and the rapid desorption of the target product cyclohexene is promoted. In addition, the cost is reduced by utilizing biomass reduction, the high dispersity of Ru is realized, and under the Ru loading capacity of 10wt.%, when the benzene conversion rate of the catalyst reaches 48.67%, the cyclohexene selectivity reaches up to 82.25%, and the cyclohexene yield reaches 53.22%.

The application discloses a recycling method of by-product cyclohexene distillation still residue, and belongs to the technical field of recycling of by-product cyclohexene distillation still residue. The still residue is analyzed by liquid chromatography-mass spectrometry, and the chlorocyclohexane in the still residue is reacted with sodium disulfide under the condition of a catalyst. After static separation, the oil phase is refined to obtain dicyclohexyl disulfide and cyclohexene, and the water phase can be recycled. The catalyst is composed of sulfonated castor oil and a phase transfer catalyst, can improve the conversion rate of chlorocyclohexane and the selectivity of dicyclohexyl disulfide, and greatly shortens the reaction time. The application can realize recycling and utilization of the still residue, avoids waste of resources and pollution to the environment, saves the chemical production cost, and meets the environmental protection concept of green chemical industry.

The invention discloses a green and environment-friendly synthesis method for preparing a high-crystallinity mesoporous ZSM-5 molecular sieve and application thereof, and belongs to the technical field of catalysts and synthesis thereof. On the basis of a template-free synthesis scheme, a mother liquor waste liquid with a template is added as a seed crystal liquid to prepare a high-crystallinity ZSM-5 molecular sieve, and then the high-crystallinity mesoporous ZSM-5 molecular sieve is prepared through alkali treatment. The ZSM-5 molecular sieve prepared by the invention does not need to be roasted in the whole preparation process, is a green and environment-friendly synthesis route, and can effectively save the production cost and reduce the energy consumption. The molecular sieve has a rich pore structure and a larger specific surface area at the same time, oil and gas components can enter pores of the molecular sieve easily, the diffusion path is short, the mass transfer rate in the reaction process is higher, the generated product can be rapidly diffused out, and the conversion rate of the molecular sieve in the cyclohexene hydration reaction can be effectively improved.

The invention discloses a catalytic performance evaluation method and system for a cyclohexene hydration catalyst. The method comprises a catalyst drying step, a catalyst particle size analysis step, a catalyst pore volume, pore diameter and specific surface area analysis step and a catalyst catalytic effect test step. The system comprises an intermittent stirrer reaction kettle, a gas detection gas chromatograph, a laser particle size analyzer and a full-automatic specific surface area and aperture analyzer which are sequentially connected through a pipeline. According to the method, the catalytic performance of the cyclohexene hydration reaction catalyst of the cyclohexanol device is effectively evaluated, comparative analysis is carried out according to the evaluation effect, and the method can play a positive guiding role in production process optimization and adjustment for enterprises producing cyclohexanol products.

The invention provides an application of a V-type small molecule compound in adsorption separation of cyclohexene, cyclohexanol and cyclohexanone. The V-type small molecule compound forms a three-dimensional network structure with a cavity in a crystalline state due to the C-Hpi interaction among molecules, so that the small molecule compound has the same excellent properties as a traditional macrocyclic aromatic hydrocarbon main body; and under the condition of no induction, self-assembly can occur to form a non-covalent bond molecular pipeline for realizing adsorption separation of cyclohexene, cyclohexanol and cyclohexanone. The adsorption separation process is low in energy consumption, short in required time and low in equipment requirement, the selected crystalline material is easy to synthesize, high in yield and high in stability, and the adsorption separation effect on cyclohexene, cyclohexanol and cyclohexanone is good.

Disclosed in the present invention is an asymmetric catalytic hydrogenation method for a cyclohexene derivative, comprising the following steps: under a hydrogen atmosphere, the cyclohexene derivative undergoes an asymmetric hydrogenation reduction reaction in the presence of a catalyst, an acid and a solvent. The asymmetric catalytic hydrogenation method provided by the present invention achieves high conversion and excellent selectivity for a cyclohexene derivative substrate, and the resulting reduction product has a high ee value of up to 99%, and is suitable for industrial scale-up production. The method can effectively improve the production efficiency and product purity, thereby meeting the requirements of large-scale production.

The utility model relates to a cyclohexene hydration catalyst regeneration device which comprises a sealing box, a turntable is rotationally arranged in the sealing box, and a driving mechanism A for driving the turntable to rotate is arranged on the sealing box; a plurality of through holes which are uniformly arranged around the axis of the rotating disc are formed in the rotating disc, and membrane separators for placing catalysts are fixedly arranged in the through holes; the sealing box is provided with a plurality of penetrating holes located in the upper side and the lower side of the rotating disc and extending towards the rotating disc, sliding pipes penetrate through the penetrating holes in a sliding mode, and the sealing box is provided with a driving mechanism B for driving the sliding pipes to move in the axial direction of the penetrating holes. One end, facing the rotating disc, of each sliding pipe intersects with the motion trail of the membrane separator, and each corresponding sliding pipe is communicated with a material conveying pipe, a deionized water pipe and a nitric acid cleaning liquid pipe; the membrane separators are driven by the rotating disc to rotate and respectively pass through the conveying pipe, the deionized water pipe and the nitric acid cleaning liquid pipe, so that other membrane separators are regenerated while the cyclohexene catalytic reaction is carried out, and the efficiency and the safety of the cyclohexene catalytic reaction are improved.

This invention discloses a method for preparing cyclohexanol by photocatalytic hydration of cyclohexene: under inert gas protection, cyclohexene (Formula II) and water undergo a hydration reaction in an organic solvent, catalyzed by a photocatalyst and a co-catalyst, and irradiated by a light source, to obtain cyclohexanol (Formula I); the photocatalyst is an acridine salt compound (Formula III). This method is highly atom-economical, produces no byproducts, is environmentally friendly, and has broad industrial application prospects. The single-pass yield of cyclohexanol prepared by the photocatalytic hydration reaction of this invention can reach over 30%, which is significantly higher than the yield of existing technologies.

The invention discloses a method for separating benzene, cyclohexene and cyclohexane, which comprises the following steps of: selectively adsorbing a binary / ternary mixture of benzene, cyclohexene and cyclohexane by adopting a Q [7] powder material according to the sequence of preferentially adsorbing benzene, cyclohexene and cyclohexane; the binary / ternary mixture is adsorbed on the surface of the Q [7] powder material, so that the separation of benzene, cyclohexene and cyclohexane is realized, and the Q [7] powder material with the binary / ternary mixture adsorbed on the surface can be recycled. The separation process is simple to operate and low in equipment requirement; rectification operation is not needed in the separation process, energy consumption is low, energy is saved, and the production cost of benzene, cyclohexene and cyclohexane is reduced; the Q [7] powder material is high in stability and can be recycled, and the separation effect cannot be reduced.

The invention relates to a method for separating alpha-olefin and alkane by using a sequential simulated moving bed, which comprises the following steps of: conveying Fischer-Tropsch light oil into the sequential simulated moving bed, and separating in the sequential simulated moving bed by using a desorption agent; wherein the desorption agent is a mixed solution of cyclohexene and normal hexane, or a mixed solution of cyclohexene and cyclohexane. The method disclosed by the invention is suitable for separating long-chain alpha-olefin and alkane, and an alpha-olefin product with high purity and high yield can be obtained.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of cyclohexylmethyldimethoxysilane. The preparation method of cyclohexylmethyldimethoxysilane provided by the invention comprises the following steps: mixing cyclohexene, dichloromethylsilane and a platinum catalyst in a mixed atmosphere of oxygen and nitrogen, and then carrying out hydrosilylation reaction to obtain cyclohexylmethyldichlorosilane, the content of oxygen in the mixed atmosphere of oxygen and nitrogen is 100-200 ppm; and mixing the cyclohexylmethyl dichlorosilane and methanol, then carrying out a substitution reaction, and carrying out purification treatment on the system after the substitution reaction to obtain the cyclohexylmethyl dimethoxysilane. The cyclohexylmethyldimethoxysilane prepared by the preparation method provided by the invention has relatively high purity and yield.

The invention belongs to the technical field of petroleum resin preparation, and relates to a preparation method of hydrogenated petroleum resin based on D-A reaction toughening. Specifically, conjugated diene and a dienophile are subjected to a Diels-Alder reaction to generate a prepolymer monomer with a cyclohexene structure, cationic polymerization of the prepolymer is initiated under catalysis of a Lewis acid catalyst, a molecular chain is further increased, a D-A polymer with higher molecular weight and a specific branched structure is obtained, and deep hydrogenation is performed to obtain the high-molecular-weight and high-molecular-weight D-A polymer with a specific branched structure. The fully saturated hydrogenated petroleum resin with a rigid alicyclic structure and a flexible ester group side chain is obtained. The hydrogenated petroleum resin has good thermodynamic properties, mechanical properties and aging resistance which are synergistically optimized, meets the technical requirements of high polymer material additives, and has remarkable strategic development potential and market competitiveness in the field of refined, functionalized and green chemical materials.

The invention discloses a preparation method of 1-(1-piperidyl) cyclohexene. The preparation method of the 1-(1-piperidyl) cyclohexene comprises the following steps: dissolving cyclohexanone and piperidine in an organic solvent, adding a solid acid catalyst to carry out reflux reaction, separating and removing water generated in the reaction process; after the reaction is finished, filtering and separating to obtain solid which is the solid acid catalyst, and reserving filtrate for later use; adding inorganic acid into the filtrate, filtering and separating to obtain a filter cake and filtrate, and washing the filter cake to obtain piperidine salt; collecting the washing liquid and the filtrate, and carrying out rotary evaporation to obtain a crude product; and carrying out reduced pressure distillation on the crude product to obtain the 1-(1-piperidyl) cyclohexene. The solid acid catalyst is adopted, after the reaction is finished, the solid acid catalyst is recycled through filtration and directly applied mechanically, and the problem that a traditional catalyst cannot be recycled is solved; excessive piperidine is removed through an acid precipitation method, and the separation problem caused by approximate boiling points in a traditional process is avoided.

The invention relates to the technical field of petrochemical industry, and discloses application of a catalyst containing nickel and gallium in preparation of cyclohexene through selective hydrogenation of benzene and a method for preparing cyclohexene through selective hydrogenation of benzene. The catalyst containing nickel and gallium comprises a carrier and nickel and gallium loaded on the carrier, and nickel and gallium form an intermetallic compound. While the selectivity of cyclohexene is improved, the cost of the catalyst is reduced, and the problem of reactor corrosion is solved.

The application relates to the technical field of high polymer materials, and particularly discloses a high-density silicone rubber suitable for intelligent wearing and a preparation process thereof. The high-density silicone rubber suitable for intelligent wearing comprises the following components in mass fractions: 40-60 parts of silicone rubber; 40-48 parts of modified inorganic filler; 0.3-1.5 parts of a coupling agent; 0.1-5 parts of inorganic pigment; 1.6-2.3 parts of a vulcanizing agent; the modified inorganic filler is obtained by modifying a composite inorganic filler with a modifying liquid; the composite inorganic filler is a composite of titanium dioxide, zinc oxide, boron nitride and calcium carbonate whisker; and the modifying liquid is a composite of a solvent, octadecyl trimethyl ammonium chloride, cyclohexene oxide and linoleic acid. The application has the advantage that the high-density silicone rubber can better keep the color from changing.

The invention belongs to the field of biological enzyme catalysis, and provides a carboxylesterase CarEst3 mutant, the mutant is obtained by mutating phenylalanine at the 66th site of an amino acid sequence as shown in SEQ ID NO.2 into arginine, and the mutant can be used for catalyzing kinetic resolution of racemization 3-cyclohexene-1-methyl formate to prepare (S)-3-cyclohexene-1-formic acid. High stereoselectivity is achieved, and large-scale production can be achieved; the method for preparing (S)-3-cyclohexene-1-formic acid has the advantages of mild reaction conditions, high substrate concentration, good stereoselectivity, simple post-treatment, high product yield and the like.

The application provides a preparation method of (S)-3-cyclohexene-1-carboxylic acid and an intermediate, and relates to the technical field of chiral synthesis. (S)-3-cyclohexene-1-carboxylic acid IV is prepared by the following steps: propenal I is reacted with 1,3-butadiene II in a first solvent to generate (S)-3-cyclohexene-1-formaldehyde III under the promotion of an organic small molecule catalyst, and then (S)-3-cyclohexene-1-formaldehyde III is oxidized to generate (S)-3-cyclohexene-1-carboxylic acid IV. The method can efficiently and asymmetrically synthesize (S)-3-cyclohexene-1-formaldehyde under the action of the organic small molecule catalyst, and can realize efficient synthesis of (S)-3-cyclohexene-1-carboxylic acid, and the prepared (S)-3-cyclohexene-1-carboxylic acid has good yield and an ee value of up to 99.8%. The preparation method has mild and green reaction conditions, high reaction efficiency, high atom economy and step economy.

The present disclosure relates to a process for the isomerization of 2- alkyl-cyclohex-3-enyl aldehydes, esters, or ketones into mixtures comprising the corresponding 2-alkyl-cyclohex-2-enyl aldehydes, esters, or ketones using a suitable organometallic ruthenium complex as pre-catalyst. Mixtures comprising the corresponding 2-alkylene- cyclohexyl aldehydes, esters, or ketones may also be obtained.