104 results about "Cyclopentene" patented technology

The invention belongs to the technical field of novel material catalysis, and particularly relates to a hollow mesoporous silica supported phosphotungstic acid catalyst and a preparation method and application thereof. According to the invention, the advantages of high specific surface area and regional effect performance of hollow mesoporous silica and the characteristic of adjustable acidity of vacancy heteropolyacid quaternary ammonium salt are innovatively combined, and the cationic surfactant is loaded on the surface of the hollow mesoporous silica, so that the contact surface of raw materials is effectively increased, efficient conversion of reactants is assisted, and the reaction efficiency is improved. The supported catalyst with efficient catalysis and stable performance is obtained. The catalyst can be used for a reaction for preparing glutaraldehyde through heterogeneous catalysis of cyclopentene oxidation, and the reaction condition is mild. Experiments show that under the catalytic system, the cyclopentene conversion rate can reach 90% or above, the glutaraldehyde selectivity is improved to 75% or above, double improvement of the cyclopentene conversion rate and the glutaraldehyde selectivity is successfully achieved, meanwhile, the advantage that the catalyst is easy to separate is achieved, and an efficient solution is provided for industrial application of synthesis of glutaraldehyde through cyclopentene oxidation.

The invention discloses a preparation method and application of a catalyst with a high-valence tungsten coordination structure, and the preparation method of the catalyst comprises the following steps: enabling tungstic acid and hydrogen peroxide with specific concentration and proportion to react at a certain temperature to prepare a peroxy tungstic acid solution; dissolving a polydentate organic ligand capable of forming a stable chelation structure with a tungsten center in an organic solvent, mixing the obtained ligand solution with a peroxytungstic acid solution according to a specific ratio, and carrying out a coordination reaction at a certain temperature until the ligand is completely reacted; and finally, carrying out solid-liquid separation, washing and drying to obtain the high-valence tungsten coordination structure catalyst. The catalyst can be used for a reaction for synthesizing glutaraldehyde through cyclopentene oxidation, under the mild condition, hydrogen peroxide serves as a green oxidizing agent, the conversion rate of cyclopentene reaches 90% or above, the selectivity of glutaraldehyde exceeds 60%, the catalyst is stable in structure and can be recycled for 10 times or above, and the problems that in the prior art, a catalyst is difficult to separate, low in activity, poor in stability and the like are solved; the method has a remarkable industrial application value.

This invention provides a novel phosphine oxide compound that inhibits SHP2, a composition thereof, a method for preparing the compound, and a method for treating SHP2-related diseases (such as cancer).

A slow-reaction recyclable epoxy resin system for structural composites and a process of recycling the composites made therefrom are disclosed. The system includes an epoxy resin component including: a high purity epoxy resin selected from a high purity bisphenol A epoxy resin, a high purity bisphenol F epoxy resin, and combinations thereof, where the high purity epoxy resin is in a range of from 20 wt% to 95 wt% of the total weight of the cyclopentene resin component; a standard epoxy resin selected from a standard bisphenol A epoxy resin, a standard bisphenol F epoxy resin, and combinations thereof, where the standard epoxy resin is in the range of from 1 wt% to 50 wt% of the total weight of the epoxy resin component; and a curing agent component including a curing agent having at least one cleavage bond selected from a group including an acetal bond, a ketal bond, a formal bond, an orthoester bond, or a siloxy bond. The pot life of the slow-reaction recyclable epoxy resin system is greater than 540 minutes at 25 DEG C.

The application belongs to the technical field of fine chemical industry, and discloses a method for synthesizing cyclopentanol, which comprises the following steps: (1) taking cyclopentene and water as raw materials, adding a solubilizer, and mixing to obtain a reaction liquid; (2) continuously hydrating the reaction liquid in a fixed bed reactor filled with a cation exchange resin to obtain a reaction product; and (3) distilling and separating the reaction product to obtain cyclopentanol. The synthesis method has the advantages of simple process flow, environmental protection, low energy consumption, excellent product indexes, and long operation cycle of the catalyst. Polyethylene glycol-400 or polypropylene glycol-400 is used as a single solubilizer, and a specific macroporous strong acid cation exchange resin catalyst is used to realize the efficient and high-selectivity hydration reaction of cyclopentene.

The invention provides a production method of high-purity cyclopentene, and belongs to the technical field of olefin production. According to the method, a crude cyclopentene raw material rich in cyclopentene, cyclopentane and 1, 2-pentadiene is mixed with hydrogen, the mixture is introduced into an adiabatic bubbling bed reactor for a selective hydrogenation reaction, and a catalyst is modified Pd / Al2O3. After hydrogenation reaction liquid is subjected to light component removal and refining, a high-purity cyclopentene product with the content of 99.9% or above and the content of 1, 2-pentadiene being 10 ppm or below is obtained, and the monomer requirement for producing cyclopentene rubber is met.

The invention provides a compound type sweet and fragrant flavor composition and an application thereof, and the compound type sweet and fragrant flavor composition comprises maltol, ethyl maltol, methyl cyclopentenolone, ethyl cyclopentenolone, 3, 4-dimethyl-1, 2-cyclopentanedione, 4-hydroxy-2, 5-dimethyl-3 (2H) furanone and 3, 5-dimethyl-1, 2-cyclopentanedione, and the compound type sweet and fragrant flavor composition comprises maltol, ethyl maltol, methyl cyclopentenolone, ethyl cyclopentenolone, 3, 4-dimethyl-1, 2-cyclopentanedione, 4-hydroxy-2, 5-dimethyl-3 (2H) furanone and 3, 5-dimethyl-1, 2-cyclopentanedione. The composition disclosed by the invention has obvious sweet aroma style characteristics and aroma intensity, can effectively increase the sweet aroma flavor and sensory style characteristics of cigarettes, makes up for the defects of light cigarette aroma, insufficient smoke concentration and the like of low-coke cigarettes, can restore the natural feeling of the cigarette aroma, ensures good harmony, and has good application prospects. The method has a wide application prospect in the field of tobacco flavor blending, especially in the aspect of low-coke cigarette flavor enhancement compensation.

This invention relates to cyanoacrylate-containing compositions that include, in addition to the cyanoacrylate component, a benzodioxol free radical stabilizer. The inventive cyanoacrylate compositions demonstrate improved shelf life stability while maintaining the level of adhesive performance.

The invention discloses a preparation method of 1-amino-2-cyano-1-cyclopentene, which comprises the following steps: 1, preparing a mixed solution, namely mixing a first organic solvent with super alkali in a protective gas atmosphere, heating by adopting a nano infrared energy-saving electric heating coil, stirring, uniformly mixing and dissolving to obtain the mixed solution; the super base is selected from one of potassium tert-butoxide, sodium tert-butoxide, sodium ethoxide, sodium methoxide and sodium hydroxide; 2, cyclization reaction: dropwise adding adiponitrile into the mixed solution, and continuously carrying out infrared heat preservation reaction for 3-8 hours to obtain a reaction solution of 1-amino-2-cyano-1-cyclopentene; 3, cooling crystallization and filtration: cooling the reaction liquid to-10-5 DEG C, standing for crystallization, and carrying out pressure filtration in a protective gas atmosphere to obtain an ACCP crude product and a filtrate; and 4, recrystallizing and refining to obtain a pure product. The method is mild in reaction condition, low in energy consumption, good in product yield and high in product purity, solves the problems of high solvent toxicity, low yield and high environmental protection pressure in the prior art, and is suitable for production of medicine and pesticide intermediates.

The invention relates to the technical field of fine chemical engineering, in particular to a method for preparing cyclopentanol based on one-step synthesis of cyclopentene, which comprises the following steps: step 1) preparation of a modified strongly acidic cation exchange resin catalyst; (2) synthesizing by a one-step method; step 3) separation; and 4) purifying. In the step (2), under the inert atmosphere, the modified strong-acid cation exchange resin catalyst, cyclopentene, n-amyl alcohol and water are mixed and react; wherein the molar ratio of the cyclopentene to the water is (3-5): 1, the addition amount of the n-amyl alcohol is 1.0-2.0 times of the mass of the cyclopentene, and the n-amyl alcohol and the water form a cosolvent system. The method has the advantages that the process route is clean, efficient and pollution-free, the conversion per pass is high, the product is easy to separate, the low-temperature physical property of the product is good, the solvent and reactants in the whole reaction process can be repeatedly used, efficient and environment-friendly hydration preparation of cyclopentanol from cyclopentene can be realized, and the method has a good industrial application prospect.

The invention discloses a preparation method of high-purity cyclopentene, and belongs to the technical field of organic synthesis. The method comprises the following steps: firstly, depolymerizing dicyclopentadiene into cyclopentadiene; mixing the obtained gaseous cyclopentadiene with hydrogen according to a ratio, sequentially passing through a first-stage fixed bed reactor and a second-stage fixed bed reactor which are connected in series, and carrying out selective hydrogenation reaction under the action of a supported palladium catalyst to generate crude cyclopentene; and finally, carrying out dimerization reaction on the crude cyclopentene in an inert atmosphere to remove residual cyclopentadiene, carrying out normal-pressure distillation purification, and collecting fractions at 43-47 DEG C to obtain high-purity cyclopentene. The two-stage fixed bed continuous hydrogenation process is adopted, the operation is simple, the reaction condition is mild, the cyclopentadiene conversion rate is high, the cyclopentene selectivity is good, the product purity can reach 99.6% or above, and the method is suitable for industrial continuous production.

The application discloses a 2-aryl-3-trifluoroethyl indole compound with a structure as shown in formula A and a preparation method and application thereof. 3 The target object A is obtained through the reaction of the aromatic aldehyde, the azacyclic carbene (NHC) and the o-amino styrene, 3,3-dimethyl-1-(trifluoromethyl)-1,3-dihydro-1 lambda The 2-aryl-3-trifluoroethyl indole compound disclosed by the application has excellent antibacterial activity, is a novel material with a novel structure, raw materials are easy to obtain, reaction conditions are mild, green and environment-friendly, and operation is simple.

This invention relates to the field of building materials technology, and particularly to a viscosity-reducing polycarboxylate superplasticizer and its preparation method. The viscosity-reducing polycarboxylate superplasticizer uses polyethylene glycol dicyclopentenyl ether methacrylate as the macromonomer, combined with 2-methacryloyloxyethyl phosphocholine, 4-vinylphenylboronic acid, and polyethylene glycol phenyl ether methacrylate as small monomers, prepared via free radical polymerization. Finally, it undergoes freeze-drying and grinding to obtain the target powder product. When the prepared superplasticizer is added to concrete mixtures, it swells and unfolds into a comb-shaped polymer under mechanical stirring and alkaline conditions. Through PEG long side-chain lubrication and steric hindrance, the regulation of surface tension / interfacial energy by phosphocholine groups, and the selective adsorption of borate groups, the initial viscosity is significantly reduced, the viscosity increase over time is controlled, and segregation and bleeding are effectively suppressed, making it suitable for various cementitious systems.

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 application discloses a maleimide-based self-initiating two-photon photoresist and a patterning method thereof. The maleimide-based self-initiating two-photon photoresist contains 100 parts of a maleimide compound, 10-30 parts of a polycyclopentenyl acrylate and 20-50 parts of a high-refractive fluorene-based active crosslinking agent. The maleimide-based self-initiating two-photon photoresist avoids the use of conventional two-photon initiators, thereby avoiding the migration and penetration of the residual photo-initiator and photolysis fragments in the common photoresist and the possibility of further photochemical reactions; the oxygen-blocking effect of the polycyclopentenyl acrylate can ensure the normal use of the photoresist in air; and the high-refractive fluorene-based active crosslinking agent can effectively adjust the refractive index of the photoresist to improve the writing effect. After the photoresist is written by a femtosecond laser and developed, two-dimensional lines with a feature size of hundreds of nanometers can be obtained, and three-dimensional structures with a size of hundreds of micrometers can also be written.

The invention provides a production method of C5 monoolefine, and belongs to the technical field of olefin production. According to the invention, rectification pretreatment is carried out on an m-pentadiene raw material, then two-stage hydrogenation control is adopted, and the per-pass conversion rate of the m-pentadiene is strictly controlled in the first-stage hydrogenation process, so that the yield of the 1-pentene is remarkably improved, and the purity reaches 99.9% or above; carrying out second-stage hydrogenation on the C5 fraction which is subjected to the first-stage hydrogenation and from which 1-pentene is separated, so that unconverted m-pentadiene in the raw material is converted into monoolefine, and controlling the conversion rate gt of the second-stage hydrogenation; and rectifying to obtain a 2-pentene product and a cyclopentene product.

The invention relates to chilli sauce flavor essence as well as a preparation method and application thereof. The essence is prepared from the following raw material components: acetic acid, dimethyl disulfide, ethyl lactate, diallyl disulfide, diallyl trisulfide, allyl methyl disulfide, dimethyl trisulfide, 2-methylbutyric acid, alpha-terpilenol, phenethyl alcohol, phenylpropanol, ethyl caprate, fenugreek lactone, 2-methyl-2-pentenoic acid, linalool, hexanal, eugenol and ethyl caprylate. The chilli sauce is prepared from ethyl maltol, methyl cyclopentenolone, capsicum oleoresin, a chilli sauce Maillard reactant and caprylic capric triglyceride. The chilli sauce flavor essence prepared by the invention not only has the flavor characteristic of chilli sauce, but also has the taste of chilli sauce, and is full and pure in fragrance, high in simulation degree and stable in quality.

The invention provides a process for producing cyclopentanone from cyclopentene, and belongs to the technical field of cyclopentanone production.In the esterification reaction, acetic acid is used for removing metal ions to improve the activity stability of a sulfonic cation exchange resin catalyst; when the ester hydrogenation process is used, the cyclopentyl acetate is directly converted into cyclopentanol and absolute ethyl alcohol with high added value; the appropriate CuO-ZnO / Al2O3 high-activity dehydrogenation catalyst is selected, so that the reaction efficiency is obviously improved, the energy consumption is obviously reduced, the conversion per pass of the dehydrogenation reaction is 70% or above, and the selectivity of cyclopentanone is close to 100%. In short, the production method provided by the invention is high in catalyst activity, high in reaction conversion rate, short in reaction time, relatively easy in product refining and cyclopentanol recovery, obviously reduced in energy consumption and more suitable for industrial production.

The invention discloses a method for synthesizing selenocyclopentene by electrochemical catalysis of cyclization reaction of terminal alkyne, acrylate and diselenide [3 + 2], and belongs to the technical field of organic synthesis.The method comprises the steps that the terminal alkyne, allyl dimethyl ester and diselenide serve as raw materials, cheap ferrocene serves as a redox catalyst under the electrochemical condition, and the selenocyclopentene is synthesized through the cyclization reaction of the terminal alkyne, the acrylate and the diselenide [3 + 2]; the selenium-containing cyclopentene skeleton is efficiently constructed. According to the method for synthesizing selenocyclopentene through the cyclization reaction of terminal alkyne, acrylate and diselenide [3 + 2] through electrochemical catalysis, the reaction condition is mild, no additional oxidizing agent is needed, the substrate applicability is wide, the functional group compatibility is good, and the target product can be obtained with the medium to excellent yield.

The invention relates to the field of adhesives, and discloses an anti-yellowing three-proofing adhesive for an outdoor display screen and a preparation method of the anti-yellowing three-proofing adhesive. The invention relates to an anti-yellowing three-proofing adhesive for an outdoor display screen. The anti-yellowing three-proofing adhesive is prepared from the following raw materials in parts by weight: 62-72 parts of an acrylate prepolymer, 15-25 parts of an active diluting monomer, 2.5-4.5 parts of a photoinitiator, 0.2-0.4 part of an antioxidant and 0.1-0.3 part of a flatting agent, the acrylate prepolymer is prepared from pentaerythritol triacrylate, ethylene glycol dicyclopentenyl ether methacrylate, dimethylamino ethyl acrylate, o-phenyl phenoxyethyl acrylate, a catalyst and a polymerization inhibitor. The three-proofing adhesive prepared by the invention has relatively good bonding strength, cohesion and yellowing resistance, is not easy to soften and creep when being used in ultraviolet and thermal environments for a long time, is not easy to cause the problem of displacement of a display screen, and has relatively good supporting property on the display screen.

The invention provides a cyclopentene chromene-cinnamate compound as well as a preparation method and application thereof, and belongs to the technical field of organic synthesis. According to the invention, mangiferin is taken as a guide, and a cyclopentenochromene structure is designed and synthesized from cyclopentenopyrane and a chromene skeleton by using molecular hybridization and skeleton transition strategies. According to the cyclopentenochromene-cinnamate derivative containing the cinnamic acid active fragment, the cinnamic acid fragment with pesticide activity is grafted to the 8-site of cyclopentenochromene, the cyclopentenochromene-cinnamate derivative containing the cinnamic acid active fragment is synthesized, and the obtained compound has good insecticidal activity, bactericidal activity and plant virus resisting activity.

This invention provides a resin material with low relative permittivity, low dielectric loss tangent, high thermal conductivity, and high heat resistance. A multifunctional vinyl resin is represented by the following general formula (1). Here, R... 1 R represents a hydrocarbon group with 1 to 8 carbon atoms independently. 2 Independently represents a hydrogen atom or a dicyclopentenyl group, with at least one being a dicyclopentenyl group. X independently represents a hydrogen atom or a vinyl-containing aromatic group represented by formula (1a) below, with at least one being a vinyl-containing aromatic group. n represents the number of repetitions, with an average value of 1 to 5. Ar represents an aromatic ring. -CH2-Ar-CH=CH2(1a).

The present application relates to a kind of trans polycyclopentene rubber, it is characterized in that, the trans structure content is 70%~95%, number average molecular weight is 30000~1200000, molecular weight distribution is 1.2~3.5, gel content is less than 3.0% mass.The present application also discloses a kind of trans polycyclopentene rubber continuous solution polymerization method.The implementation of the present application not only can realize the continuous production of trans polycyclopentene rubber, but also can realize the efficient, sufficient mixing of various materials in reaction process, greatly improve catalyst activity, polymerization conversion rate and reaction efficiency, and the structure of polymer is stably controlled.

The invention discloses a rectifying tower for producing high-purity cyclopentene, which comprises a tower body, a plurality of tower plates are arranged in the tower body, a plurality of groups of through holes are formed in the circumference of the top surface of each tower plate at equal intervals, and a hollow rotating shaft is rotatably connected in the tower body. The temperature of the tower plate is stabilized at 35-40 DEG C, cyclopentene polymerization caused by the temperature exceeding 45 DEG C is avoided, polymer generation is reduced, nitrogen is blown away from top impurities through a hollow rotating shaft, a back-flushing cleaning mechanism, a nitrogen conveying pipe and the like, shutdown cleaning is not needed, a dredging mechanism and a rotating mechanism are arranged, and a second motor drives the hollow rotating shaft to intermittently rotate, so that the cleaning efficiency is improved. The first motor drives the cam to enable the dredging rod to be inserted and pulled in a reciprocating mode, stubborn impurities are removed, up-and-down cooperative anti-blocking is formed, a rotary connector is arranged, it is ensured that no air permeates in nitrogen conveying, oxygen is isolated, impurities are prevented from being introduced when a machine is disassembled, and product purity and production stability are guaranteed.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing 3-methyl-2-cyclopenten-l- one based Fl-bridge groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing 3-methyl-2- cyclopenten-l-one based ll-bridge groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing 3-methyl-2-cyclopenten-l-one based H- bridge groups (e.g., methods of drying and / or poling, and the like), (3) uses of NLO chromophores containing 3-methyl-2-cyclopenten-l-one based ll-bridge groups in electro-optic devices (e.g., EOMs). The nonlinear optical (NLO) chromophores have the following formula (II), wherein X is a cyclopenten-based Π-bridge having formula Π1 or Π2.

This invention discloses a trans-polycyclopentene polymerization catalyst system, comprising a main catalyst, cyclopentene, and an oxygen- or halogen-containing activator. This system is an aged system. The invention also discloses polymerization reactions using this catalytic system. In the catalyst preparation process, the aging of the main catalyst and activator, especially the addition of a small amount of the polymerization monomer cyclopentene during aging, significantly improves the catalyst activity and stability. After aging, the catalyst does not deactivate even after long-term storage at room temperature. Simultaneously, it greatly enhances the catalyst's tolerance to impurities in the polymerization monomer. Furthermore, the monomer added during catalyst preparation can also participate in the polymerization reaction, effectively increasing the monomer concentration in the system, which in turn increases the polymerization conversion rate.

The invention discloses an application of 4-methylsulfonyl-1-cyclopentene in preparation of an electrolyte, and belongs to the technical field of supercapacitor preparation. Experiments find that 4-methylsulfonyl-1-cyclopentene can be subjected to a reduction-oxidation reaction on the surface of an electrode prior to a basic solvent in the electrolyte, and participates in formation of a more compact and stable solid electrolyte interface (SEI) membrane through reduction decomposition on the surface of a negative electrode, so that continuous decomposition of the electrolyte is effectively inhibited, side reactions are reduced, and the service life of the electrolyte is prolonged. Therefore, the electrode interface is stabilized and the interface impedance is reduced. Therefore, the 4-methylsulfonyl-1-cyclopentene can solve the technical problem of circulating diving caused by too fast increase of direct current resistance, and has the potential of serving as an electrolyte additive and preparing a super capacitor with excellent performance.