20 results about "Cyclopentane" patented technology

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 utility model provides a crude cyclohexane refining recovery system which comprises a cyclohexane refining reactor and a cyclohexane rectifying tower, the bottom of the cyclohexane refining reactor is connected with the cyclohexane rectifying tower through a pipeline, and the top of the cyclohexane rectifying tower is connected with a first return tank through a first circulating water condenser and a cyclohexanol rectifying tower reboiler respectively. The first reflux tank is connected with the methylcyclopentane separating tower through a pipeline, the bottom of the methylcyclopentane separating tower is connected with the methylcyclopentane rectifying tower through a pipeline, and the bottom of the methylcyclopentane rectifying tower is connected with the cyclohexane rectifying tower through a pipeline. The device disclosed by the utility model is ingenious in design, can greatly improve the utilization efficiency of cyclohexane, and has good economic benefits.

This invention discloses a three-component oxidation system and its application in the degradation of 4-hydroxyestradiol. Specifically, it discloses a 4,5-exogeneic dioxygenase, HedG1, associated with the oxidative cleavage of 4-OH-E1. This enzyme, supported by an electron transport chain composed of ferrugin HedG2 and ferrugin reductase HedG3, catalyzes the 4,5-seco meta-oxidative cleavage of 4-OH-E1, generating a meta-cleavage product of the A ring. The three-component dioxygenase system HedG1G2G3 based on HedG1 in this invention rapidly reduces the hormonal activity of cyclopentane polyhydrophenanthrene by disrupting the A ring of the cyclopentane polyhydrophenanthrene structure, which is beneficial for the remediation and treatment of environmental estrogen pollution.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The application relates to the technical field of materials, and discloses an electronic component carrier sheet and a preparation method thereof. The carrier sheet is prepared by mixing polyethylene terephthalate as a base material, elastomers, a compatilizer and modified inorganic additives as auxiliary materials, and a double-layer co-extrusion process, wherein the modified inorganic additives are prepared by forming hyperbranched siloxane macromolecules with a block structure of cyclopentane heterocycle-siloxane on the surface of halloysite nanotubes, the existence of the hyperbranched siloxane macromolecules can improve the compatibility of the halloysite nanotubes and the PET base material, and form a network structure with the halloysite nanotubes as the core, thereby realizing the reinforcement and modification of the sheet. Meanwhile, the siloxane structure and rigid cyclopentane heterocycle structure of the hyperbranched siloxane macromolecules have strong hydrophobicity, can form a super-hydrophobic layer on the surface of the PET, and can effectively prevent the moisture absorption phenomenon caused by high humidity.

The invention relates to stoichiometric salts of tetracarboxylic acids and diamines of the general formula (I) wherein R1 is selected from the group consisting of tetravalent residues of butane, cyclobutane, cyclopentane, cyclohexane, tetrahydrofuran and benzophenone and R2 is selected from the group consisting of divalent residues of unbranched, branched or cyclic aliphatic hydrocarbons having 3 to 15 carbon atoms, with the proviso that the salts of the formula (I) are water-soluble and are selected from the group consisting of compounds (1) to (28); and to polyimides prepared from these salts by polycondensation.

The invention relates to the technical field of foaming compositions, and particularly discloses a low-thermal-conductivity foaming composition for a low-density quick release system and a preparation method of the low-thermal-conductivity foaming composition. The invention relates to a low-thermal-conductivity foaming composition for a low-density quick-release system. The low-thermal-conductivity foaming composition is prepared from the following raw materials in parts by weight: 13-14 parts of cyclopentane, 130-140 parts of polymethylene polyphenyl isocyanate, 50-60 parts of polycarbonate diol, 25-30 parts of o-xylene ammonium ether, 1.6-1.8 parts of deionized water, 3-4 parts of an emulsifier and 7-10 parts of modified composite fibers. The low-thermal-conductivity foaming composition for the low-density and quick-release system has the advantages of high foam closed cell rate and low thermal conductivity coefficient.

The invention provides a full-biodegradable ramie modified material and a preparation method thereof, and belongs to the technical field of full-biodegradable materials. The ramie modified material comprises the following raw materials: ramie powder, poly (butylene adipate-co-terephthalate), polylactic acid, a coupling agent, absolute ethyl alcohol and cyclopentyl oil. The preparation method comprises the following steps: mixing the ramie powder and the coupling agent, performing primary mixing in a stirring state, then adding the polylactic acid and the poly (adipic acid) / butylene terephthalate, performing secondary mixing, finally adding the absolute ethyl alcohol and the cyclopentyl oil, and performing tertiary mixing to obtain a mixture; and carrying out extrusion and injection molding on the mixture to obtain the ramie modified material. According to the invention, cellulose molecules in ramie can perfectly realize two-phase interface blending and eutectic melting with matrix resin, high-mass-fraction filling of cellulose can be realized, the performance of the ramie modified material is stable, and the requirements of different application scenes are met.

The invention belongs to the technical field of medicines, and particularly relates to application of a ciclopirox compound in a medicine for treating cancers induced by KRAS G12D mutation, and the cancers comprise pancreatic ductal adenocarcinoma and colorectal cancer. The compound can obviously inhibit the activity of KRAS mutant pancreatic cancer cells, has weak inhibition on KRAS wild type cells, and shows potential targeted therapy advantages. Animal experiment results show that the ciclopirox compound provided by the invention can effectively inhibit tumor growth and down-regulate phosphorylated STK31 protein expression. The composition is clear in component and simple and convenient to prepare, and provides a new strategy for overcoming the drug resistance of pancreatic cancer.

The invention discloses an electrolyte for a high-specific-energy lithium metal battery and the lithium metal battery, and belongs to the technical field of secondary batteries. The invention relates to an electrolyte for a high-specific-energy lithium metal battery. The electrolyte comprises a lithium salt, a solvent and an additive, the solvent comprises fluorinated cyclic carbonate and sulfones; the fluoro cyclic carbonate is prepared from at least one of fluoro ethylene carbonate, propylene trifluorocarbonate and difluoro ethylene carbonate; the sulfones comprise at least one of dimethyl sulfone, methyl ethyl sulfone, sulfolane, trifluoromethyl ethyl sulfone, trifluoropropyl methyl sulfone and methoxy methyl fluorosulfone. According to the electrolyte for the high-specific-energy lithium metal battery disclosed by the invention, the fluoro cyclic carbonate is matched with the sulfone solvent to form a main solvent system with high oxidation resistance, so that the high-pressure decomposition of the electrolyte and the side reaction on the surface of lithium metal are reduced, and the growth of lithium dendrites is inhibited, thereby realizing stable circulation of the high-specific-energy lithium metal battery.

The present invention discloses a method for preparing high-optical-purity trans-2-aminocyclopentanol. The method mainly comprises the following steps: first, ring-opening cyclopentane in ammonia water to obtain a trans-2-aminocyclopentanol racemate; second, using optically pure N-Boc-proline as a resolving agent, resolving the racemic trans-2-aminocyclopentanol in an alcohol solvent to obtain (1R, 2R)-2-aminocyclopentanol resolvate or (1S, 2S)-2-aminocyclopentanol resolvate, and then hydrolyzing the mixture with alkaline solution to obtain optically pure trans-2-aminocyclopentanol. The preparation method has readily available raw materials, a short process, a high yield, and is suitable for process-based production.

Alcohol based unleaded automotive racing fuels, using blends of four basic chemical components, including ethanol, methanol, toluene, and isopentane and / or cyclopentane. Mixtures provide increased power, and better charge cooling than conventional racing gasolines, whether leaded or unleaded. The claimed racing fuel blends do not include gasoline, isooctane, or alkylate fractions common to alcohol-gasoline mixtures such as E85 alcohol based fuels. The novel fuel blends claimed can be manufactured from commonly available pure chemical components, and make possible distributed manufacture of automotive racing fuels.

The invention provides a preparation method of p-tert-butylphenyl sulfide cyclopentane trifluorosulfonate, and belongs to the technical field of photoacid synthesis. Comprising the following steps: S1, adding 5-bromo-1-pentanol, triethylamine and a first solvent into a reaction container, uniformly stirring, then adding p-tert-butylthiophenol, fully reacting, and spin-drying the solvent to obtain a compound 1; and S2, directly adding a second solvent and triethylamine into the compound 1, fully stirring, adding trifluoromethanesulfonic anhydride at room temperature, fully reacting, and performing post-treatment to obtain a white powdery compound 2, namely p-tert-butylphenyl vulcanized cyclopentane trifluorosulfonate. According to the invention, 5-bromo-1-pentanol and p-tert-butylthiophenol are used as reaction raw materials, a compound 1 is obtained under base catalysis, and then esterification and ring closing are carried out to obtain a target product. The synthesis method provided by the invention is simple to operate, high in reaction yield and high in product purity (the yield is greater than or equal to 80%, and the HPLC purity is gt; 99.1%).

The invention discloses an insulator insulating material and a preparation method of the insulator insulating material. Raw materials of the epoxy resin composition comprise the following components in percentage by weight: 10%-15% of bisphenol A epoxy resin, 15%-20% of alicyclic epoxide, 18%-25% of a first anhydride curing agent, 10%-15% of a second anhydride curing agent, 1%-5% of a flexibilizer polyethylene glycol diglycidyl ether, 1%-5% of a diluent, 20%-40% of a filler, 1%-13% of an accelerant, 0.5%-5% of a flame retardant and 0.36%-0.36% of a flame retardant. 2% of a defoaming agent; wherein the alicyclic epoxide is prepared from one or more than two of hydrogenated bisphenol A epoxy resin, alpha-dicyclopentyl dioxide ether and beta-dicyclopentyl dioxide ether; the first anhydride curing agent comprises trimellitic anhydride glyceride and / or cyclopentadianhydride; the second anhydride curing agent comprises polysebacic anhydride. The ultraviolet aging resistance of the epoxy resin can be improved.

The application discloses a kind of herbicidal composition and its application, the composition includes active ingredient A and active ingredient B, wherein active ingredient A is formula (I) compound, active ingredient B is selected from one or more of oxadiazon, propynyl oxadiazon, cyclopentane oxadiazon.The mass ratio of active ingredient A and active ingredient B of the composition is 1:60-20:1.The component of the application is reasonable, and the effect of weeding in rice field is good, and its activity and weeding effect are not the simple superposition of each component, compared with the existing single preparation, with the characteristics of weeding effect, low drug dosage, broad herbicidal spectrum, good crop safety.

The invention discloses a preparation method of an antiviral drug amonevir. The method comprises the following steps: pumping sulfurized cyclopentane-4-formyl chloride prepared in situ and 2, 6-dimethylaniline into a first microchannel reactor, and carrying out an amidation reaction; pumping the obtained amide intermediate, potassium tert-butoxide and bromoacetic acid into a second microchannel reactor, and carrying out a second amidation reaction; pumping the generated product, 4-(1, 2, 4-oxadiazole-3-yl) aniline and a condensing agent into a third microchannel reactor, and carrying out a third amidation reaction; pumping the obtained product and hydrogen peroxide into a fourth micro-channel reactor for oxidation reaction to obtain an amonevir crude product; and after the crude product is subjected to extraction, concentration and ethanol recrystallization, an amonevir product with liquid phase purity of 99.9% is obtained. And the tautomer of the amonevir can be simply and efficiently separated by utilizing the detection method disclosed by the invention, and a reliable guarantee is provided for industrial production of the amonevir.

The invention provides a preparation method and application of low-crystallization-velocity polypropylene random copolymer based on in-situ synthesis modification, and the preparation method comprises the following steps: pre-polymerizing propylene and a vinyl compound to obtain a pre-polymer; the vinyl compound is selected from at least one of vinyl cyclopentane, vinyl-2-methyl cyclohexane, 3-methyl-1-butene, 3-ethyl-1-hexene, 3-methyl-1-pentene and styrene, and the vinyl compound is selected from at least one of vinyl cyclopentane, vinyl-2-methyl cyclohexane, 3-methyl-1-butene, 3-ethyl-1-hexene, 3-methyl-1-pentene and styrene; carrying out polymerization reaction on the prepolymer, propylene, ethylene and hydrogen to obtain ethylene-propylene random copolymer polypropylene resin powder; uniformly mixing the ethylene-propylene random copolymer polypropylene resin powder, the antioxidant, the halogen absorbing agent, the antistatic agent and the nucleating agent; and extruding the obtained mixture to obtain the polypropylene random copolymer with low crystallization speed. According to the invention, the vinyl compound is introduced in the pre-polymerization stage, so that the polypropylene random copolymer has lower isotacticity and slowed down crystallization speed, and the crystallization behaviors of the surface and the interior of an obtained product tend to be consistent in the injection molding process of the polypropylene random copolymer.

This invention relates to the field of polyurethane materials technology, specifically disclosing a high-resilience polyurethane insole material and its preparation method. The polyurethane insole material comprises component A and component B, with a mass ratio of component A to component B of 100:90-95. Component A comprises the following raw materials: polyether polyol EP-330NG, polytetrahydrofuran ether diol, modified prepolymer, ADH dispersion, 1,4-butanediol, cyclopentane, polyether-modified silicone oil, composite catalyst, and deionized water; component B is carbodiimide-modified MDI. The preparation method involves mixing components A and B under high pressure and injecting the mixture into a preheated mold. After mold closing and curing, the mixture is demolded, and then subjected to oven treatment and room temperature curing to obtain the product. This invention, through the synergistic effect of block polyester, modified prepolymer, and ADH dispersion, results in an insole material with high resilience, low compression set, and good durability and molding stability.

A standard solution for basic nitrogen in a simulated oil product comprises acetanilide and the simulated oil product, the simulated oil product is composed of n-hexadecane, n-undecane, cyclopentane and isooctane according to the mass ratio of 1: (1.5-2.5): (2.5-3.5): (3.5-4.5), and the purity of the acetanilide is higher than 99 wt%, more preferably higher than 99.5%; the concentration of acetanilide in the standard solution is 0.1-1g / L. N-hexadecane, n-undecane, cyclopentane and isooctane in a specific ratio are used as solvents, the molecular structure is closer to that of light fuel oil, the selected components are stable in chemical property, and the chemical stability of a standard solution can be guaranteed; acetanilide has typical characteristics of organic nitrogen compounds in oil products, and when acetanilide is used as a representative of organic nitrogen, the acetanilide is single in source and stable in chemical property; the purifying agent is used for removing trace unsaturated hydrocarbon in the simulated oil product, and polymerization of the unsaturated hydrocarbon in the long-term storage process can be eliminated. The acetanilide concentration change amplitude of the obtained standard substance solution within one year is less than 1%.

The invention discloses a preparation method of cyclopentanol, which comprises the following steps: in a closed reactor, reacting a mixture containing a catalyst, a solvent, an oxidizing agent and cyclopentane to obtain cyclopentanol, the catalyst is a zirconium-silicon hierarchical pore molecular sieve catalyst. The zirconium-silicon hierarchical pore molecular sieve catalyst provided by the invention is simple to prepare and has wide pore size distribution. Meanwhile, hydrogen peroxide is used as an oxidant, and the method is low in three-waste. Therefore, cyclopentanol can be prepared by green and efficient oxidation of cyclopentane, and the catalyst has excellent selectivity.