465 results about "Pentane" patented technology

The invention relates to the field of materials, in particular to a silicon dioxide aerogel composite thermal insulation material and a preparation method thereof. The silicon dioxide aerogel composite thermal insulation material is prepared by taking silicon dioxide aerogel, phenolic resin, a nano zirconium oxide graft and a locust bean gum graft as main raw materials and taking n-pentane, UV-327, hexamethylenetetramine and an antioxidant 1010 as auxiliary materials. The nano zirconium oxide graft and the locust bean gum graft are added into the silicon dioxide aerogel material, so that the prepared silicon dioxide aerogel composite material has excellent heat-insulating property, flame-retardant property and toughening effect, and the comprehensive requirements of the use scene of the silicon dioxide aerogel composite material on toughness and flame retardance are met; and the application market is expanded.

The utility model relates to a mineral wool sandwich board PIR edge sealing production system which comprises a white material storage tank, a pentane storage tank, an on-line cutting precision mixer, a transition tank, a black material storage tank and a mixing head. Due to the fact that the using amount of edge sealing materials is small, the mixing effect of polyester and pentane is affected, and edge sealing sandwich boards with high fire resistance cannot be manufactured, the system cuts, extrudes, impacts and disperses white materials and pentane in the mixer by increasing flow feeding, and the mixing effect is improved. Due to the fact that the premixing white material amount consumed by the mixing head is small, discharging of the mixing head cannot be interrupted, and the output of the premixing white material is different from the premixing white material amount consumed by the mixing head, in order to achieve flow balance of the premixing white material and the premixing white material amount consumed by the mixing head, flow balance is achieved by increasing the premixing white material flow + intermittent feeding = small flow of the mixing head + continuous discharging. The middle transfer transition device caches the premixed white material to solve the problem of uninterrupted discharging of the mixing head so as to achieve continuous production, and the major problem that online mixing foaming cannot be achieved due to small flow of polyester and pentane is successfully solved.

The present disclosure relates to pharmaceutically acceptable salts, cocrystals, and crystalline forms thereof, of a compound which is N—((S)-1-(3-(4-chloro-3-(methylsulfonamido)-1-(2,2,2-trifluoroethyl)-1H-indazol-7-yl)-6-(3-methyl-3-(methylsulfonyl)but-1-yn-1-yl)pyridin-2-yl)-2-(3,5-difluorophenyl)ethyl)-2- ((3bS,4aR)-5,5-difluoro-3-(trifluoromethyl)-3b,4,4a,5-tetrahydro-TH-cyclopropa[3,4]cyclopenta[1,2-c]pyrazol-1-yl)acetamide, which is useful in the treatment of a Retroviridae viral infection including an infection caused by the HIV virus.

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

This invention provides an environmentally friendly expandable polystyrene bead and its preparation process, belonging to the field of foaming material technology. The preparation process includes the following steps: S1, injecting 65.28g of deionized water into a reaction vessel, stirring, adding 0.13g of dispersant and 0.16g of composite stabilizer, dispersing for 20min, then adding 31.95g of styrene monomer and 0.3g of composite initiator, followed by the addition of pentane and SiO2 micelle composite to obtain a base solution; wherein the mass ratio of pentane to SiO2 micelle composite is 1:(0.2-0.3); the mass of pentane is 3.1%-3.2% of the mass of the base solution; S2, subjecting the base solution to stepwise heating at 86℃-140℃ with stirring, then stopping heating, continuing stirring, and allowing it to cool naturally to 40℃, then stopping stirring, with a total reaction time of 8.5-9.5h to obtain the reaction product; S3, discharging the material, washing the reaction product with warm water, filtering, and obtaining the environmentally friendly expandable polystyrene beads. This invention improves the average particle size of expandable polystyrene beads while reducing fine powder.

The invention relates to the technical field of organic pollutant degradation, and discloses a mycobacterium and a method for degrading alkane organic pollutants. The Mycobacterium sp. Is named as SLQ-1, the Mycobacterium sp. Is preserved in the China Center for Type Culture Collection on January 15, 2024, and the preservation number is CCTCC No: M 2024107. The Mycobacterium sp. Is named as SLQ-1, and the Mycobacterium sp. Has been preserved in the China Center for Type Culture Collection on January 15, 2024. The mycobacterium can effectively degrade alkane organic pollutants, especially organic pollutants below C8, SLQ-1 can grow and breed with 3-methylpentane as a carbon source and an energy source, 3-methylpentane is efficiently degraded, and the mycobacterium can adapt to a wide temperature range and a wide pH range (the degradation rate of 3-methylpentane can reach 99% or above when the pH is 6-8 and the temperature is 30-40). In addition, the mycobacterium SLQ-1 can also take 2-methylpentane, n-hexane, n-pentane and 2-methylbutane as a carbon source and an energy source, and can efficiently degrade the 2-methylpentane, the n-hexane, the n-pentane and the 2-methylbutane.

The invention belongs to the technical field of drug synthesis, and particularly relates to an adamantane derivative as well as a synthesis method and application thereof. The adamantane derivative comprises an intermediate structural formula I, an intermediate structural formula II and an intermediate structural formula III, and the structural general formula is as follows: Linker is substituted or unsubstituted C6-C10 aroyl, R1 is hydrogen or C1-C6 alkyl, R2 is hydrogen, C1-C6 alkyl or a nitrogen-containing or nitrogen-free structural fragment, or the integral structure of R1R2 is N-substituted heterocyclic pentyl or heterocyclic cyclohexyl. According to the adamantane derivative provided by the invention, an adamantane structure is combined with part of groups of OAB-14, and a parent nucleus structure is changed, so that the drug activity is improved. The invention also provides a synthesis method of the compound, the obtained compound is screened through cell viability research, and the compound has a potential synergistic effect in the aspects of preventing influenza and treating Alzheimer's disease.

The invention belongs to the technical field of organic synthesis, and provides a preparation method of a cationic lipid compound, which comprises the following steps: (1) reacting 1, 5-dihalopentane, 2-tert-butyl glycolate and alkali to obtain a product G; (2) hydrolyzing the product G under an acidic condition to obtain a product H; (3) carrying out esterification reaction on the product H, the raw material C, 4-dimethylaminopyridine and a condensing agent in dichloromethane to obtain a product J; and (4) carrying out amination reaction on the product J, the raw material L and alkali in acetonitrile to obtain the cationic lipid compound. Compared with the prior art, the method has the relatively remarkable advantages that when the first part of halogenated long-chain alkyl ester H is synthesized by the method, 1, 5-dihalopentane and 2-tert-butyl glycolate are used as raw materials, the halogenated long-chain alkyl ester J is synthesized by a simple method, the product is obtained at a higher yield in synthesis, and the method is suitable for kilogram-level production. The route synthesis only comprises four steps of chemical reactions, and is suitable for industrial production.

The invention provides pharmaceutical compositions comprising about 0.05 to 0.1% (w / v) cyclosporine dissolved in 1-perfluorobutyl-pentane for use in the topical treatment of dry eye disease and provides for dosing and treatment methods thereof. The invention further provides kits comprising such compositions.

Disclosed herein are compositions and formulations of 3-fluoro-5-(((1S,2aR)-1,3,3,4,4-pentafluoro-2a-hydroxy-2,2a,3,4-tetrahydro-1H-cyclopenta[cd]inden-7-yl)oxy)benzonitrile (Compound (I)), wherein Compound (I) has the structure (I) and methods of making and using such compositions and formulations.

The invention belongs to the technical field of medicine synthesis, and particularly relates to a memantine derivative and a synthesis method and application thereof. The memantine derivative comprises an intermediate structural formula I, an intermediate structural formula II, an intermediate structural formula III and a structural general formula, Linker is substituted or unsubstituted C6-C10 aroyl, R1 is hydrogen or C1-C6 alkyl, R2 is hydrogen, C1-C6 alkyl or a nitrogen-containing or nitrogen-free structural fragment, or the integral structure of R1 and R2 is N-substituted heterocyclic pentyl or heterocyclic cyclohexyl. According to the memantine derivative provided by the invention, a memantine group is combined with an OAB-14 partial structure to change a parent nucleus structure, so that the drug activity is improved. The invention also provides a synthesis method of the compound, and the obtained compound is used for treating Alzheimer's disease and Parkinson's disease.

The application belongs to the field of catalyst synthesis, and relates to a polymer polynuclear boron organic catalyst, a preparation method and application thereof, the preparation method of the catalyst comprises the following steps: adding tetrahydrofuran into a catalyst precursor, then adding a borohydride reagent drop by drop, heating the reaction mixture at 25-80 DEG C for 22-26 h, vacuum concentrating the reaction mixture to obtain a crude product, purifying the crude product by washing with pentane for 2-5 times, and vacuum drying the product at normal temperature for 10-14 h to obtain the catalyst; the catalyst precursor and a preparation method thereof are also provided; the polymer polynuclear boron organic catalyst provided by the application has the advantages of high activity, simple preparation method and low cost, and the catalyst can control the polymer substrate type and the polymer type by adjusting the reaction conditions, the catalytic system and the substrate, and can efficiently prepare polymers such as polyether, polyester and polycarbonate due to the synergistic effect of the polynuclear boron center, so that the types of the organic catalyst and the polymer are greatly expanded.

The invention relates to the technical field of organic synthesis, in particular to a method for synthesizing cyclopentane compounds through [3 + 2] cycloaddition reaction of aryl cyclopropane and olefin under the synergistic catalysis of bromide ions / visible light. The method comprises the following steps: in a nitrogen atmosphere, sequentially adding aryl cyclopropane, a benzyl malononitrile derivative, pyridine tribromide and a photocatalyst into a reaction solvent to obtain a mixture, stirring the mixture at the temperature of 40 DEG C under the irradiation of a 12W blue light LED lamp until the reaction is complete, and performing concentration and column chromatography purification to obtain the cyclopentane compound. The method has the advantages of mild reaction conditions, simple operation, simple and easily available raw materials and low cost.

The invention discloses a zinc transition metal coordination polymer and a preparation method and application thereof, and relates to the technical field of metal-organic framework material photocatalysts, the chemical formula of the zinc transition metal coordination polymer is [Zn2 (L) 2 (byp)] n, and the zinc transition metal coordination polymer is prepared from 3, 3 '-(1, 2-phenyl dimethylene diether) dibenzoic acid ligand (H2L), 1, 2, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1, 3, 4-tetramethyl-1 The polymer is prepared by co-dissolving 1, 5-bis (2-methyl-1-imidazolyl) pentane ligand (pyp) and Zn (Ac) 2.6 H2O in an aqueous solution, and the polymer has a wide prospect in application of photocatalytic degradation of antibiotics as a photocatalyst.

A cyclopentane liquid pipeline conveying and drying device comprises a concentric-square-shaped pipe, a lower liquid inlet pipe, an upper liquid discharging pipe, a first control valve, a second control valve, a first drying mechanism and a second drying mechanism. The rectangular-ambulatory-plane pipe of the long structure is divided into two branches, liquid enters from the lower liquid inlet pipe and is discharged through the upper liquid discharging pipe, in this way, the liquid can be conveyed through one branch, and when the liquid is conveyed through one branch of the rectangular-ambulatory-plane pipe, switching is conducted, for example, when the liquid is conveyed through the first drying mechanism, the liquid is conveyed through the second drying mechanism. When the first drying mechanism reaches adsorption saturation, the branch of the first drying mechanism is closed through the first control valve, then the second control valve is opened, liquid conveying of the branch of the second drying mechanism is achieved, then a drying agent in the first drying mechanism is updated and regenerated, use is convenient and flexible, and operation is efficient.

The invention discloses a metal powder injection molding process based on a thermal degreasing adhesive, and belongs to the technical field of metal powder metallurgy molding, and the metal powder injection molding process comprises the following steps: weighing raw materials, preheating and activating to obtain a premixture, melting and mixing to obtain an adhesive, extruding and granulating, obtaining feeding particles, carrying out injection molding to obtain a product green body, sintering and thermally degreasing, and cooling. A pure thermal degreasing process is adopted, dangerous chemical reagents such as nitric acid and oxalic acid do not need to be used, solvents such as n-pentane and carbon tetrachloride do not need to be depended on, in actual production, potential safety hazards in the production link can be greatly reduced, damage to the ecological environment is reduced, meanwhile, the body health of operators is guaranteed, and the production cost is reduced. The core requirements of modern industry on safe and environment-friendly production are met.

The invention relates to the technical field of polyurethane foam preparation, and discloses polyurethane foam for a heat insulation strip and a preparation method of the polyurethane foam. The polyurethane foam is prepared from the following raw materials in parts by weight: 40 to 60 parts of polytetrahydrofuran ether glycol, 10 to 15 parts of modified monomer, 1 to 5 parts of ethylenediamine, 1 to 5 parts of hydroxyethyl methylacrylate, 60 to 80 parts of diphenylmethane diisocyanate, 3 to 5 parts of modified filler, 0.3 to 0.5 part of benzophenone and 10 to 15 parts of n-pentane. Double bonds on hydroxyethyl methylacrylate can react with sulfydryl on the surface of the modified filler, then a cross-linked network is formed in the material, the foam structure is more uniform and stable by limiting molecular chain movement and reducing gas diffusion and heat conduction paths, and the closed-cell rate of the foam can be increased by matching with a multi-layer coated hollow structure of the modified filler, so that the thermal conductivity of the foam is improved. And gas diffusion is reduced, so that the long-term stable heat insulation effect is maintained.

The utility model discloses a pentane gasification protection device and belongs to the technical field of pentane gasification. The protection device comprises a mounting table, a gasification tank arranged on one side of the mounting table, a detector fixedly mounted on the gasification tank, a control panel fixedly mounted on the mounting table, a gas conveying mechanism fixedly mounted on the mounting table and used for conveying gas to the gasification tank, and a liquid conveying mechanism fixedly mounted on the mounting table and used for conveying liquid to the gasification tank, the air conveying structure comprises a fan fixedly mounted on the mounting table and an air conveying pipe fixedly mounted on the fan; through cooperative use of the devices, the detector can send an abnormal signal to the control panel after detecting that the working environment is abnormal, and the control panel can quickly close the fan and interrupt gas supply in the gasification tank, so that the problem that manual treatment is not timely is avoided, possible loss is reduced to the minimum, and the safety of personnel and equipment is guaranteed.

The invention provides a cycloalkane separation method, a computer program product and a cycloalkane detection system. The method comprises the steps that a detection device is controlled to separate compounds, the one-dimensional retention time of all the compounds in a one-dimensional chromatographic column is obtained, the two-dimensional retention time of all the compounds in a two-dimensional chromatographic column is obtained, the one-dimensional retention time is the time needed for separating out the compounds through the one-dimensional chromatographic column, and the two-dimensional retention time is the time needed for separating out the compounds through the two-dimensional chromatographic column. The two-dimensional retention time is the time required for separating the compound by the two-dimensional chromatographic column; a target compound in the separated compounds is determined according to the one-dimensional retention time and the two-dimensional retention time of the separated compounds, and the target compound is cyclohexane or cyclopentane; the content of the target compound is obtained, the content is sent to target equipment, and the target equipment is equipment used by the target object, so that the target object is guided to improve the catalyst. According to the scheme, the problem that cycloalkanes (cyclohexane or cyclopentane) cannot be rapidly measured in the prior art is solved.

This invention discloses a method for the efficient conversion of isoparaffins, comprising the following steps: contacting a raw material containing isoparaffins and hydrogen with a catalyst in a reactor, reacting to obtain a product containing small molecule alkanes; wherein the isoparaffins are selected from at least one of isobutane, isopentane, neopentane, isohexane, and 3-methylpentane; wherein the small molecule alkanes are selected from at least one of ethane, propane, and n-butane; the catalyst is obtained by the following steps: mixing a metal acidic functional component, a metal basic functional component, a matrix precursor, a phosphorus auxiliary component precursor, a molding aid, and water, kneading, molding, and vacuum drying to obtain the catalyst.

The invention discloses a composite foaming agent, rigid polyurethane foam, a preparation method and application, and belongs to the technical field of rigid polyurethane materials. According to the technical scheme, the foaming agent comprises a first physical foaming agent, a second physical foaming agent, a chemical foaming agent and silanized cellulose nanocrystals, the first physical foaming agent is cyclopentane, the second physical foaming agent is a low-boiling-point foaming agent, and the chemical foaming agent comprises an organic amine salt compound. The foaming agent is applied to thermal insulation materials, and the problem that an existing foaming agent system cannot give consideration to heat conduction and foam strength well is solved.

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 application discloses a method for producing ethylene raw material. The method comprises the following steps: mixing hydrocracking light naphtha and hydrogen into a first hydroconversion reaction zone to react, and then the reaction effluent enters a separation system to obtain hydrogen-rich gas and a first hydroconversion product; the first hydroconversion product is separated to obtain ethane, propane, isobutane, isopentane and n-pentane; the isobutane is mixed with hydrogen into a second hydroconversion reaction zone, and the reaction effluent is separated to obtain n-butane; the second hydroconversion reaction zone is filled with a hydroconversion catalyst containing ZSM-35 molecular sieve; and the isopentane is recycled to the inlet of the first hydroconversion reaction zone. The first hydroconversion reaction zone is filled with a hydroconversion catalyst containing mordenite, and at least two catalyst beds are filled; and the active metal content of the hydroconversion catalyst decreases in turn along the flow direction. The method can effectively improve the proportion of normal alkanes in the product and improve the quality of the ethylene raw material.

Ethylene, alpha olefins, and other olefinically unsaturated monomers may be polymerized under fluidized bed polymerization reaction conditions in the presence of a Ziegler-Natta catalyst. A recycle stream featuring an induced condensing agent (ICA) comprising isobutane may increase catalyst productivity while maintaining quality of the polymer product, particularly when the recycle stream is delivered to a reactor containing the fluidized bed under conditions suitable to form a condensed or super-condensed mode in the recycle stream. The recycle stream may comprise unreacted olefinic monomers, and isobutane or a mixture of isobutane and isopentane.

The present application relates to an electrolyte composition for a lithium secondary battery and a lithium secondary battery comprising the same, the electrolyte composition comprising a lithium salt and an organic solvent. The organic solvent includes a first ether solvent (R-O-R ') having a fluorinated alkyl group, and a second ether solvent. The first ether solvent may be 5-ethoxy-1, 1, 2, 2, 3, 3, 4, 4-octafluoropentane, 1, 1, 2, 2, 3, 3, 4, 4-octafluoro-5-methoxypentane, or a mixture thereof, and the second ether solvent may be selected from the group consisting of dimethoxyethane, diethyl ether, and similar ethers. The lithium salt includes a compound such as LiTFSI, LiFSI, or LiPF6. The first ether solvent accounts for 30% to 90% by volume of the electrolyte, wherein the concentration of the lithium salt ranges from 0.1 M to 3.0 M. The electrolyte composition enhances battery stability and makes it suitable for use in lithium secondary batteries and lithium metal secondary batteries.

The invention provides a crystal form VI of an acrylamide compound, and the acrylamide compound is (S)-N-(5-((6-(2-(7, 7-dimethyl-1-oxo-1, 3, 4, 6, 7, 8-hexahydro-2H-cyclopentane [4, 5] pyrrolo [1, 2-a] pyrazine-2-yl)-3-(hydroxymethyl) pyridine-4-yl)-4-methyl-3-oxo-3, 3, 4-triazolo [1, 2-a] pyrazine-2-yl)-3-(hydroxymethyl) pyridine-4-yl)-4-methyl-3-oxo-3, 3, 4-triazolo [1, 2-a] pyrazine-2-yl)-3-(2, 3, 4-triazolo [1, 2-a] pyrazine-2-yl)-4- The crystal form VI is a 2-(2, 4-dihydropyrazine-2-yl) amino)-2-(2-methyl-4-(tetrahydro-2H-pyran-4-yl) piperazine-1-yl) 5phenyl) acrylamide compound, and an X-ray powder diffraction pattern of the crystal form VI comprises diffraction peaks with the following 2 theta angle values: 8-3 + / -0.2 degrees, 13.2 + / -0.2 degrees and 18.9 + / -0.2 degrees. The crystal form VI has the advantages of good stability and low hygroscopicity, and is suitable for industrial production of bulk drugs and development of preparation prescriptions.

The invention provides a preparation method and application of lipid nanoparticles based on lipoic acid derivatives. The lipoic acid derivative provided by the invention depends on a cyclopentane structure and a disulfide bond of lipoic acid, so that a lipid compound is more easily internalized by cells, and the effectiveness of nucleic acid delivery is improved. The lipid nanoparticles have excellent spleen targeting performance, and drugs are preferentially delivered to the spleen.

The invention relates to the field of rigid polyurethane foam materials, and particularly provides a polyurethane cold storage plate composite material as well as a preparation method and application thereof, n-isopentane is matched and used according to a specific proportion, so that the problem of poor dimensional stability of a polyurethane foam material at a low temperature is solved, the foaming process is stable, foam pores are relatively small, and the cold storage plate composite material can be used for cold storage plates. And the formed foam structure is uniform and fine, and has good mechanical property and thermal insulation property. The insulation board is mainly used for cold storage insulation, refrigerator insulation, refrigerator car insulation and the like, and has the advantages of low heat conductivity coefficient, good mechanical property, light weight and the like.