91 results about "Pentane" patented technology

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 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.

This invention discloses a high-strength and tough PET foam sheet and its preparation method, belonging to the field of foam material technology. It comprises the following raw materials in parts by weight: 100 parts food-grade PET resin, 3-7 parts melt reinforcing agent, 3-5 parts crystallization toughening agent, 1-3 parts in-situ fiber-forming reinforcing agent, 1-5 parts compatibility dispersant, and 8-10 parts cyclopentane. The preparation method includes: S1, mixing dried food-grade PET resin with melt reinforcing agent, crystallization toughening agent, in-situ fiber-forming reinforcing agent, and compatibility dispersant to obtain a premix; S2, melting and plasticizing the premix, injecting liquid cyclopentane for blending, and then extruding to a normal pressure environment to obtain a foam sheet blank; S3, cooling and shaping the foam sheet blank, drawing, trimming, and winding to obtain a high-strength and tough PET foam sheet. The foam sheet obtained by this invention has fine and uniform pores, possessing high flexural strength, high modulus, and high impact toughness, with comprehensive performance far exceeding that of traditional PET foam materials.

The application discloses a kind of thieno [2, 3-c] pyrazole compounds in preparation antitumor drug purposes, belong to pharmaceutical chemistry technical field.The application provides a kind of small molecule skeleton thieno [2, 3-c] pyrazole compound I and II, compound I is 2-oxo benzo [d] [1, 3] oxathiole-6-yl 1-(3-fluorophenyl)-3-methyl-1H-thieno [2, 3-c] pyrazole-5-carboxylate.Compound II is 1-(4-chlorophenyl)-N-[4-((4-ethylpiperazine-1-yl)methyl)phenyl]-3-methyl-1H-thieno [2, 3-c] pyrazole-5-formyl.Both have strong antitumor activity.Compound II has strong inhibition to a variety of human tumor cells, such as bone sarcoma MG63, breast cancer HCC1806, liver cancer LM3, lung cancer A549, colorectal cancer HCT-8 and the like, provides new candidate compounds for broad-spectrum antitumor drugs.

This application discloses a method for the conversion of C4-C6 alkanes. In a reactor, a raw material containing hydrogen and C4-C6 alkanes is contacted with a catalyst and reacted to obtain a product containing small molecule hydrocarbons; the C4-C6 alkanes are selected from at least one of n-butane, isobutane, n-pentane, isopentane, and 2,3-dimethylbutane; the small molecule hydrocarbons are selected from at least one of ethane, propane, n-butane, and n-pentane; the catalyst is prepared by the following steps: (1) mixing clay and sol, spray drying to obtain microspheres with a diameter of 1-50 μm; (2) immersing the microspheres in an aqueous solution containing a noble metal precursor, drying I, calcining I, and treating with a hydrogen atmosphere to obtain a catalyst precursor; (3) mixing the catalyst precursor, molecular sieve, and additives, rolling to form spheres, drying II, calcining II, and reducing to obtain the catalyst.

The application discloses a method for normalizing isomeric alkanes, which comprises the following steps: contacting isomeric alkanes and hydrogen with a catalyst in a reactor to obtain normal alkanes; the isomeric alkanes are selected from at least one of isobutane and isopentane; the catalyst is composed of an acidic carrier, a noble metal active component supported on the surface of the acidic carrier and an auxiliary element; the noble metal active component is selected from at least one of Pt and Pd; the auxiliary element is selected from at least one of Ce, Sn, La, Fe, Co, Ni and Cu; and the carrier is selected from at least one of molecular sieve, Al2O3 modified SO4 2‑ -WO3-ZrO2; the mass ratio of the noble metal active component to the acidic carrier in the catalyst is 0.0001-0.01:1; and the mass ratio of the auxiliary element to the acidic carrier is 0.0001-0.008:1.

This invention belongs to the technical field of drug synthesis, specifically relating to memantine derivatives, their synthetic methods, and applications. The memantine derivatives include intermediate structural formulas I, II, and III, as well as a general structural formula. The linker is a substituted or unsubstituted C6-C10 aryl group, R1 is hydrogen or a C1-C6 alkyl group, and R2 is hydrogen, a C1-C6 alkyl group, or a nitrogen-containing or nitrogen-free structural fragment, or the overall structure of R1 and R2 is an N-substituted heterocyclopentyl or heterocyclohexyl group. The memantine derivatives provided by this invention improve drug activity by combining the memantine group with the OAB-14 partial structure, thereby altering the core structure. This invention also provides a synthetic method for the obtained compounds used in the treatment of Alzheimer's disease and Parkinson's disease.

A fiber-reinforced lithium borohydride-based all-solid-state electrolyte for suppressing dendrite formation, its preparation method, and its application are disclosed. The method employs a reverse micelle precipitation method to prepare a precursor solution by dissolving lithium borohydride and lithium iodide in an ether solvent solution. Aluminum oxalate and vapor-grown carbon fibers are then added, followed by dropwise addition to an isopentane solution containing a surfactant. After reverse micelles form, the solution is allowed to settle and react completely, and the solvent is thoroughly removed. The product from the settled reaction is dried and then subjected to partial hydrogen release treatment. The partially hydrogen-released product is dispersed in a benzene solution containing polymethyl methacrylate, freeze-dried, and then melt-reacted in situ in a universal mold. This process is simple and highly controllable, significantly improving the mechanical stability and dendrite resistance of the lithium borohydride-based all-solid-state electrolyte, and enabling long lifespan of all-solid-state lithium batteries under fast-charging conditions, thus facilitating commercial applications.

The application discloses a preparation method of a single-center catalyst system and application thereof, and the preparation method comprises the following steps: (1) performing vacuum distillation on a modified methylaluminoxane solution, separating out a solvent and aluminum alkyl to obtain a solid product; (2) dissolving the solid product obtained in step (1) with a pentane solution to obtain a homogeneous solution with different aluminum contents; and (3) combining the homogeneous solution obtained in step (2) with a single-active-center catalyst to form a catalyst system. When the single-active-center catalyst system is used for preparing polyethylene wax, different solvents can be avoided from being introduced into a polymerization system, a process flow of the polyethylene wax is simplified, and energy consumption for solvent separation is reduced; reduction of active aluminum helps to improve polymerization activity, the obtained polyethylene wax has lower metal content and narrower molecular weight distribution, the devolatilization efficiency of the polyethylene wax is improved, and the obtained polymer has a VOCs content lower than 20 ppm.

The present application relates to the technical field of pentane application, and particularly relates to a pentane application system and a control method, which comprises a pentane storage tank used for storing liquid pentane, a liquid supply assembly in communication with the pentane storage tank, a gasifier in communication with the liquid supply assembly, the liquid supply assembly being capable of conveying the liquid pentane in the pentane storage tank into the gasifier, and a heating assembly comprising a heating medium inlet pipeline and a heating medium outlet pipeline in communication with each other, the heating medium inlet pipeline and the heating medium outlet pipeline being both arranged on the gasifier, a pressure sensor arranged on the gasifier and electrically connected with the electric control throttle valve. The present application can ensure the continuity of production, thereby ensuring the cutting efficiency and improving the safety of pentane gasification.

A method for preparing 1,2-pentanediol and co-producing 2,3-epoxypentane, 2,3-epoxy-2-methylbutane, and 1,2-epoxy-2-methylbutane involves using the residual C5 from cracked ethylene as the reactant, an organic peroxide as the oxidant, and a titanium-silicon molecular sieve as the catalyst to undergo a catalytic oxidation reaction. The resulting reaction products are then separated by distillation. The residual C5 component is collected at the top of a first distillation column, and the bottom product is transferred to a second distillation column. Epoxyalkane is collected at the top of the second distillation column. The collected epoxyalkane is transferred to a third distillation column, where 1,2-epoxy-2-methylbutane and 2,3-epoxy-2-methylbutane are collected at the top, and 2,3-epoxypentane and 1,2-epoxypentane are collected at the bottom. The bottom product of the third distillation column is then subjected to an alkaline hydrolysis reaction. The mixture obtained from the alkaline hydrolysis reaction is further distilled to separate 1,2-pentanediol and 2,3-epoxypentane. This invention provides a green and environmentally friendly method for the high-value utilization of C5 residue from cracked ethylene.

The present disclosure relates to PI3Kα inhibitors, their crystalline forms, solvates, compositions, and methods of use. For example, the present disclosure describes solid forms of compounds including the crystalline solid form of the following compounds: N-((1S,2R,4S)-4-(((S)-(3-chloro-2,6-difluorophenyl)(4-fluorobicyclo[2.2.1]heptane-1-yl)methyl)carbamoyl)-2-hydroxycyclopentyl)pyrimidine-5-carboxamide; and (1S,3S,4R)-3-acetamido-N-((S)-(3-chloro-2,6-difluorophenyl)(4-fluorobicyclo[2.2.1]heptane-1-yl)methyl)-4-hydroxycyclopentane-1-carboxamide.

This invention discloses a polyurethane foam, its preparation method, and its applications. The polyurethane composition, by weight, comprises the following components: 55-100 parts polyether polyol, 0-45 parts polyester polyol, 0.7-7 parts surfactant, 3-17 parts composite catalyst, 0.7-9 parts water, 7-65 parts composite blowing agent, and isocyanate with an isocyanate index of 1.1-1.6. The composite blowing agent, by weight (100%), comprises 9-70% pentane, 3-75% decafluorocyclopentane, and 0-35% butane. The blowing agents used in this invention produce a synergistic effect, reducing the defects caused by using individual physical blowing agents alone. This allows customers to obtain polyurethane products with superior foam performance, providing better choices for ultra-low energy consumption and inner liner materials in the industry.

This application discloses an organic compound and its uses, as well as an organic electroluminescent device, relating to the field of organic electroluminescent materials technology. The organic compound has the structural formula shown in formula (I): L1 and L2 are each independently selected from single bonds, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C5-C30 heteroaryl groups, and do not contain triazine or its derivatives, carbazole or its derivatives, or anthracene or its derivatives; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C5-C30 heteroaryl groups, or formed into a ring with adjacent atoms; R1 and R2 are each independently selected from substituted or unsubstituted methyl groups, substituted or unsubstituted tert-butyl groups, substituted or unsubstituted cyclopentyl groups, substituted or unsubstituted hexyl groups, or substituted or unsubstituted adamantyl groups, and the substituent is deuterium when substituted; the hydrogen in the organic compound can optionally be replaced with deuterium. This organic compound can significantly improve the performance of organic electroluminescent devices.

The application discloses a method for preparing high-quality cracking material, which comprises the following steps: contacting C5 alkanes and hydrogen with a catalyst in a reactor, and reacting to obtain high-quality cracking material; the C5 alkanes are at least one selected from normal pentane and isopentane; the high-quality cracking material is at least one selected from ethane, propane, normal butane and normal pentane; the catalyst is composed of an acidic carrier and a noble metal active element and an auxiliary element supported on the surface of the acidic carrier; the noble metal active element is at least one selected from palladium and platinum; the auxiliary element is at least one selected from potassium and iron; in the catalyst, the mass ratio of the noble metal active element to the acidic carrier is 0.0001-0.005:1, and the mass ratio of the auxiliary element to the acidic carrier is 0.002-0.05:1.

The present application provides a kind of production solvent oil hydrogenation process, comprising the following steps: (1) reforming raffinate oil raw material is cut to obtain light component and heavy component;(2) the paraffin-containing raw material and heavy component enter the hydrofining reaction zone, and after the reaction is completed, hydrofining product oil is obtained;(3) hydrofining product oil is treated by stripping to obtain gas phase stream and liquid phase stream;(4) the liquid phase stream enters the de-aromatic reaction zone to carry out hydrodearomatization reaction to obtain a series of solvent oil products.The present application realizes the co-production of different types of high-quality solvent oils such as n-alkane / isomerized alkane solvent oil, pentane blowing agent, food additive n-hexane / industrial n-hexane, vegetable oil extraction solvent and food-grade petroleum ether based on the selection of raw materials and processing path, and the entire production process can be operated stably for a long period.

The present application relates to a kind of n-hexane-methylcyclopentane energy-saving rectification separation system and process, belong to separation process technical field;The separation system includes extractive distillation column and extractive agent regenerator, the bottom of the extractive distillation column is communicated with heat pump reboiler and extractive agent regenerator middle portion by circulating pump respectively;The heat pump reboiler is communicated with the lower part of extractive distillation column by heat exchange reboiler;The bottom of the extractive agent regenerator is connected with heat pump evaporator by the heat exchange reboiler, the heat pump evaporator is communicated with the heat pump reboiler by heat pump compressor, the heat pump reboiler is sequentially connected with supercooling cooler and pressure reducing valve, the pressure reducing valve is communicated with the heat pump evaporator by pipeline.The high-temperature regenerated extractive agent produced by extractive agent regenerating unit is directly used as heat source to provide part of heating for extractive distillation column in the present application, realize the step-by-step utilization of high-temperature extractive agent waste heat, significantly reduce the external heating load of extractive distillation column, reduce system energy consumption.

This invention belongs to the field of catalysis technology, specifically relating to a method for preparing cyclopentane derivatives from furan compounds. The method includes the following steps: mixing a furan compound, a copper-based catalyst, a halogen modifier, and a first solvent, and reacting them under a hydrogen atmosphere; the halogen modifier is at least one selected from sodium chloride, sodium bromide, potassium chloride, potassium bromide, chlorobenzene, and bromobenzene. This invention, by adding a halogen modifier to the catalytic system, introduces halogen components onto the surface of the copper-based catalyst to construct Cu-halogen active centers, achieving highly selective rearrangement of furan compounds into cyclopentane derivatives under relatively mild conditions, while significantly suppressing condensation side reactions, improving carbon utilization efficiency, and reducing dependence on the type of support.

The application discloses a method for preparing normal paraffin, comprising the following steps: contacting isomeric alkanes and hydrogen with a catalyst in a reactor, and reacting to obtain normal paraffin; the isomeric alkanes are selected from at least one of isobutane and isopentane; the catalyst is composed of a double-layer spherical carrier and a noble metal active component loaded on the surface of the double-layer spherical carrier; and the noble metal active component is selected from at least one of platinum, palladium and gold.

This invention discloses a zinc oxide capsule, a polypropylene antibacterial coating, its preparation method, and its application. The preparation method of the zinc oxide capsule includes: S1. mixing zinc oxide, emulsifier, initiator, triethylamine, and water to obtain a core material mixture; S2. mixing acrylic acid monomers and an organic phase change material to obtain a wall material mixture; S3. mixing the core material mixture and the wall material mixture, and heating to react, thereby obtaining the zinc oxide capsule; in step S2, the acrylic acid monomers contain acrylic acid, resveratrol, and allylcyclopentane in a mass ratio of 1:(0.1-1.5):(0.1-1). The zinc oxide capsule prepared by this invention can simultaneously improve the antibacterial effect, adhesion, wear resistance, and aging resistance of the polypropylene antibacterial coating.

The present application relates to the technical field of polyethylene production, in particular to an additive for inhibiting black particles generated in the polyethylene granulation process and a preparation method thereof. The additive comprises the following components: vinylidene fluoride and hexafluoropropylene; the fluorine content in the additive is 30-60% by mass fraction. The additive preparation method comprises the following steps: taking vinylidene fluoride material and hexafluoropropylene material, preparing an oil by an emulsion polymerization method or a free radical solution polymerization method, cleaning the oil with pentane, and drying until the mass is constant to obtain the additive. The additive effectively reduces the number of black particles generated in the polyethylene granulation process, can improve the tensile strength and light transmittance of film products, delays the melt rupture, improves the energy utilization efficiency, and reduces the production cost, energy consumption and material consumption.

This invention discloses the application of a eutectic material based on ethyl column[5] aromatics in the visual adsorption separation of a mixture of n-pentane and isoprene. The macrocyclic eutectic material formed by ethyl column[5] aromatics and 3,5-dinitrobenzonitrile is used to selectively adsorb and separate n-pentane from a mixture of n-pentane and isoprene. During the adsorption and separation of n-pentane and isoprene, a visual color change is observed. The separation process does not require distillation, has low energy consumption, and is fast. The visible color change phenomenon during the adsorption of n-pentane provides visual monitoring of the separation process. Furthermore, the eutectic material used has high stability, can be recycled, and has stable separation performance.

This invention proposes a ratiometric fluorescent probe molecule for detecting peroxynitrite, its preparation method, and its application, aiming to solve a problem in the technical field of fluorescent sensing materials. The ratiometric fluorescent probe molecules of this invention are HPIP-T-BnB and HPIP-K-BnB. The structural formulas of HPIP-T-BnB and HPIP-K-BnB are: [Insert structural formula here], and the structural formulas of HPIP-K-BnB are: [Insert structural formula here]. The preparation method includes the following steps: 4'-(diphenylamino)-4-(imidazo[1,2-a]pyridin-2-yl)-[1,1'-biphenyl]-3-ol or 4'-(9H-carbazole-9-yl)-4-(imidazo[1,2-a]pyridin-2-yl)-[1,1'-biphenyl]-3-ol undergoes a nucleophilic substitution reaction with 2-(4-(bromomethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxoborhecyclopentane to obtain HPIP-T-BnB and HPIP-K-BnB. The probes prepared in this invention can detect ONOO⁻ with high selectivity, high sensitivity, and quantification, and have been successfully applied to ratiometric fluorescence imaging of exogenous and endogenous ONOO⁻ in live cells. This provides a reliable and crucial tool for mechanism research and drug development in related diseases.

The invention relates to (i) an azeotropic or azeotrope-like composition comprising dichloromethane and trans-1H,2H-octafluorocyclopentane, (ii) a spinning fluid for flash spinning comprising the azeotropic or azeotrope-like composition and a polymer, and (iii) a process for producing a plexifibril of a polymer using the spinning fluid.

The present application provides a naphtha directional adsorption separation method, and relates to the technical field of petroleum chemical industry.The present application adopts a double desorption agent process flow, uses stronger adsorption force between high carbon alkanes (n-dodecane, n-tetradecane or n-hexadecane) and adsorbents, solves the problems of incomplete desorption of low carbon alkanes desorption agent and low separation yield, and thus significantly improves the separation efficiency of the process.Meanwhile, the use of low carbon alkanes (n-pentane or n-hexane) to replace high carbon alkanes on the adsorbents can avoid the residue of high carbon alkanes on the adsorbents, and affect the recycling of the adsorbents.The present application adopts the double desorption agent process flow, which can ensure high separation efficiency and improve the utilization rate of the adsorbents at the same time.The present application can efficiently separate n-alkanes in naphtha, and the separated n-alkanes can be used as high-quality cracking ethylene (propylene) raw materials;the adsorption residual oil rich in isomeric alkanes, naphthenes and aromatic hydrocarbons can be used as high-quality catalytic reforming aromatic hydrocarbon raw materials.

The application provides a method for preparing anhydrous formaldehyde from formaldehyde aqueous solution. The method comprises the following steps: adding C5-C10 straight-chain aliphatic alcohol into the formaldehyde aqueous solution, reacting at 50-100 DEG C under normal pressure for 1-3 hours to generate formaldehyde hemiacetal; the molar ratio of formaldehyde to the reaction agent is 1:1.0-1.5; adding an extractant into the reaction solution, and standing to separate into upper and lower layers; the upper layer is an organic phase containing the formaldehyde hemiacetal, the reaction agent and the extractant, and the lower layer is an aqueous phase; the extractant is at least one selected from n-pentane, n-hexane, cyclohexane and toluene; the mass ratio of the reaction agent to the extractant is 1:0.4-0.6; rectifying the organic phase to obtain the formaldehyde hemiacetal; and pyrolyzing the formaldehyde hemiacetal and absorbing the formaldehyde hemiacetal with methanol and / or ethanol to obtain a small-molecule alcohol solution of anhydrous formaldehyde. The technical problem to be solved is how to significantly reduce the dehydration energy consumption, improve the formaldehyde recovery rate and simplify the operation process under the premise of ensuring the purity of the anhydrous formaldehyde.

This invention discloses a fully bio-based 2,5-furandicarboxylic acid copolyester, its preparation method, applications, and closed-loop recycling method, belonging to the field of materials synthesis technology. Using bio-based dimethyl 2,5-dimethylfurandicarboxylate (DMFD), 1,4-butanediol (BDO), and (1R,3S)-1,2,2-trimethylcyclopentane-1,3-diethanol (TCDM) as raw materials, a high-performance 2,5-furandicarboxylic acid copolyester suitable for closed-loop chemical recycling was synthesized. This invention utilizes the aforementioned fully bio-based 2,5-furandicarboxylic acid copolyester, its preparation method, applications, and closed-loop recycling method. The addition of the (1R,3S)-1,2,2-trimethylcyclopentane-1,3-diethanol unit enhances the thermal and mechanical properties of the 2,5-furandicarboxylic acid copolyester, while also exhibiting excellent UV shielding and solvent resistance. It can be gently depolymerized and recycled with minimal loss of repolymerization performance, achieving a balance between high performance and recyclability.

This invention discloses a method for preparing 1,2-pentanediol, comprising using 2-pentanone as a substrate, adding 2-keto reductase, linalool dehydratase, formate dehydrogenase, lysozyme, coenzyme NAD+, and water to react and obtain n-pentene. The obtained n-pentene is then thoroughly mixed with ethanol. This mixture is then fed into a reaction system containing olefin monooxygenase, epoxide hydrolase, formate dehydrogenase, lysozyme, coenzyme NAD+, MgSO4, and water using a fed-batch method. After the n-pentene and ethanol mixture has been completely added, the reaction continues for a period of time, followed by extraction to obtain 1,2-pentanediol. This preparation method uses 2-pentanone as a raw material, catalyzing the synthesis of 2-pentanol via 2-keto reductase. 2-pentanol is then catalyzed by a dehydrating enzyme to generate n-pentene, which is then catalyzed by an olefin monooxygenase to generate 1,2-epoxypentane. Finally, epoxide hydrolase ring-opens the 1,2-pentanediol. This process requires only four enzymatic catalytic reactions for efficient synthesis.

This invention belongs to the field of catalytic reaction engineering and relates to a method for the selective hydrogenation of dicyclopentadiene to produce cyclopentene via depolymerization. Dicyclopentadiene undergoes continuous liquid-phase depolymerization in the bottom of a reactive distillation column. A mixture of decahydronaphthalene and ethylcyclohexane in the bottom of the column serves as the heating medium, directly contacting, mixing, and transferring mass and heat with the dicyclopentadiene. The heating medium inhibits the polymerization of DCPD and CPD to form other polymers. The depolymerization product, cyclopentadiene, and the entrained dicyclopentadiene are mixed with H2 and CO2 and enter the stripping section. The dicyclopentadiene continues to depolymerize. After depolymerization, it contacts, transfers mass and heat with the cyclopentane fraction refluxed from the rectification section, and undergoes selective hydrogenation on a hydrogenation catalyst (Pd-Pt-Ag@Al2O3) packed in the reactive distillation section. The product after selective hydrogenation passes through the rectification section, and cyclopentene with a purity greater than 99.5% is collected from the top of the column. This invention can achieve high selectivity and yield of the target product, cyclopentadiene.