53 results about "Isopentane" patented technology

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.

The utility model relates to the technical field of petrochemical engineering, and particularly discloses a cracking tail oil heat recovery system of a slurry bed residual oil hydrogenation device, which comprises a fractionating tower, a fractionating tower bottom pump, an aviation kerosene tower bottom heat exchanger, a debutanizer bottom heat exchanger, an isopentane tower bottom heat exchanger and a tail oil cold feed preheater, the fractionating tower bottom pump, the aviation kerosene tower bottom heat exchanger, the debutanizer bottom heat exchanger, the isopentane tower bottom heat exchanger and the tail oil cold feed preheater are sequentially arranged on the fractionating tower, and a tail oil discharge pipeline is arranged on the tail oil cold feed preheater. The tail oil temperature of the cracking device is reasonably utilized, the heat exchange process is optimized, efficient recovery of tail oil heat is achieved, the potential safety hazard of leakage of a heat exchange system of the isopentane tower is eliminated, temporary shutdown overhaul of the device caused by leakage of a heat exchanger is avoided, meanwhile, effective and stable control over the tail oil temperature is achieved, and the service life of the device is prolonged. The operation cost of tail oil air cooling is saved, and safe and stable operation of a heat exchange system of the device is effectively guaranteed.

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.

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 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.

The invention relates to the technical field of tail gas recovery, in particular to an isopentane tower tail gas recovery method, which comprises the following steps: exhaust gas from the top of an isopentane tower is discharged into an air cooler, and a part of air-cooled n-butane enters a top space position of a reflux tank through an air-cooled high-point non-condensable gas pipeline; the other part of the n-butane after air cooling is dissolved into the isopentane in the air cooling process, and is released through pressure reduction after entering the reflux tank, a part of the n-butane gas escapes from the isopentane, and a part of the isopentane gas is taken away while escaping and is mixed and polymerized with a non-condensable gaseous component at the top of the reflux tank; components at the top of the reflux tank enter the oil-gas separator, and are treated by the multi-stage demister and the multi-stage temperature change coil in the oil-gas separator, so that the n-butane in the tail gas of the isopentane tower can be effectively removed, and the separation and recovery of isopentane and n-butane oil gas can be quickly completed.

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 embodiment of the invention provides a novel environment-friendly foaming agent and polyurethane formula, and the foaming agent comprises the following components in parts by weight: 0.5-8 parts of trifluoropropene and 13-20 parts of cyclopentane or cycloisopentane. The novel environment-friendly foaming agent provided by the embodiment of the invention has the characteristics of environment friendliness, low thermal conductivity, high strength and the like, and has good flowability and demolding property. In addition, the embodiment of the invention also provides a novel environment-friendly polyurethane formula and a preparation method thereof.

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.

The present application relates to the technical field of aviation gasoline, and discloses unleaded aviation gasoline and a preparation method thereof.The unleaded aviation gasoline comprises: 75-85 wt% of polymethylbenzene, and 15-25 wt% of at least two of alkylate, a side line distillation component of an alkylate device, light naphtha and isopentane; wherein the motor octane number of the polymethylbenzene is not less than 108.The product quality index of the unleaded aviation gasoline meets the standard of the American Society for Testing and Materials, that is, the technical requirement of ASTM D7719-2018 high-aromatic unleaded aviation gasoline.The unleaded aviation gasoline has the characteristics of good component continuity, stable combustion and high motor octane number, and meets the high-standard use requirement of unleaded and high-octane aviation gasoline.

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 relates to an energy-saving and environment-friendly mixed working medium and application of the mixed working medium as a heat pump working medium, and belongs to the technical field of refrigerants. The mixed working medium is a ternary mixed working medium composed of three components of acetone, pentane (R601) and isopentane (R601a); and the mass percentage concentration of each component in the mixed working medium is as follows: the mass percentage of acetone is 37% to 64%, the mass percentage of pentane (R601) is 0.5% to 62.5%, and the mass percentage of isopentane (R601a) is 0.5% to 59.5%. The ternary mixed working medium obtained by controlling the detailed components constituting the working medium and the mass percentage of each component can especially obtain a heating temperature of 170 DEG C and above, and can be applied as a superhigh-temperature (temperature of 170 DEG C and above) heat pump working medium.

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 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 application discloses rigid polyurethane foam, a preparation method and a refrigeration appliance, comprising: a combined polyether; isocyanate; foaming agent I, the foaming agent I is one of cyclopentane and isopentane or a mixture composed of cyclopentane and isopentane in any proportion; foaming agent II, the foaming agent II is one of pentafluoropropane and trifluoro-chloro-propylene or a mixture composed of pentafluoropropane and trifluoro-chloro-propylene in any proportion; and foaming agent III, the foaming agent III adopts perfluoromethyl vinyl ether. By adding perfluoromethyl vinyl ether as a foaming agent, the application overcomes the foam cavity problem of a low-boiling-point foaming system, reduces the foam molding density, improves the supporting capacity of low-density rigid polyurethane foam, and has low cost and high practicability.

The invention relates to the field of fuel oil, and discloses a method for preparing lead-free gasoline, which comprises the following steps: distilling alkylated gasoline, taking a distillation product with a distillation range of 35-138 DEG C as cutting oil, and mixing 55-83 wt% of cutting oil, 3-14 wt% of isopentane, 3-15 wt% of C6-C10 aromatic hydrocarbon and an additive, the additive contains 10 to 20 weight percent of carbonic ester and 105 to 300 mg Mn / kg of carbonyl manganese. The key indexes of the lead-free gasoline provided by the invention meet the specification requirements of 100VLL in ASTM910 and 100LL high-grade aviation gasoline in GB1787, and meanwhile, the lead-free gasoline does not contain lead compounds, is low in aromatic amine and aromatic hydrocarbon content, and has lower toxic influence on the environment. In addition, the preparation process of the lead-free gasoline is simple, easy to operate and low in cost, and has industrial application prospects and remarkable economic and social benefits.

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.

The embodiment of the invention provides a novel environment-friendly foaming agent and polyurethane formula, and the foaming agent comprises the following components in parts by weight: 0.5-8 parts of propane and 13-20 parts of cyclopentane or cycloisopentane. The novel environment-friendly foaming agent provided by the embodiment of the invention has the characteristics of environment friendliness, low thermal conductivity, high strength and the like, and has good flowability and demolding property. In addition, the embodiment of the invention also provides a novel environment-friendly polyurethane formula and a preparation method thereof.

The invention relates to the technical field of fuel, in particular to high-cold-environment spark-ignition engine test standard oil and a preparation method thereof, and the high-cold-environment spark-ignition engine test standard oil comprises the following main components: a high-boiling-point aromatic hydrocarbon solvent SA1500, a high-boiling-point aromatic hydrocarbon solvent SA1000, alkylated oil, heavy naphtha, toluene, xylene, 1-octene, isopentene and isopentane. By virtue of the quality characteristics of high vapor pressure and highly stable index, the standard oil remarkably enhances the low-temperature volatile performance of fuel oil, ensures that an engine realizes rapid ignition and stable combustion in an extremely cold environment, provides reliable fuel guarantee for a high and cold test, and assists the performance optimization and technical breakthrough of the engine.

The invention relates to an energy-saving and environment-friendly mixed working medium and application thereof as a heat pump working medium, and belongs to the technical field of refrigerants. The mixed working medium is a ternary mixed working medium consisting of three components, namely acetone, pentane (R601) and isopentane (R601a); and the mixed working medium is prepared from the following components in percentage by mass: 37 to 64 percent of acetone, 0.5 to 62.5 percent of pentane (R601) and 0.5 to 59.5 percent of isopentane (R601a). The ternary mixed working medium is obtained by controlling the detailed components forming the working medium, the mass ratio of all the components and the like, especially can be used for preparing a heating temperature of 170 DEG C or above, and can be applied as an ultra-high-temperature (170 DEG C or above) heat pump working medium.

The invention relates to the field of alcohol-based fuels, and discloses a new energy alcohol-based fuel synthesis additive, which is prepared from the following component materials: methanol, tert-butyl alcohol, n-butyl alcohol, isopropanol, methyl tert-butyl ether, isopentane, ferrocene, a preservative and an antioxidant, and the preparation method comprises the following steps: S1, alcohol primary mixing and structure activation; s2, accurate introduction of ethers and hydrocarbons and phase state regulation and control; s3, nanometer dispersion and stabilization of the catalyst; s4, intelligent integration of functional additives; and S5, homogenization and quality control. Through synergistic proportioning of multiple components, the performance of the alcohol-based fuel is comprehensively improved, so that the problems of low-temperature starting, high oil consumption, high emission, knocking, air resistance, carbon deposition, colloid formation and the like are solved, and the effects of resisting freezing and supporting combustion, reducing oil consumption, enhancing power, cleaning tail gas, preventing corrosion and explosion, inhibiting air resistance, removing carbon deposition and preventing dissolving and degumming are achieved; and the fuel economy, the environmental protection property and the engine operation stability are improved.

The application discloses a purification method of tetramethylsilane, which comprises the following steps: S1, pre-purification treatment is performed on tetramethylsilane raw materials to obtain tetramethylsilane crude product; S2, the tetramethylsilane crude product is mixed with a catalyst, heated, and catalytic reaction is generated so that isopentane in the tetramethylsilane crude product is converted into isoamylene to obtain an intermediate product; and S3, rectification treatment is performed on the intermediate product to remove isoamylene in the intermediate product, and purified tetramethylsilane is obtained. According to the purification method of tetramethylsilane, most of the easily separated impurities in the tetramethylsilane raw materials are removed through pre-purification treatment, then the tetramethylsilane crude product is mixed with a catalyst, and the difficult-to-separate isopentane impurities are converted into isoamylene under the catalytic action of the catalyst; the boiling point of isoamylene is greatly different from that of tetramethylsilane, so the isoamylene is removed through rectification, and finally the purified tetramethylsilane is obtained.

This invention relates to an adjustable multi-stage heat exchange jet-type mixed-works high-temperature heat pump system, belonging to the technical field of high-temperature heat pump systems. The mixed-works high-temperature heat pump system includes a mixed-works heat pump circulation loop and a gas-liquid jet-type water supply loop. The mixed-works heat pump circulation loop includes two compressors (low-pressure and high-pressure), a working fluid side for four condensers connected in series by two gas-liquid separators, a working fluid side for three evaporators, and two two-phase ejectors. The working fluid is a mixture of cis-1,3,3,3-tetrafluoropropylene and isopentane. The gas-liquid jet-type water supply loop includes gas-liquid ejectors, a water pump, and a water side for the three condensers. The mixed-works heat pump circulation loop and the gas-liquid jet-type water supply loop are coupled together. This invention utilizes two gas-liquid separators to form a four-stage condensation heat exchange, effectively improving energy utilization efficiency and reducing irreversible losses in the condensation process by at least 5%; by using two two-phase ejectors to pressurize and form three different pressure levels in the evaporators, irreversible losses in the evaporation process are reduced by at least 55%.

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.

Systems and methods for processing a mixed C5 stream from a cracker to produce a light fraction containing C1-C4 hydrocarbons, isopentane, and isopentene, and desulphurizing the light fraction to produce a substantially sulfur-free C5-rich product for use in a gasoline pool. A heavy fraction containing C5 + hydrocarbons, n-pentane, and cyclopentane compounds from the fractionated mixed C5 stream is recycled to the cracker.

The invention relates to the technical field of flame-retardant materials, in particular to a composite flame-retardant material containing p-nitrobenzyl alcohol and a preparation method of the composite flame-retardant material. The polyurethane foaming material is prepared from the following raw materials in parts by weight: 70 to 80 parts of polyether polyol, 15 to 20 parts of modified lignin, 50 to 60 parts of hexamethylene diisocyanate, 35 to 40 parts of diphenylmethane diisocyanate, 3.5 to 5 parts of loading filler, 2 to 3 parts of isopentane foaming agent, 1.5 to 2 parts of dibutyltin dilaurate and 0.5 to 1 part of water, according to the preparation method, graphene oxide is taken as a matrix, a metal organic framework containing a microporous and mesoporous structure is taken as a carrier, p-nitrobenzyl alcohol is loaded, and a phosphorus-containing flame-retardant group is grafted, so that the problem of insufficient flame-retardant property of polyurethane foam is greatly improved; meanwhile, the lignin is modified to introduce an ultraviolet absorption group, and participates in the reaction process of the polyurethane foam, so that the problem of precipitation of a small-molecule auxiliary agent is avoided.

The application discloses a kind of biodegradable quaternary copolymer foamed plastics and preparation method thereof, by following mass fraction component composition: carbon dioxide-based polyester-polycarbonate quaternary copolymer 88-95 parts, physical foaming agent 5-12 parts;The physical foaming agent is one or two of n-pentane or isopentane.Foaming agent n-pentane or isopentane in PPC-X The desorption rate is extremely low, can reach good storage effect, by kettle pressure foaming method, with n-pentane or isopentane as foaming agent, saturation temperature is 75 DEG C, adjust the saturation pressure of reaction kettle in 1.0MPa-5.0MPa, saturation time is 6h-24h, can obtain pentane adsorption amount greater than 7%, the PPC-X foamed particle of easy storage, when foaming in 60~80 DEG C hot water, PPC-X foamed bead with foaming ratio 10-40 can be easily obtained, and have uniform and dense cell structure, and the obtained PPC-X foam product is non-brittle foam, with good flexibility.

The invention relates to the field of fuel oil, and discloses aviation gasoline and a preparation method thereof. The preparation method of the aviation gasoline comprises the steps that alkylated gasoline is rectified, the alkylated gasoline with the distillation range of 35-125 DEG C is taken as a component A, the component A, a component B and an optional additive are mixed, and the weight ratio of the component A to the component B in the aviation gasoline is 2-9; the component B contains isopentane and cumene, and the weight ratio of the isopentane to the cumene is 0.5-2. The aviation gasoline provided by the invention meets various indexes such as octane number, vapor pressure, distillation range and the like, greatly reduces the use amount of tetraethyl lead, and is environment-friendly.

Unleaded aviation gasoline. An aviation gasoline fuel blend includes an unleaded aviation gasoline base fuel, with an effective amount of selected alkyl benzenes to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Suitable alkylated benzenes may include a mixture of xylene isomers. Aromatic amines, such as m-toluidine, may also be added to increase MON. Base fuels may be a high quality aviation alkylate, or may be a commercial iso-octane, or a mixture of high quality aviation alkylate enhanced by iso-octane, or by commercial iso-octane mixtures, and may include iso-pentane or butane or both iso-pentane and butane in sufficient quantity to provide appropriate vapor pressure for the final fuel blend.