38 results about "2-Methylpentane" patented technology

According to a process for production of alkylene oxide polymers offered by the present invention, an alkylene oxide is subjected to a polymerization reaction under presence of a catalyst in a solvent containing an aliphatic hydrocarbon having from five to seven carbon atoms and a branched structure. The aliphatic hydrocarbon is provided preferably by 2-methyl pentane, 3-methyl pentane, 2,3-dimethyl pentane, 2,4-dimethyl pentane, etc. The alkylene oxide is provided preferably by ethylene oxides and / or propylene oxides.

An amino alcohol derivative represented by the following general formula (1) (for example, (±)-2-amino-5-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]-2-methylpentane-1-ol) exhibits strong immunosuppressive effect while causing less side effects:

The multicomponent mixed work medium throttling refrigerating agent applicable to 200-240 k temp. zone includes four groups of substances, respectively are: first group includes tetrafluoromethane, nitrogen trifluoride or mixture; second group includes ethylene, ethane, fluoroform, xenon, fluromethane, perfluoroethylene, fluoroethylene, perfluoroethane or their any two, three and several kinds or mixture of all them; fourth group includes 1-butylene, isobutane, 2-methyl butane, 1-pentene, 3-methyl-1-butylene, 2-methylpentane, 2-butylene, cyclobutane, isobutylene, n-butane, pefluorobutane, n-pentane, perfluoropentane or their two, three, several kinds ormixture of all the them; and third group includees propylene, propane, perfluoropropane, 1,1,1-trifluoroethane, 1,1,-bifluoroethane.

The invention relates to a production method of a C5 enol. The production method uses isoprene and hydrogen chloride as raw materials and comprises the following steps: 1) performing addition reaction on isoprene and hydrogen chloride to generate a mixture of 1-chloro-isopentene and 3-chloro-isopentene; and 2) performing a hydrolysis reaction on the product of the addition reaction, adding one or more of toluene, ethylbenzene, n-hexane, cyclohexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane and heptane as the solvent in the hydrolysis process, separating out the oil phase product after the hydrolysis, and rectifying to obtain products, namely methylbutenol and 3-methyl-2-buten-1-ol. Compared with the C5 enol production process of the prior art, the side reaction, in which dichloro-isopentane is generated, in the addition reaction process is effectively inhibited; after the solvent is added in the hydrolysis reaction, the yield of the hydrolysis reaction can be increased and the purification of the product can be facilitated; the yields of the addition reaction and the hydrolysis reaction are both more than 98% and are obviously increased as compared with the prior art; and the production cost is greatly reduced.

The invention relates to a method and a device for separating n-hexane, isohexane and benzene. The device comprises a light component removal unit, an isohexane separation unit, an n-hexane extractive distillation unit, a first solvent recovery unit, a benzene extractive distillation unit, a second solvent recovery unit and a solvent regeneration unit. The method comprises the following steps: removing impurities with a boiling point less than the boiling point of 2-methylpentane in mixed hydrocarbon raw materials such as raffinate oil, pyrolysis gasoline or straight-run gasoline and the like from an aromatics extraction device firstly, and then separating an isohexane product; separating a n-hexane product from other materials by using an extractive distillation method; and removing n-hexane materials, and carrying out separation on the obtained product so as to obtain a benzene product. The main components of the isohexane product produced by using the technique disclosed by the invention are 2-methylpentane and 3-methylpentane, and the total mass fraction of 2-methylpentane and 3-methylpentane is not less than 95%; n-hexane meets the national standard GB16629-2008, and the mass fraction is not less than 99%; and the benzene product meets the national standard GB3405-89.

A novel carbinol gasoline fuel relates to an engine fuel, in particular to a novel liquid fuel for a gasoline engine. According to the weight parts, the novel carbinol gasoline fuel is mixed simply by the following raw materials of the composition: 20-80 of gasoline, 20-90 of carbinol, 2-10 of petroleum ether, 1-5 of 2-methylpentane, 0-5 of octane, 0-5 of isooctane, 0-5 of diethyl carbonate, 0-4 of cinnamene, 0.2-4 of trimethyl borate, 0-5 of dibutyl phosphite, 0.5-5 of dimethyl carbonate, 0-5 of methyl tertiary butyl ether, 0-4 of ether, 0-4 of isopropyl ether, 0-6 of acetone, 0-4 of isopropyl alcohol, 0-5 of isobutyl alcohol and 0-4 of anti-oxidant. The antiknock index is reinforced as the octane number is improved; and the compounding is optimized scientifically during the experiment and practice, thus leading the vehicle to keep the best stability on all aspects when the liquid fuel is in use.

The multicomponent mixed work medium throttling refrigerating agent applicable to medium-low temp. zone includes five groups of substances, the sum of their mole concentration is 100%, in which first group includes methane, krypton or mixture, total mole concentration is 5%-45%, second group includes tetrafluoromethane, nitrogen trifluoride or mixture, total mole concentration is 15%-55%; fourth group includes propylene, propane, perfluoropane, 1,1,1-trifluoroethane, 1,1-bifluoroethane, fluoroethane, propadiene, cyclopropane, or mixture, total mole concentration is 5%-25%; fifth group includes 1-butylene, isobutane, 2-methylbutane, 1-pentene, 3-methyl-1-butylene, 2-methylpentane, 2-butylene, isobutylene, n-butane, perfluorobutane, n-pentane or mixture, total mole concentration is 5%-25%.

The invention discloses a preparation method of C6-fluoroketone. C6-fluoroketone is called perfluoro-2-methyl-3-pentanone. The method includes the steps that in the presence of an organic guanidine catalyst and a solvent, perfluoro-2,3-epoxy-2-methylpentane reacts for 1-5 hours at the temperature of 0-80 DEG C; the organic guanidine catalyst is selected from one of or a mixture of two or more of metformin, bicyclic guanidine, chlorination bicyclic guanidine, tetramethyl guanidine and conjugated tetramethyl guanidine and other guanidyl compounds. The mole yield of the product obtained through the method is larger than 95%, reaction selectivity is high, reaction conditions are mild, and the preparation method is environmentally friendly.

The use of an additive as a clay-swelling inhibitor, especially in the field of drilling is described. More specifically, the use of 2-methylpentane-1,5-diamine or an organic or inorganic salt of 2-methylpentane-1,5-diamine as an inhibitor of the swelling of clays in an aqueous medium is described. Also described is a drilling fluid composition or hydraulic fracturing fluid composition including 2-methylpentane-1,5-diamine or an organic or inorganic salt thereof and drilling or hydraulic fracturing processes using the compositions.

Pharmaceutically active salts and esters of 1-dimethylamino-3-(3-methoxyphenyl)-2-methylpentan-3-ol and 3-(3-dimethylamino-1-ethyl-1-hydroxy-2-methylpropyl)-phenol, and methods of using the same for treating or inhibiting increased urinary urgency or urinary incontinence and / or pain.

The invention discloses an organic cleaning agent which comprises the following components by mass percent: 20-100% of 2-methylpentane, 0-10% of cyclohexane, 0-10% of 3-methylpentane, 0-10% of heptane, 0-80% of ethyl alcohol and 0-80% of dichloromethane. The organic cleaning agent provided by the invention is stronger in cleaning ability, is more safe and environment-friendly, is odorless, is low in harm to a human body and is capable of adjusting volatility.

The invention relates to a catalyst for converting methyl isobutyl ketone into 2-methylpentane and a preparation method of the catalyst. The catalyst is prepared from two parts, namely a sulfonic-acid-functional metal organic framework material MIL-101 (Al) and precious metal Pt, wherein the weight of the metal Pt is 0.5-5 weight percent in total weight percentage of the catalyst. The preparation method comprises the following steps: adding sodium fluoride into mixed liquor of aluminum nitrate nonahydrate, 2-sulfonic acid terephthalic acid monosodium salt and deionized water; after crystallization, using a hydrochloric acid solution for ion exchange; washing and drying to obtain the sulfonic-acid-functional metal organic framework material MIL-101 (Al); then dropwise adding a K2PtC16 solution to obtain a catalyst precursor, and reducing the catalyst precursor through hydrogen to obtain the catalyst. The catalyst has high catalytic activity and high alkane selectivity when being used for converting methyl isobutyl ketone into 2-methylpentane.

The invention provides a preparation method of chloroisopentene. According to the invention, one component, or a mixture containing two components or a mixture containing more than two components selected from the group consisting of toluene, ethylbenzene, hexane, cyclohexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, heptane and the like is used as a solvent; an addition reaction between isoprene and hydrogen chloride is carried out to generate chloroisopentene while the mass ratio of the solvent to isoprene is (0.2-10): 1; the mol ratio of isoprene to hydrogen chloride is 1: (0.5-1.0); the reaction temperature is minus 5-10 DEG C; the reaction pressure is normal pressure; and the reaction residence time is 2-10 hours. In comparison with the chloroisopentene production technology in the prior art, the preparation method provided by the invention has an advantage of simple technology and can be used to effectively prevent the generation of isoamyl dichloride during the addition reaction between hydrogen chloride and isoprene.

The invention relates to a wastewater treatment device, and discloses a printing and dyeing wastewater removal system comprising successively connected an oxygen tank, an ozone generator, a reactor and an absorption bottle. Organic matters with high relative contents in printing and dyeing wastewater final-settling pond effluent are acetophenone, chloroform and 2-chloro-2-methyl pentane, wherein the acetophenone accounts for 24.5% of total organic pollutants of the effluent. In the printing and dyeing wastewater removal system, the acetophenone removal rate is obviously increased, the ozone-activated carbon synergistic effect is increased, and the COD removal rate reaches up to 83.8%.

The invention provides an environment-friendly cleaning agent for an electronic industry. The environment-friendly cleaning agent is composed of the following components by weight: 45-70% of 2-methyl pentane, 15-25% of absolute ethyl alcohol, 5-10% of isopropanol and 10-20% of ether solvent. A primary solvent of the environment-friendly cleaning agent for the electronic industry is the 2-methyl pentane; a toxic property of the 2-methyl pentane on human bodies is one twentieth of normal hexane; the 2-methyl pentane has specially good dissolving capacity on rosin in scaling powder; the ether solvent has good dissolving capacity on polar materials such as organic acid in the scaling powder; and the absolute ethyl alcohol has good greasy dirt removing functions. The environment-friendly cleaning agent for the electronic industry does not contain halohydrocarbon such as the normal hexane and trichloroethylene, and has no environmental effect caused by ozone depletion. The environment-friendly cleaning agent for the electronic industry is basically nonhazardous to human bodies.

The multicomponent mixed work medium throttling refrigerating agent applicable to 200-240 k temp. zone includes four groups of substances, respectively are: first group includes tetrafluoromethane, nitrogen trifluoride or mixture; second group includes ethylene, ethane, fluoroform, xenon, fluromethane, perfluoroethylene, fluoroethylene, perfluoroethane or their any two, three and several kinds or mixture of all them; fourth group includes 1-butylene, isobutane, 2-methyl butane, 1-pentene, 3-methyl-1-butylene, 2-methylpentane, 2-butylene, cyclobutane, isobutylene, n-butane, pefluorobutane, n-pentane, perfluoropentane or their two, three, several kinds ormixture of all the them; and third group includees propylene, propane, perfluoropropane, 1,1,1-trifluoroethane, 1,1,-bifluoroethane.

The invention discloses a natural gas synergist and a preparation method thereof. The natural gas synergist is constituted by the following formula, and the formula comprises the following components in percentage by weight: 12.7% of 2-methylpentane, 41.775% of five-carbon cycloalkane, 10% of butane, 13% of 2-methylbutane, 16% of propane, 2.5% of isoheptane, 3.5% of cycloheptane, 0.5% of tetraethyl lead and 0.025% of pigment. The preparation method of the natural gas synergist comprises the following steps: mixing the 2-methylpentane, the five-carbon cycloalkane, the butane, the 2-methylbutane, the propane, the isoheptane and the cycloheptane according to the mixture ratio, then stirring for 2h, adding the tetraethyl lead and the pigment, sealing for 24h and controlling the temperature at about 30 DEG C to prepare the natural gas synergist. The natural gas synergist disclosed by the invention is non-toxic, and gas formed by mixing the natural gas synergist with natural gas has low explosion limit and has no black smoke, so that the harm to health of staff caused by suction of the black smoke and dust can be effectively reduced.

The multicomponent mixed work medium throttling refrigerating agent applicable to medium-low temp. zone includes five groups of substances, the sum of their mole concentration is 100%, in which first group includes methane, krypton or mixture, total mole concentration is 5%-45%, second group includes tetrafluoromethane, nitrogen trifluoride or mixture, total mole concentration is 15%-55%; fourth group includes propylene, propane, perfluoropane, 1,1,1-trifluoroethane, 1,1-bifluoroethane, fluoroethane, propadiene, cyclopropane, or mixture, total mole concentration is 5%-25%; fifth group includes 1-butylene, isobutane, 2-methylbutane, 1-pentene, 3-methyl-1-butylene, 2-methylpentane, 2-butylene, isobutylene, n-butane, perfluorobutane, n-pentane or mixture, total mole concentration is 5%-25%.

Compounds and methods for preparing substituted 3-(1-amino-2-methylpentane-3-yl)phenyl compounds from an isomerically pure starting material are described. In particular, methods of preparing a 3-(1-(dimethylamino)-2-methylpentane-3-yl)phenol as a substantially optically pure (R,R) stereoisomer are described. Using a method of the present invention, only the (R,R) and (S,S) stereoisomers of the target compound are produced, increasing the yield and stereoselectivity of the desired (R,R) stereoisomer.

The invention discloses a separating method of methyl isobutyl ketone synthesized by acetone, which is characterized by the following: increasing acetone extracting and recycling step based on four-tower flow path; recycling acetone in the 2-methyl pantane / acetone azeotropic material; reducing the consumption of acetone and manufacturing cost; improving product competitive power and economic benefit.

The invention relates to a quick-drying cleaning agent. The quick-drying cleaning agent comprises the raw materials of, by amount, 0.1% of butane, 2.23% of 4-pentene-2-alcohol, 7.52% of 2-methylpentane, 3.58% of heterogeneous heptane, 5.41% of methyl cyclopentane, 2.69% of 3,3-dimethyl pentane, 9.3% of 2-methyl hexane, 5.86% of 3-methyl hexane, 4.22% of isopropyl cyclobutane, 7.28% of n-heptane and the like. The quick-drying cleaning agent has the advantages of quick volatilization, no residue, no smell, stable performance, etc.. No watermarks and no residues are left on the surface of workpieces after the quick-drying cleaning agent is dried at a normal temperature. The quick-drying cleaning agent has toxicity to human body, does not destroy an ozone layer, and is convenient for operations. The ODP value (ozone depleting potential value) of the cleaning agent is zero.

The invention belongs to the technical field of fuel and particularly relates to high-efficiency and energy-saving alcohol based fuel. The high-efficiency and energy-saving alcohol based fuel is prepared from raw materials in parts by weight as follows: 68-92 parts of methyl alcohol, 16-34 parts of diesel oil, 0.7-1.9 parts of alkanolamide, 0.2-1.4 parts of p-tert-butylcatechol, 0.02-0.14 parts of N-ethylaniline, 0.3-1.5 parts of benzoic acid, 0.1-1.3 parts of 2-methylpentane, 0.01-0.07 parts of polyethylene glycol, 0.03-0.15 parts of isooctyl nitrate and 0.1-1.3 parts of a corrosion inhibitor. The high-efficiency and energy-saving alcohol based fuel is clean, anti-oxidant, combustion-supporting and corrosion-resistant, increases the cetane number, is good in combustion performance and high in combustion efficiency, realizes energy conservation and emission reduction, and reduces the cost.

The invention discloses a preparation method of C6-fluoroketone. C6-fluoroketone is called perfluoro-2-methyl-3-pentanone. The method includes the steps that in the presence of an organic guanidine catalyst and a solvent, perfluoro-2,3-epoxy-2-methylpentane reacts for 1-5 hours at the temperature of 0-80 DEG C; the organic guanidine catalyst is selected from one of or a mixture of two or more of metformin, bicyclic guanidine, chlorination bicyclic guanidine, tetramethyl guanidine and conjugated tetramethyl guanidine and other guanidyl compounds. The mole yield of the product obtained through the method is larger than 95%, reaction selectivity is high, reaction conditions are mild, and the preparation method is environmentally friendly.

The invention discloses an environmentally-friendly mechanical device antirust cleaning solution. The environmentally-friendly mechanical device antirust cleaning solution is prepared from 3.5-4.5 parts of triethanolamine oleate, 3.2-4.5 parts of dihydroxy acetic acid ether, 2.7-3.5 parts of glyceryl monostearate, 8.2-10.1 parts of glycerin, 5.3-6.2 parts of sodium silicate, 6-7 parts of 2-methylpentane, 3.2-4.3 parts of ethanol and 4-5 parts of a surfactant. The environmentally-friendly mechanical device antirust cleaning solution is economical, is friendly and harmless to the environment, can prevent surface corrosion of a device in the use process, can substitute manual secondary smearing rust proofing to improve the corrosion resistance of the surface of the mechanical device, is harmless to skins of enforcing personnel, and can quickly and thoroughly remove oil stains and dusts to ensure the reliable running of the mechanical device.

The invention discloses formwork cloth spray glue which is characterized by comprising, in weight percent, 25% of acetone, 20% of propane, 15% of 2-methylpentane, 5% of cyclohexane, 5% of 3-methylpentane, 2.5% of 2, 3-dimethylbutane, 2.5% of 2, 2-dimethylbutane, 0.1%-0.7% of hexane and 24.3-24.9% of synthetic resin. The formwork cloth spray glue has the advantages that the adhesive effect of formwork cloth and a formwork can be improved, the service life of a concrete component is prolonged, the formwork cloth is easily removed, and operating efficiency is improved.

The invention discloses an extraction agent and detection method for soluble substance content detection of an elastomer modified asphalt waterproof coiled material, and belongs to the technical fieldof building material detection. The extraction agent comprises ethylene glycol dimethyl ether and saturated alkane, the saturated alkane is one of n-hexane or 2-methylpentane, and the mass ratio of the ethylene glycol dimethyl ether to the saturated alkane is 1:(4-1); a mixed solvent of the ethylene glycol dimethyl ether and one of the n-hexane or the 2-methylpentane is adopted as the extractionagent instead of trichloroethylene, the experimental results and repeatability which are similar to the experimental results and repeatability of trichloroethylene are obtained, all components are non-toxic or low-toxic and environmentally friendlier, the extraction rate of a SBS modified material in the waterproof coiled material is high, and the extraction time is shortened effectively.

The invention discloses an environment-friendly type mechanical equipment antirust cleaning solution. The environment-friendly type mechanical equipment antirust cleaning solution comprises the following raw materials: 3.5-4.5 parts of triethanolamine oleate, 3.2-4.5 parts of dihydroxy acetic acid ether, 2.7-3.5 parts of monoglyceride stearate, 8.2-10.1 parts of glycerin, 5.3-6.2 parts of sodium silicate, 6-7 parts of 2-methylpentane, 3.2-4.3 parts of ethanol, and 4-5 parts of a surfactant. The environment-friendly type mechanical equipment antirust cleaning solution is economic and environment-friendly, is capable of preventing rust on the surface of the equipment during usage, and can substitute artificial secondary coating for resisting rust, corrosion-resistant capability of the mechanical equipment is increased, skin of implementers cannot be injured, oil stain and dust can be rapidly and thoroughly removed, and reliable operation of the mechanical equipment can be guaranteed.