244 results about "Methylcyclohexane" patented technology

A fuel composition comprises at least a tetramethylcyclohexane and a fuel component. The tetramethylcyclohexane can be used as a fuel component or as a fuel additive in the fuel composition. The fuel composition may further comprise a conventional fuel component selected from a petroleum-based fuel component such as diesel fuel, jet fuel, kerosene or gasoline; or a coal-based fuel component. Methods of making and using the fuel composition are also disclosed.

An aircraft window comprising a transparent pane meeting the Peak Heat Release Rate and the 2 min Heat Release requirements of OSU100/100 is disclosed. The pane comprise (co)polycarbonate and bromine-substituted oligocarbonate at weight ratio between said oligocarbonate to said (co)polycarbonate in the range of 0.1112 to 1. Excluded from the scope of the (co)polycarbonate resin of the invention is a copolycarbonate that contains more than 37 percent relative to its weight of residues of 1,1-bis-(4-hydroxy-phenyl)-3,3,5-trimethylcyclohexane.

A method for preparing ammonium tetrakis(pentafluorophenyl)borate salt comprising reacting a secondary amine with an aldehyde to form an iminium ion; hydrogenating the iminium ion by reaction with a reducing agent to form a tertiary amine; reacting the tertiary amine with a mineral acid to form an amine salt; and reacting the amine salt with K[B(C₆F₅)₄], Li[B(C₆F₅)₄], or combinations thereof to form an ammonium tetrakis(pentafluorophenyl)borate salt, wherein the secondary amine is derived from a non-animal source and the aldehyde has seven or more carbon atoms; wherein the ammonium tetrakis(pentafluorophenyl)borate salt is characterized by a solubility at 25° C. in hexane, cyclohexane or methylcyclohexane of at least 10 weight percent; and wherein the tertiary amine has a molecular weight of at least 450 g/mole is provided.

The invention discloses a headspace gas chromatography detection method of residual solvents in a macroporous resin extract, which can be used for simultaneously measuring normal hexane, benzene, methylbenzene, methylcyclohexane, dimethylbenzene, styrene and divinylbenzene in the macroporous resin extract. The method comprises the following steps of: (1) carrying out tests of chromatographic conditions and system suitability; (2) preparing a comparison product solution; (3) preparing a test product solution; and (4) measuring. The specificity, the system suitability, the linearity, the precision, the minimum detection limit, the recovery rate, and the like of the method all meet the requirements of drug quality standard analysis method verification and guiding principles in the first appendix of the Chinese pharmacopoeia (Version 2005).

Cyclic oligomers derivable from the copolymerization of isobutylene and isoprene can be hydrogenated to form 1-(2,2,4-trimethylpentyl)-2-isopropyl-3,3,5,5-tetramethylcyclohexane and related compounds, which are useful in lubricants such as a traction fluids.

The invention provides a ceramic surface material. The ceramic surface material comprises 20.0wt%-70.0wt% of organosilicone, 20.0wt%-70.0wt% of an organic solvent, 10wt%-50wt% of filler and 0.1wt%-3.0wt% of an auxiliary, wherein the organic solvent is selected from one or more of butyl acetate, dimethylbenzene, n-butyl ether, butyl carbitol acetate, hexahydrotoluene, normal octane and butyl titanate; and the filler consists of graphene, graphite, transition group metallic oxide, composite silicate, rare earth oxide, nonmetal and metal. The components in the ceramic surface material cooperatively interact, and the ceramic surface material has good overall performance when used as a coating.

The invention relates to a method for producing epoxypropane, in particular to a process for preparing epoxypropane by an organic peroxide method, with methylcyclohexane as an initial hydrocarbon. The method comprises the following three steps: 1. oxidizing methylcyclohexane in a liquid phase to obtain methyl cyclohexyl hydrogen peroxide; 2. subjecting the methyl cyclohexyl hydrogen peroxide to react with propylene to obtain epoxypropane and methylcyclohexanol; and 3. dehydrating and hydro-converting the methylcyclohexanol to methylcyclohexane, and returning to the first oxidation reaction step for recycling.

The invention discloses anti-abrasion and flame-retardant modified natural rubber which comprises the raw materials in parts by weight: 78-82 parts of natural rubber, 26-30 parts of butyl rubber, 12-15 parts of acrylonitrile-butadiene-styrene copolymer, 7-10 parts of jute fibers, 2-3 parts of 1,1-di(di-tert-peroxo)-3,3,5-trimethyl-cyclohexane, 0.5-0.8 part of sulfur, 1.1-1.4 parts of zinc acrylate copolymer, 14-17 parts of modified graphene, 26-29 parts of talcum powder, 27-30 parts of kieselguhr, 5-8 parts of high-abrasion-resistance carbon black, 32-35 parts of a flame-retardant system, 6-8 parts of trioctyl trimellitate TOTM, 6-9 parts of epoxy siberian cocklebur butyl oleate, 1.8-2.5 parts of an anti-ageing agent 2264 and 1.2-1.8 parts of an anti-ageing agent MBZ. The anti-abrasion and flame-retardant modified natural rubber is excellent in abrasion resistance, tearing resistance and flame retardancy, and is perfect in elasticity, ageing resistance and heat resistance performance.

The invention discloses a synthesis method of a sulfonylurea weedicide, which comprises the followings steps: adding a compound I, a compound II and a methylcyclohexane or methylbenzene reaction solvent to a reactor; reacting at 80-100 DEG C under reduced pressure, and meanwhile, continuously rectifying alcohol produced in the reaction; and after the reaction finishes, carrying out the heat filtering at 60-80 DEG C to obtain the sulfonylurea weedicide. Since the reaction and the rectification are carried out under reduced pressure, the temperature is reduced, and the secondary reactions are reduced; pyrilamine is easily dissolved in hot methylbenzene but has low solubility in cold methylbenzene, and the sulfonylurea weedicide has low solubility in methylbenzene. By the method, the reaction, the rectification and the heat filtering are carried out under reduced pressure to obtain the high-yield high-purity sulfonylurea weedicid, thereby reducing the cost.

The invention discloses a method for preparing N-ethyl-2-isopropyl-5-methycyclohexane, and belongs to the technical field of amide preparation. The method comprises the following steps: using mint alkyl chloride as a raw material and ethyl bromide as an initiator to firstly prepare chlorinated mint alkyl magnesium; then using trichloromethyl carbonate to prepare mint acyl chloride; and finally obtaining the N-ethyl-2-isopropyl-5-methycyclohexane through the aminolysis reaction of the mint acyl chloride and mono ethyl amine. The method has the advantages of simplicity, simple and convenient operation, mild reaction condition and low production cost; the yield of a product can reach about 80 percent; and the purity of the product reaches more than 99.2 percent. The product prepared by the method has intense cooling flavor effect and long taste retention time, and can be widely applied in the industries of food, medicine, cosmetics, tobacco, and the like.

The invention discloses a heat-resistant high flame-resistant fluororubber composite material. The heat-resistant high flame-resistant fluororubber composite material comprises following raw material: fluororubber, methyl vinyl phenyl polysiloxane rubber, polyvinylidene fluoride, polycaprolactone, EPDM, liquid butadiene-acrylonitrile rubber, a bulking agent, 2,4-dichlorobenzoyl peroxide, 1,1-Di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane, triallyl cyanurate, silicon carbide, magnesium hydroxide, gas phase white carbon black, expansible graphite, diatomite, boron nitride, molybdenum disulfide, pentaerythritol, hydrotalcite, trioctyl phosphate, dimethyl methylphosphonate, hydroxyl silicone oil, an anti-aging agent, an accelerant, and a silane coupling agent. The heat-resistant high flame-resistant fluororubber composite material possesses excellent heat resistance, aging resistance, and flame resistance, and long service life.

The invention discloses a composite solvent to prepare neoprene adhesive, which comprises the following parts: 130# solvent oil, dimethyl carbonate, butyl acetate or acetic ester, cyclohexyl-methane or cyclohexane, methyl ethyl ketone or pentanone. The solvent possesses aromatic smell and little toxicity, which improves adhesive strength.

The invention provides a ceramic surface material, which is prepared from 20.0 to 70.0 weight percent of organic silicon, 20.0 to 70.0 weight percent of organic solvents, 1.0 to 50 weight percent of filling materials and 0.1 to 3.0 weight percent of auxiliary agents, wherein the organic solvents are selected from one or several kinds of materials from butyl acetate, xylene, n-butyl ether, di-ethylenhje glycol mono butyl ether acetate, methylcyclohexane, normal octane and butyl titanate; the filling materials are prepared from graphene, graphite, transition metal oxide, compound silicate, rareearth oxides, nonmetal, nonmetal compounds, transition metal boride and metal. The ingredients in the ceramic surface material achieve the mutual cooperated effects, so that the better comprehensive performance is realized when the ceramic surface material is used as a coating.

The invention discloses a catalytic hydrogenation method by taking toluene as a hydrogen storing agent, which is characterized in that toluene and cyclohexane are taken as carriers, amorphous nickel is taken as a catalyst, and hydrogenation is catalyzing under the pressure of 5.0-7.0MPa and the temperature of 130-180 DEG C so as to generate methylcyclohexane used for storing hydrogen. Compared with the prior art, the method has the advantages of simple hydrogen storing equipment, large hydrogen storing quantity, low cost, cleanness and environmental protection, has high reversibility of hydrogen storing reaction, can realize the storage of releasing of hydrogen conveniently, and is safe in storage, transportation and maintenance, and high in reaction conversion rate; and hydrogen storage materials and the catalyst can be used repeatedly.

A refill for a correction pen which is excellent insolvent resistance and moldability and can make its content, i.e., a correction fluid having methyl cyclohexane as the main solvent and the remaining amount easily visible during usage and as time passes, is constructed of a molded article of a polyamide resin obtained from monomers having an aromatic ring or a naphthene ring, a molded article of a blend of two or more kinds of polyamide resins, or a molded article having a multi-layered structure of two or more layers whose innermost layer in contact with the correction fluid is constituted of a polyamide resin. The applying part of a refill unit mounted on a ballpoint type applicator having a pressurizing mechanism in linkage with clicking action is formed by press fitting the rear end of a ballpoint pen tip having a rotatable ball to the attachment portion at the front end of an ink reservoir and a metal tube is squeezed to cover the outer periphery of the attachment portion at the front end of the ink reservoir to which the tip is fitted.

Belonging to the field of organic peroxide preparation, the invention relates to a preparation method of 1, 1-bis(t-butyl peroxy)-3, 3, 5-trimethylcyclohexane. The method consists of: adding tert-butyl hydroperoxide and 3, 3, 5-trimethylcyclohexanone into a mixing kettle and conducting stirring, separating out a lower aqueous phase; adding sulfuric acid and a recycled mother solution into an acid preparation kettle, and performing stirring; adding a mixed solution of tert-butyl hydroperoxide and 3, 3, 5-trimethylcyclohexanone, and a sulfuric acid solution used for catalysis into a synthesis kettle, and stirring them; introducing a reaction product into a layering trough for layering, mixing a lower aqueous phase sulfuric acid-containing mother solution with sulfuric acid, and introducing an upper 1, 1-bis(t-butyl peroxy)-3, 3, 5-trimethylcyclohexane crude product into a post-treatment kettle; and subjecting the 1, 1-bis(t-butyl peroxy)-3, 3, 5-trimethylcyclohexane crude product in the post-treatment kettle to alkali washing, water scrubbing, drying and filtering, thus obtaining the finished product. The method has the advantages of: environmental protection, raw material saving, and preparation cost reduction.

The invention discloses a treatment and recycling process for production wastewater of 1,1-di-tert-butyl peroxide-3,3,5-trimethyl-cyclohexane (an initiator CH335). In the process, the production wastewater is collected directly from a drain outlet of a production device and is subjected to stabilized treatment, and after the danger of severe decomposition of organic peroxides in the wastewater due to heating is eliminated basically, tertiary butanol, tert-butyl peroxide and sulfuric acid are separated and recovered from the wastewater, wherein the recovered tertiary butanol, tert-butyl peroxide and sulfuric acid can be recycled repeatedly in the production process. Low-concentration wastewater is separated while chemical raw materials are recovered, and after the separated low-concentration wastewater is subjected to hydrolysis-contact oxidization and C-Fe micro-electrolysis decoloration, the major index of the drained wastewater meets the requirement on water pollutant emission limits of newly built enterprises in 'Discharge Standards of Water Pollutants for Chemical Synthesis Pharmaceutical Industry (GB21904-2008)'.

The invention discloses a high-abrasion resistance and high temperature-resistant cable sheath material, which is prepared from the following raw materials in parts by weight: 25 to 35 parts of modified phenolic resin, 25 to 35 parts of carboxylic-acrylonitrile-butadiene rubber, 30 to 50 parts of epichlorohydrin rubber, 0.8 to 1.4 parts of 1,1-bis-( tertiary butyl peroxide)-3,3,5-trimethyl-cyclohexane, 0.2 to 0.4 part of brimstone powder, 0.5 to 0.8 part of accelerator TMTM, 1.2 to 1.5 parts of accelerator CZ, 10 to 20 parts of magnesium oxide, 30 to 35 parts of furnace black, 20 to 30 parts of sea-foam stone powder, 10 to 20 parts of calcium metasilicate, 1 to 3 parts of trimellitic acid-3-(n-octyl n-decyl adipate), 4 to 5 parts of epoxy-cottonseed butyl oleate, 1 to 3 parts of antiager DFC-34 and 0.5 to 1.5 parts of antiager MBZ. The high-abrasion resistance and high temperature-resistant cable sheath material disclosed by the invention has excellent high temperature resistance and abrasion resistance and is high in stability and long in service life.

A method of recovering acrylic acid from a mixture comprising acrylic acid, water and acetic acid is disclosed, which includes: (a) extracting acrylic acid from the mixture with a solvent mixture comprising ethyl acrylate as the preponderant component thereof and an organic co-solvent selected from the group consisting of toluene, heptane, 1-heptene, methylcyclohexane, cycloheptane, cycloheptadiene, cycloheptatriene, 2,4-dimethyl-1,3 pentadiene, methylcyclohexene and methylenecyclohexene to form an extracted composition; and (b) azeotropically distilling the extracted composition to recover acrylic acid. Also disclosed is an alternate method of recovering acrylic acid which includes: (a) providing a feed stream containing acrylic acid, water, acetic acid, ethyl acrylate and an organic co-solvent selected from the group consisting of toluene, heptane, 1-heptene, methylcyclohexane, cycloheptane, cycloheptadiene, cycloheptatriene, 2,4-dimethyl-1,3 pentadiene, methylcyclohexene and methylenecyclohexene to a distillation column, wherein the weight ratio of ethyl acrylate to the organic co-solvent is from about 80:20 to about 95:5; and (b) azeotropically distilling said feed stream to provide an acrylic acid residue stream.

The invention relates to a production method of di(tert-butylperoxy)ketal, and mainly solves the problems of low product content, low yield, deep color and low production safety caused by violent side reaction in the previous technique. In the invention, R1 selected from cyclohexanone, 3,3,5-trimethylcyclohexanone or butyl levulinate and R2 tert-butyl hydroperoxide, which are used as raw materials, react in the presence of solvent at -20-40 DEG C under normal pressure for 0.5-10 hours to obtain the corresponding product 1,1-di(tert-butylperoxy)cyclohexane, 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexanone or 4,4,-di(tert-butylperoxy)-n-butyl valerate, wherein the mol ratio of R2 to R1 is (2-10):1, the weight ratio of solvent to R1 is (0.01-0.50):1, and the amount of the solvent accounts for 20-80% of the total weight of the reactants R1 and R2; and the catalyst is selected from at least one of sulfuric acid, phosphoric acid, hydrochloric acid, perchloric acid, p-methylbenzenesulfonic acid, nitric acid or acetic acid. The technical scheme provided by the invention solves the problems in the previous technique, and can be used for industrial production of di(tert-butylperoxy)ketal.