9 results about "Sec-Butanol" patented technology

The invention discloses lithium-free high-heat-resistance ceramic pug and a preparation method thereof, and relates to the technical field of ceramic materials. When the lithium-free high-heat-resistance ceramic pug is prepared, aluminum oxide reacts with 3-(2, 3-epoxypropoxy) propyltrimethoxysilane to prepare pre-modified aluminum oxide; reacting the pre-modified aluminum oxide with starch to obtain modified aluminum oxide; mixing ethyl acetoacetate, isopropanol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide to prepare a spinning solution, performing electrostatic spinning, and then immersing the spinning solution into the yttrium oxide sol to prepare aluminum oxide-zirconium oxide-yttrium oxide composite fibers; stirring and mixing the modified aluminum oxide, talc, aluminum oxide-zirconium oxide-yttrium oxide fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water, and performing vacuum pugging to obtain the lithium-free high-heat-resistance ceramic pug. The lithium-free high-heat-resistance ceramic pug prepared by the invention has good thermal shock resistance and bending strength after being sintered.

The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.

The present invention relates to a comprehensive utilization method for by-product crude alcohol in MTO, including pretreatment: dehydrating the mixed by-products; catalytic hydrogenation: subjecting the dehydrated mixed by-products to catalytic hydrogenation; refining stage: rectifying and separating various products; hydrogen production stage: producing hydrogen by methanol reforming, a part of the obtained hydrogen is consumed in the catalytic hydrogenation reaction, and the other part is packaged and sold externally. This not only treats the by-products and avoids occupying the storage space in the factory area, but also can produce important chemical raw materials such as ethanol, isopropanol, and sec-butanol in addition to hydrogen, and can generate greater economic benefits.

Multi-carbon compounds such as ethanol, n-butanol, sec-butanol, isobutanol, tert-butanol, fatty (or aliphatic long chain) alcohols, fatty acid methyl esters, 2,3-butanediol and the like, are important industrial commodity chemicals with a variety of applications. The present invention provides metabolically engineered host microorganisms which metabolize methane (CH4) as their sole carbon source to produce multi-carbon compounds for use in fuels (e.g., bio-fuel, bio-diesel) and bio-based chemicals. Furthermore, use of the metabolically engineered host microorganisms of the invention (which utilize methane as the sole carbon source) mitigate current industry practices and methods of producing multi-carbon compounds from petroleum or petroleum-derived feedstocks, and ameliorate much of the ongoing depletion of arable food source “farmland” currently being diverted to grow bio-fuel feedstocks, and as such, improve the environmental footprint of future bio-fuel, bio-diesel and bio-based chemical compositions.

This invention discloses a highly efficient composite solubilizer for the hydration of butene to sec-butanol, belonging to the field of chemical process technology. Its composition includes: 0-60 parts of a polyether-based polymeric surfactant, 15-35 parts of a highly polar aprotic solvent, and 10-20 parts of a co-catalyst. The main solubilizing component of this invention disperses oily butene into extremely small droplets, allowing it to mix uniformly in water, thereby increasing the surface area for the reaction. The co-solvent, as the main component, provides a stable environment, ensuring that this highly mixed state is maintained for a certain period. The added additives, possessing both water and oil solubility, facilitate smoother dissolution of the mixture and help the reactants quickly contact the active sites of the catalyst. This accelerates the reaction rate of butene and water, significantly improving the efficiency of the one-time conversion to sec-butanol and greatly saving the large amount of energy required for material recycling.

The application provides a preparation method of o-sec-butyloxytoluene, comprising the following steps: performing catalytic reaction on o-cresol and sec-butanol under the action of a catalyst to obtain o-sec-butyloxytoluene; the catalyst comprises a carrier and at least two metal elements loaded on the carrier; the carrier comprises microporous molecular sieve and mesoporous molecular sieve. The o-sec-butyloxytoluene can be effectively prepared by using the preparation method, and the environment is friendly.

This invention discloses a butene hydration catalyst, its preparation method, and its applications. The butene hydration catalyst of this invention has the following structural formula: where n1 ranges from 200 to 500; R is an alkyl group. The preparation method of the butene hydration catalyst includes the following steps: modifying a sulfonated polymer with an alkylbenzene sulfonate in a solvent to obtain the butene hydration catalyst. The butene hydration catalyst of this invention exhibits both hydrophilic and lipophilic properties, promoting the contact between butene and water, improving the mass transfer efficiency between heterogeneous reactants in the reaction system, and thus enhancing the single-pass conversion rate of butene and the selectivity of the product sec-butanol. Furthermore, this invention also improves the butene hydration reaction process while preparing the butene hydration catalyst, further increasing the single-pass conversion rate of butene hydration to sec-butanol and reducing energy consumption and cost in the production process.

The invention relates to a preparation method of a spherical crystal of a tofacitinib citrate medicinal crystal form A. The method comprises the following steps: 1) adding tofacitinib citrate into a mixed solvent of water, one or more of n-butyl alcohol, sec-butyl alcohol, isobutyl alcohol and tert-butyl alcohol and one or more of methanol, ethanol, n-propyl alcohol and isopropyl alcohol; heating and dissolving; 2) after stirring and cooling, adding one or a mixture of more of ethyl formate, methyl acetate, ethyl acetate, isopropyl acetate, dichloromethane, n-heptane, n-hexane, isopropyl ether and methyl tert-butyl ether; and 3) continuously cooling and crystallizing to obtain the tofacitinib citrate crystal form A spherical crystal.

The present invention discloses a low-temperature preparation method of a flaky interlocking regular hexagonal α-Al2O3 powder, which is characterized in that it comprises the following steps: Step 1: Aluminum sec-butoxide or aluminum isopropoxide is mixed and stirred with n-butanol, and then a mineralizer is added to stir it and configure it to form A solution; Step 2: Deionized water, acetonitrile and n-butanol are mixed and configured to form B solution; Step 3: Solution B is slowly added dropwise to the A solution obtained in step 1 to obtain a milky white flocculent substance, and then filtered, dried, ground and sieved to obtain a precursor powder; Step 4: The precursor powder is calcined to prepare α-Al2O3 powder with a flaky interlocking regular hexagonal morphology. The present invention solves the problems of difficult preparation, complex process and high energy consumption of flaky alumina. The present invention is simple to operate, is conducive to large-scale production, and the prepared product can be applied to the fields of low-temperature sintering ceramics, pigments, cosmetics, automotive topcoats, toughened ceramics, etc.