30 results about "Methylrhenium trioxide" patented technology

The invention relates to paper-tube adhesive and a preparation method thereof, which belongs to the technical field of adhesive. The paper-tube adhesive is prepared by mixing emulsion, oxidized lignin, potassium persulfate, ethylene glycol, kaolin powder, aluminum phosphate and water, heating, stirring to facilitate the reaction, cooling to room temperature, continuously stirring, and loading. The emulsion is prepared by heating and mixing water and polyvinyl alcohol, then cooling, adding emulsifier, plasticizer, defoaming agent and the like, continuously adding an initiator, heating, and stirring to facilitate the reaction; and the oxidized lignin is prepared by filtering papermaking black solution, heating and stirring filtrate and a sulfuric acid solution to facilitate the reaction, filtering, mixing filter residues and a sodium hydroxide solution, adding sodium periodate and methyltrioxorhenium, stirring to facilitate the reaction, finally standing, filtering and washing. The paper-tube adhesive is good in water resistance and capable of meeting the production requirement.

The invention discloses a supported organic rhenium catalyst using a high-activity zirconium phosphate stratified material as a support and a preparation method thereof, belonging to the technical field of catalyst preparation. The zirconium phosphate compound in stratified structure is used as a support, and methylrhenium trioxide with catalytic activity is anchored to the surface of the zirconium phosphate compound, thereby obtaining the supported organic rhenium catalyst. The catalyst is used for catalyzing olefins to synthesize epoxy compounds by epoxidation, and has the advantages of high reactant conversion rate and high product selectivity.

The invention provides a mercury-free catalyst with high catalytic activity for synthesizing vinyl chloride. The mercury-free catalyst is prepared from the raw materials of platinum, stannic chloride, cuprous chloride, methyltrioxorhenium, (1,5-cyclooctadiene)palladium dichloride(II), dibutyltin dilaurate and a carrier. The invention further provides a preparation method of the mercury-free catalyst. The mercury-free catalyst prepared by the method has high catalytic activity, and every gram of the mercury-free catalyst can be applied to catalysis to produce 1,80 to 1.85kg of vinyl chloride; in the prior art, every gram of low-mercury catalyst can be applied to catalysis to produce 1.25kg of vinyl chloride; the mercury-free catalyst prepared by the method is applied to a vinyl chloride synthetic reaction; as proved by chromatographic analysis, the purity of the vinyl chloride in an obtained crude product is 97.0 to 97.3 percent by volume, the yield of the vinyl chloride is 98.0 to 98.2 percent, and the selectivity of the vinyl chloride is 99.98 to 100 percent.

The invention discloses a method for catalytically depolymerizing lignin by using MTO (Methyltrioxorhenium) under a microwave promoted condition, and relates to a novel method for converting a lignin beta-O-4 model compound and a lignin raw material into a corresponding aromatic compound under a microwave irradiation condition by taking the MTO as a catalyst and ionic liquid as a reaction medium. The method comprises the following steps: adding the catalyst and a lignin oligomer in the ionic liquid, preheating and dissolving, feeding into a microwave reaction system, reacting for two minutes under the microwave irradiation condition, and efficiently and quickly depolymerizing the lignin, thus obtaining a monophenol compound. Compared with a traditional lignin depolymerization method, the method has the distinct characteristics that additional addition of a hydrogen source and an oxygen source is not required, the reaction condition is mild, the selectivity of monophenol products is high, the reaction speed is fast, and environment friendliness is realized. According to the method disclosed by the invention, a mild depolymerization strategy without consuming the hydrogen source is developed for preparation of aromatic chemicals by starting from a reproducible lignin resource, and meanwhile, a new path is developed for producing the aromatic compound through a non-petroleum route.

The invention discloses a method for preparing a pantoprazole sodium sulfone-nitrogen oxidized impurity. The method comprises the steps: enabling 2-chloromethyl-3,4-dimethoxy pyridine hydrochloride, which serves as a raw material, to react with 5-difluoromethoxy-2-mercapto-1H-benzimidazole so as to produce 5-difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridyl)methyl]sulfo}-1H-benzimidazole; then, oxidizing 5-difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridyl)methyl]sulfo}-1H-benzimidazole in the presence of hydrogen peroxide and acetic acid in a manner of using methyl rhenium trioxide as a catalyst, so as to produce a sulfone-nitrogen oxidized product of pantoprazole; and finally, forming a sodium salt by the sulfone-nitrogen oxidized product of pantoprazole and sodium hydroxide, thereby obtaining the pantoprazole sodium sulfone-nitrogen oxidized impurity. According to the method, the hydrogen peroxide-acetic acid system can oxidize a pyridine ring. The oxidizer methyl rhenium trioxide is adopted as the catalyst and can be complexed with hydrogen peroxide so as to produce peroxide of rhenium, oxygen in the peroxide of rhenium can be transferred to thioether needing oxidization, and thioether can be oxidized into sulfone through controlling the usage amount of the catalyst and the reaction temperature, so that the high-yield and high-purity product can be obtained.

The invention relates to an FCC (fluid catalytic cracking) gasoline oxidative desulfurization method based on a methylrhenium trioxide coupled ionic liquid. The technical scheme is as follows: mixing methylrhenium trioxide, an ionic liquid, oxydol and FCC gasoline, reacting at 30-70 DEG C for 0.5-2 hours, carrying out phase separation on the ionic liquid, and taking the oil phase. Compared with traditional extractive desulfurization and oxidative desulfurization methods, the FCC gasoline oxidative desulfurization method provide by the invention enhances the desulfurization effect from about 50% to more than 90%. The invention has the advantages of simple reaction system, environment friendliness, mild reaction conditions, simple equipment and the like, and the ionic liquid can be repeatedly regenerated and reutilized.

A composition for the degradation of plastic in the form of an additive used during the manufacturing of plastic. The composition being comprised of a predetermined amount of heptane, cellulose, methyl rhenium trioxide, butylated hydroxytoluene, and polyphenol oxidase. The additive can be selectively programmed to cause the plastic to begin disintegrating at a predetermined time.

The invention relates to a one-pot 5-HMF (5-hydroxymethylfurfural) preparation method based on an MTO (methyltrioxorhenium) composite catalyst. The method comprises steps as follows: an appropriate amount of MTO, a metal chlorine salt and an ionic liquid are taken and dissolved sufficiently at the temperature of 90-100 DEG C, the composite catalyst is prepared, an appropriate amount ofmicrocrystalline cellulose or lignocellulose is added, the mixture reacts for 10-60 min at the temperature of 110-150 DEG C, and the target product, namely, 5-HMF is obtained. 5-HMF is prepared with a one-step method through direct degradation of cellulose, the reaction process is simple, the yield of 5-HMF is higher, and the catalyst MTO is environment-friendly and free of environmental pollution.

The invention discloses an anode modifying material of a polymer solar battery and a modifying method and belongs to the technical field of polymer solar batteries. The polymer solar battery comprises a substrate, a transparent conductive metal oxide electrode layer, an anode modifying layer, a photoelectric active layer, a cathode modifying layer (or not provided) and a low work function cathode layer which are sequentially stacked, wherein the anode modifying layer is a methyltrioxorhenium membrane; the transparent conductive metal oxide electrode layer is prepared on the substrate and serves as an anode of the battery; a mixed solution of methyltrioxorhenium and solvent is rotationally coated on a transparent conductive anode and roasted to obtain the anode modifying layer; or the photoelectric active layer, the cathode modifying layer (or not provided) and the low work function cathode layer are prepared on the anode modifying layer sequentially to obtain the polymer solar battery. The methyltrioxorhenium membrane serves as the anode modifying layer, so cavity collection can be realized effectively, the work function of indium tin oxide (ITO) can be increased, and excellent performance is represented in the polymer solar battery.

The invention relates to a method for preparation of 5-hydroxymethylfurfural catalyzed by methyltrioxorhenium. By using an organic solvent as a reaction medium, using hexose or hexose-source biomass as a substrate and using 1-50% (relative to the mass of the biomass sugar source) methyltrioxorhenium as a catalyst, a reaction is carried out at 80-200 DEG C in an enclosed reaction kettle for 0.5-10h so as to efficiently produce HMF. The method of the invention has the following advantages: the reaction is rapid, HMF selectivity is high, the use of an acid catalyst is not involved, and the process is simple. The invention provides a new method for the preparation of HMF from renewable biological resources.

The invention provides a process for synthesizing methyltrioxorhenium from perrhenates, which comprises oxidizing rhenium metallic powder with nitric acid to obtain perrhenic acid, reacting with water-soluble metal salts to obtain silver perrhenate or potassium perrhenate or barium perrhenate, then reacting perrhenates with trimethylchlorosilan and tetramethylstannane to obtain MTO, finally carrying out post-treatment to obtain high purity MTO.

A composition for the degradation of plastic in the form of an additive used during the manufacturing of plastic is provided. The composition comprises a predetermined amount of heptane, cellulose, methyl rhenium trioxide, butylated hydroxytoluene, and polyphenol oxidase. The additive can be selectively programmed to cause the plastic to begin disintegrating at a predetermined time

The invention discloses high-purity hypochlorous acid hydrogel based on bionics and a preparation method, and belongs to the technical field of biomedical materials. According to the method, a generation mode of hypochlorous acid in human neutrophil is imitated, hydrogen peroxide, sodium chloride and hydrochloric acid with a certain concentration are used as raw materials, methylrhenium trioxide is used as a catalyst to prepare a high-purity hypochlorous acid solution, and meanwhile, the methylrhenium trioxide catalyst is recycled by adopting a reverse osmosis filter membrane filtration method. The hypochlorous acid hydrogel can be prepared by taking the high-purity hypochlorous acid water prepared by the method as a raw material, adding a gelling agent and taking alkaline electrolyzed water as a pH (Potential of Hydrogen) regulator. The hypochlorous acid water obtained by the invention is higher in purity and convenient to prepare, and the prepared hydrogel has an excellent antibacterial effect.

The invention discloses a method for preparing 2,4a,8,8-tetramethyloctahydrocyclopropa[d]naphthalen-3(1H)-one through catalysis of MTO, and belongs to the technical field of synthesis of fine organic chemicals. According to the method, under the action of an MTO catalyst, 3-methylpyrazole is used as an alkaline ligand, and thujopsene is subjected to an oxidation reaction to obtain 2,4a,8,8-tetramethyloctahydrocyclopropa[d]naphthalen-3(1H)-one. The MTO is used as the catalyst, so that the catalyst has good solubility and thermal stability and is green and environment-friendly; 3-methylpyrazole is used as an alkaline ligand, so that side reactions in the reaction are reduced, the selectivity of alkyl ketone is increased, and the yield of a target product is greatly improved; the prepared 2,4a,8,8-tetramethyloctahydrocyclopropa[d]naphthalen-3(1H)-one has sweet fragrance of costustoot and ambergris, is noble and lasting in fragrance and high in stability, has a very good industrial application prospect, and can be used in daily-use essence such as perfume, soap, cosmetic essence and the like.

The invention discloses a preparation method and system of bionic high-purity hypochlorous acid disinfectant fluid, and belongs to the technical field of disinfection. According to the method, a generation mode of hypochlorous acid in human neutrophil is imitated, hydrogen peroxide, sodium chloride and hydrochloric acid with a certain concentration are used as raw materials, methylrhenium trioxide is used as a catalyst to prepare a high-purity hypochlorous acid solution, and meanwhile, the methylrhenium trioxide catalyst is recycled by adopting a reverse osmosis filter membrane filtration method. The hypochlorous acid water obtained by the method is higher in purity, shorter in preparation time and lower in cost.

The invention relates to a novel method for producing an epothilone derivative using substituted pyridines and methyltrioxorhenium as catalysts.

The invention relates to a preparation method of moguisteine intermediate 17 beta-hydroxyl-4 alpha, 5 alpha-epoxy androstane (2,3-d) isoxazole, which includes the following steps: the moguisteine intermediate is obtained by oxidizing 17 beta-hydroxyl-4 androstane (2,3-d) isoxazole with epoxidation system (schiff base/MTO/H2O2) consisting of schiff base, methyltrioxorhenium and hydrogen peroxide. The prepared 17 beta-hydroxyl-4 alpha, 5 alpha-epoxy androstane (2,3-d) isoxazole is an important intermediate of a new anti-breast cancer medicine moguisteine. The preparation method overcomes the shortcomings in the prior art, and has the advantages of high epoxidation activity, high selectivity, little environmental pollution, high conversion rate and the like, thus having potential application value.