260 results about "Tetraisopropyl titanate" patented technology

The present invention discloses a method for producing a silane modified polyurethane sealant by using secondary amino alpha-silane, which belongs to the technical field of production of silane modified polyurethane sealants. The method comprises the following steps: removing water from polyether polyol, preparing polyurethane prepolymer, synthesizing silane-terminated polyurethane prepolymer and preparing the modified polyurethane sealant, wherein in the step of synthesizing the silane-terminated polyurethane prepolymer, the used silane for termination is formed by mixing one or two kinds of compounds selected from a group of secondary amino alpha-silane such as anilino-methyl-triethoxy silane, amine formic acid methyl trimethoxy silane or amine formic acid methyl methyl dimethoxy silane; in the step of preparing the modified polyurethane sealant, a catalyst used in the step is formed by mixing one or two kinds of compounds selected from a group of metal zirconate titanate compounds such as tetra-tert-butyl orthotitanate, tetraisopropyl titanate, tetrabutyl titanate and zirconium n-butoxide. The termination process of the prepolymer is simple, and the silane modified polyurethane sealant produced by the method has fast curing speed.

The invention provides a method for preparing (L)-pantoprazole sodium, which comprises the following steps of: oxidizing 5-difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridinyl)methyl]thio}-1H-benzimidazole by using 3,5-diisopropylbenzene hydroperoxide under the catalysis of a tetraisopropyl titanate, D-(-)-diethyl tartrate and N,N-diisopropylethylamine system to obtain S-(-)-5-difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridinyl)methyl]sulfinyl}-1H-benzimidazole, namely (L)-pantoprazole, refining the (L)-pantoprazole, and preparing a salt to obtain the (L)-pantoprazole sodium.

The invention provides a self-repairing compound titanium-based lubricating grease and a preparation method thereof, and relates to a lubricating grease and a preparation method of the lubricating grease. The lubricating grease has excellent antioxidant ability and bearing capacity, and is capable of repairing the surface of a wearing part and prolonging the service life of the friction part. The lubricating grease is prepared by mixing a base oil, a compound titanium soap thickening agent, an antioxidant additive, an anti-wear reagent at extreme pressure, an antifriction additive and a self-repairing lubricating material together; and the preparation method of the lubricating grease comprises the following steps of mixing the base oil with a high molecular acid and stirring, heating the temperature to the range of 80-90 DEG C, adding tetraisopropyl titanate and a low molecular acid, preserving heat and stirring, increasing the reaction temperature to the range of 120-150 DEG C, and then adding the left base oil and continuing increasing the temperature to the range from 200 to 220 DEG C and stirring; adding the self-repairing lubricating material after grease is formed, and stirring, and then adding other additives, and finally, grinding, homogenizing and degassing, thereby obtaining the self-repairing compound titanium-based lubricating grease. The self-repairing compound titanium-based lubricating grease is used for the automobile industry, the metallurgical industry, the food industry and the aircraft industry.

The invention relates to non-aromatic nucleus structure poly-hexahydrobenzene phthalic anhydride dihydric alcohol ester plasticizer and a preparation method thereof, belonging to the technical field of the synthesis of low molecular weight polyester compounds of fine chemicals. The invention is prepared by esterifying and polymerizing hexahydrobenzene with dihydric alcohol and n-butyl alcohol with the existing of homogeneous phase composite complex catalyst tetrabutyl titanate or tetraisopropyl titanate catalyst under 140-200 DEG C. The invention meets the requirements of energy conservation and cleaner production, and the prepared product of poly-hexahydrobenzene phthalic anhydride dihydric alcohol ester plasticizer is a novel polyester plasticizer with the characteristics of good compatibility with high polymer material and anti-migratory performance; the polyester plasticizer has the excellent characteristics of good resist-extraction performance, light color, good thermostability and fundamental innocuous performance; the invention is particularly suitable for environmental protection polyvinyl chloride (PVC) plastic product, medical plastic, refrigerator sealing strip, environmental protection PVC cable sheath and can be used as environmental protection assist agent of functional high polymer material for meeting the requirements of oil resistance and anti-migratory performance.

A nanometre-class TiSi molecular sieve for removing pollutants of heavy metals and radioactive substance from environment and purifying nuclein has a mole formular Na1+/-xTi1.5+/-ySi1+/-zO5, where x=0.01-0.2, y=0.1-0.5 and z=0.1-0.2. It is prepared from tetrabutyl titanate or tetraisopropyl titanate, ethyl n-silicate, sodium hydroxide and water jointly by the sol-gel method and the hydrothermal synthesis method. Its advantages are fine crystal grain, high reaction activity, low cost, high exchange capacity with radioactive elements and heavy metals, and high thermal stability and radioactive resistance.

The invention relates to a method for synthesizing and refining esomeprazole sodium. The method comprises the following several steps: (1) carrying out condensation by taking 2-sulfydryl-5-methoxybenzimidazole and 2-chloromethyl-3.5-dimethyl-4-methoxypyridine hydrochloride as raw materials to generate prochiral thioether; (2) synthesizing the prochiral thioether into an esomeprazole crude product under the action of D-(-) diethyl tartrate, water, tetraisopropyl titanate, diisopropylethylamine and cumene hydroperoxide, and refining to generate esomeprazole potassium salt; (3) dissolving the esomeprazole potassium salt, then transforming into esomeprazole sodium salt, and refining to obtain a final product. The process of the esomeprazole sodium has the advantages of easiness for operation, good reaction repeatability and higher yield; the obtained product is high in purity and suitable for industrialized production.

The invention discloses a preparation method of diethylene glycol dibenzoate. Benzoic acid and diethylene glycol are used as raw materials, and a composite catalyst employed is a mixture of tetraisopropyl titanate and a solid titanium base compound. The method comprises steps of: adding by weight 66.5-68.5 parts of benzoic acid and 31.5-33.5 parts of diethylene glycol in a reaction kettle; heating; after complete dissolving of benzoic acid, adding 0.05-0.08 part of the composite catalyst; insulating at a temperature of 190-210 DEG C for 4-6 h to achieve complete reaction; after the reaction, removing alcohol by reducing temperature and pressure to obtain crude diethylene glycol dibenzoate; adding 0.1-0.15 part of diatomite and 0.1-0.15 part of activated carbon; and decolorizing and filtering to obtain the diethylene glycol dibenzoate finished product. The preparation method provided by the invention has characteristics of safe and stable technical operation, low cost, no environmental pollution, short reaction time and high yield of finished product.

The invention discloses a weather-resistant power pipe. The weather-resistant power pipe is prepared from the following raw materials in parts by weight: 100-150 parts of polypropylene, 5-10 parts of light calcium carbonate, 1-8 parts of flaky talcum powder, 2-10 parts of calcined kaolin, 1-5 parts of brucite powder, 20-40 parts of modified silica fume, 0.2-3 parts of colorant, 2-10 parts of novel nucleating agent, 1-2.7 parts of antioxidant, 0.5-3 parts of polytetrafluoroethylene, 2-12 parts of toughening master batch, 5-20 parts of melamine cyanurate and 5-15 parts of modified crystal whisker; the preparation process of the novel nucleating agent comprises adding 150-180 parts of p-tert-butyl benzoic acid to 200-300ml of tetraisopropyl titanate, reacting at 90-130 DEG C for 3-5 hours and then adding 100-150ml of silicate ester to obtain a solution A, adding the solution A to an ethanol-water mixture, hydrolyzing at 50-65 DEG C for 3-5 hours, filtering and drying, thereby obtaining the novel nucleating agent. The weather-resistant power pipe is high in shock resistance, aging resistance, cold tolerance and thermal resistance.

The invention discloses a method for preparing a titanium dioxide porous material. The method comprises the following steps: weighing titanate, a hydrolyst, distilled water and a solvent according to a mass ratio of (3-4):(2-5):(1-3):(2-4), mixing and stirring the above four substances, putting into a polytetrafluoroethylene high-pressure reaction kettle, uniformly grinding activated carbon by using an agate mortar, adding obtained activated carbon powder into the reaction kettle, acutely and uniformly stirring so as to obtain gel, putting the reaction kettle into an oven of 150-180 DEG C for 3-8 hours, drying the obtained gel in a drying oven, roasting the dried gel at 500-600 DEG C for 3-6 hours so as to remove an activated carbon template, thereby obtaining the titanium dioxide porous material, wherein the titanate is tetraethyl titanate, tetrapropylorthotitanate, isopropyl titanate or tetra-n-butyl titanate; the solvent is absolute ethyl alcohol, absolute methanol, isopropanol or n-butyl alcohol; the hydrolyst is a mixed liquid of hydrochloric acid and sulfuric acid in a mass ratio of (3-5):(2-3). The raw materials of titanium dioxide prepared by using the method are cheap in price, the preparation process is simple, the titanium dioxide crystal form is mainly anatase, and photocatalytic performance which is relatively good when being compared with the photocatalytic performance of P25 commercial titanium dioxide is achieved.

The invention discloses a nano conveyor belt which consists of tyre fabrics or canvas and a high polymer composite material covered on the fabrics or the canvas, wherein the high polymer composite material comprises the following raw materials in parts by weight: 20-40 parts of chloroprene rubber, 5-10 parts of nitrile rubber, 5-10 parts of natural rubber, 5-15 parts of polyvinyl chloride, 10-20 parts of diocty phthalate, 2-5 parts of chlorinated paraffin, 2-5 parts of antimonous oxide, 2-5 parts of tritolyl phosphate, 0.1-0.3 part of tetraisopropyl titanate, 0.1-0.5 parts of hydroquinone dibenzyl ether, 0.1-0.5 parts of tetramethylthiuram disulfide, 0.3-0.6 part of sulphur, 2-5 parts of carbon black and 1-3.6 parts of nano particles. The nano conveyor belt prepared of the invention is characterized in that the surface resistivity is 1.5*105 omega, and the body resistivity is 3.0*1.3 omega.m; the combustion time is 1.3 second, and the smoldering time is 0 second; and after the nano conveyor belt is soaked in water for 70 hours, the antistatic performance and flame resistance thereof have no obvious change.

The invention belongs to the technical field of a method for preparing Rivastigmine intermediate. As is shown above, the Rivastigmine intermediate is obtained by causing the following formula to react with chiral amine under catalysis of tetraisopropyl titanate and then carrying out catalytic hydrogenation. In the method, 3-((S)-1- ((S)-1-phenethylamine group) ethide) phenylethyl (methyl) carbamate is obtained under the catalysis of the tetraisopropyl titanate. As the price of the tetraisopropyl titanate is 10% of the price of the currently used ytterbium acetate, the cost advantage is obvious. In addition, the method has the advantages of simple operation, low cost and high purity and yield of the obtained isomer. By adopting the intermediate to synthesize the Rivastigmine, the reaction route is short and the yield is high; the intermediate is the key intermediate for synthesizing the Rivastigmine.

The invention belongs to the technical field of material preparation processing, and concretely relates to a controllable nanocrystalline TiO2 particle, and a preparation method and a use thereof. A technical problem to be solved in the invention is to provide the preparation method of the controllable nanocrystalline TiO2 particle. The method comprises the following steps: 1, adding tetraisopropyl titanate into an acidic solution, and stirring and reacting to prepare a titanium sol; 2, carrying out a hydrothermal reaction on the titanium sol; and 3, removing the above obtained liquid phase after the hydrothermal reaction ends, washing until neutrality, and drying to prepare the nanocrystalline TiO2 particle. TiO2 particles with different morphologies, sizes and crystal forms can be prepared through the method as needed.

The invention relates to a microwave liquid phase compounding process of high-purity barium titanate powder. Main raw materials which are tetraisopropyl titanate or tetrabutyl titanate, barium octahydrate and nitric acid are compounded by microwave auxiliary heating at lower temperature for shorter reaction time to obtain the barium titanate powder in different grain diameter specifications. The process comprises the following concrete steps: (1) hydrolyzing a titanium resource; (2) washing a hydrolyzed product; (3) obtaining the titanium resource; (4) fully dissolving high-purity Ba(OH)2.8H2Oin the pure water in a microwave reaction vessel with a stirring system to obtain barium hydroxide solution; (5) carrying out compounding reaction and obtaining slurry containing barium titanate particles after the reaction; (6) precipitating and washing or filtering the barium titanate slurry obtained in the reaction with high-purity water for many times and then drying to obtain the high-puritycubic phase barium titanate powder. The process has low reaction temperature, short reaction time, controllable particle diameter and high product purity.

The invention discloses an anti-aging MPP (modified polypropylene) electric tube which is prepared from the following raw materials in parts by weight: 100-150 parts of polypropylene, 5-10 parts of light calcium carbonate, 1-8 parts of flake talcum powder, 2-10 parts of calcined kaolin, 1-5 parts of brucite powder, 20-40 parts of modified micro silicon powder, 0.2-3 parts of colorant, 2-10 parts of novel nucleating agent, 1-2.7 parts of antioxidant, 0.5-3 parts of polytetrafluoroethylene, 2-12 parts of master batch, 5-20 parts of melamine cyanurate and 5-15 parts of modified crystal whisker. The preparation process of the novel nucleating agent comprises the following steps: adding 150-180 parts of p-tert-butyl benzoic acid into 200-300ml of tetraisopropyl titanate, reacting at 90-130 DEG C for 3-5 hours, adding 100-150ml of silicate to obtain a solution A, adding the solution A into an ethanol-water mixture, hydrolyzing at 50-65 DEG C for 3-5 hours, filtering, and drying to obtain the novel nucleating agent. The anti-aging MPP electric tube has the advantages of high aging resistance, excellent impact resistance, excellent freezing resistance and excellent heat resistance.

A novel preparation method of a SrTiO3/Cu2O junction composite nanomaterial comprises the following steps: dissolving titanium isopropoxide (tetraisopropyl titanate) and strontium chloride hexahydratewith acid, performing mixing, regulating pH to 3-4, heating up to 90 DEG C, and preserving the temperature for 3 h; then heating up to 400-500 DEG C, and preserving the temperature for 4-6 h; obtaining a SrTiO3 catalyst; at 35 DEG C, stirring copper acetate dihydrate to be dissolved in glycol methyl ether, performing stirring, performing ultrasonic treatment for 60 min, then adding a SrTiO3 catalyst, performing stirring, adding a sodium hydroxide solution, regulating pH to be 10-14, and performing stirring for 10 min at 50 DEG C; adding enough dextrose solution, and performing a reaction for1-1,5 h; and cooling to the room temperature, and performing centrifugal separation to obtain a solid precipitate which is the rTiO3/Cu2O junction composite nanomaterial. In a SrTiO3/Cu2O heterojunction composite catalyst, SrTiO3 and Cu2O form heterojunctions to facilitate application to electronics and holes. The heterojunction composite catalyst degrades organic dye wastewater under visible light, and particularly, the photocatalytic degradation efficiency of a methylene blue organic solution reaches 92%.

The invention provides a method for preparing nano TiO2 (titanium dioxide) pastes, and is characterized by comprising the following steps in percentage by weight: adding one part of tetraisopropyl titanate to 2-6 parts of ethylene glycol; heating the mixed solution to 90 DEG C; adding 2-4 parts of citric acid; stirring for 6-24 hours magnetically to form TiO2 sols; adding 2-4 parts of P25 powdersand 0.2-0.8 part of pore forming material; and mixing and grinding to prepare the pastes. The method has the advantage of low sintering temperature and is convenient to package a battery.

The invention discloses a preparation method of modified expanded polystyrene. The preparation method of the modified expanded polystyrene comprises the following steps: adding di(dioctyl phosphite) tetraisopropyl titanate into acetone, uniformly stirring, then adding carbon nano tubes for carrying out ultrasonic dispersion, and drying to obtain a nucleating agent; adding water, barium stearate, activated calcium phosphate, nekal, a defoaming agent, an antioxidant, a flame retardant and styrene into a reaction container, uniformly stirring, then sequentially adding dibenzoyl peroxide, tert-butyl peroxybenzoate, dicumyl peroxide and the nucleating agent, uniformly stirring, heating up to the temperature of 90 DEG C, and carrying out heat preservation for 3-4 hours, so that polystyrene is obtained; adding liquid butadiene-acrylonitrile rubber and melamine formaldehyde resin into a reaction container containing polystyrene, heating up to the temperature of 100-110 DEG C, uniformly stirring, adding a foaming agent, and carrying out heat preservation for 3-4 hours, wherein pressure in a heat preservation process is 1-1.2MPa; and cooling to room temperature, and filtering, so that the modified expanded polystyrene is obtained.