50 results about "Oxidizing agent" patented technology

An electrically controlled propellant comprising an ionomer oxidizer polymer binder, an oxidizer mix including at least one oxidizer salt and at least one eutectic material, and a mobile phase comprising at least one ionic liquid is disclosed. The PVAN polymer in the present invention may be of medium (>100,000) to high molecular weight (<1,000,000). The present invention also may include the controlled cross-linking of the polymer using epoxy resins, the use of moisture barrier coating, the addition of an energetic combustion additives such as Chromium III and polyethylene glycol polymer.

A gas generating process, which is for the continuous production of energy and hydrogen for rocket and other propulsion and is also for the continuous production of hydrogen, utilizes the reaction of metallic materials, particularly aluminum, with organic materials, particularly hydrocarbons provided as jet fuel, and with water or an oxidizer which is predominantly water. In comparison with related reactions, the reaction produces hot gases containing more hydrogen and the products have a lower temperature for the same specific impulse. The process incorporates organic liquids with metallic powders to produce desirable, lower molecular weight exhaust gas products; and the increased hydrogen is desirable for use with a fuel cell and in connection with propulsion of a super-cavitating underwater device. The process is advantageous in that a metal, in powdered form, and a hydrocarbon liquid may be provided together as a slurry or gel for effective metering. The metallic material may also be provided with the organic material in the form of a binder as used in solid propellants, and the organic material and water may be provided together in the form of a water containing liquid monopropellant. The hydrogen containing product gases from the reaction may be further reacted with suitable oxidizers for production of additional energy or steam. The reaction is particularly useful for underwater vehicles where ambient water is available and the reaction products may be used for propulsion.

A slurry composition for chemical mechanical polishing (CMP) of a phase-change memory device is provided. The slurry composition comprises deionized water, a nitrogenous compound, and optionally abrasive particles, an oxidizing agent, or a combination thereof. The slurry composition can polish a phase-change memory device at a high rate, can achieve high polishing selectivity between a phase-change memory material and a polish stop layer (e.g., a silicon oxide film), and can minimize the occurrence of processing imperfections (e.g., dishing and erosion) to provide a high-quality polished surface. Further provided is a method for polishing a phase-change memory device using the slurry composition.

A solar cell and a fabricating method thereof are provided. In the method of fabricating the solar cell, a p-type semiconductor substrate on whose light-receiving surface an anti-reflection coating is formed is loaded into a processing chamber. In this case, the p-type semiconductor substrate may be loaded on a substrate support of an apparatus of processing a plurality of substrates along the circumference of the substrate support, in the state where the back surface of the p-type semiconductor substrate faces upward. Then, a back surface field (BSF) layer having the characteristic of Negative Fixed Charge (NFC) is formed with AlO, AlN or ALON on the back surface of the p-type semiconductor substrate. At this time, the BSF layer may be formed by simultaneously injecting an Al source gas, a first purge gas, an oxidizing agent gas and/or a ntiriding agent gas, and a second purge gas through injection holes of individual gas injection units while relatively rotating the substrate support with respect to the shower head. Thereafter, a back surface electrode is formed on the BSF layer such that the back surface electrode is electrically connected to the BSF layer.

The invention discloses a trivalent copper catalyst and a preparation method thereof and application to hydrochlorination of acetylene. The preparation method of the trivalent copper catalyst comprises the steps that a nitrogen-containing heterocyclic compound and copper salt are added into a trichloromethane solution to mix to obtain a mixed solution A containing a bivalent copper compound; ionicliquid is added into the obtained mixed solution A, and under the action of an oxidant, a mixed solution B containing a trivalent copper compound is obtained; and a porous solid carrier is immersed in the obtained mixed solution B containing the trivalent copper compound for 0.5-5 h, then the treated solid is taken out, and heated and dried under the condition of blue light irradiation, and the trivalent copper catalyst is obtained. The trivalent copper catalyst is used for the reaction of acetylene hydrochlorination to prepare vinyl chloride. The trivalent copper catalyst is prepared by simple operation steps, the stability and activity of the catalyst are improved, the production cost is lowered, and good application prospect is achieved.

A basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 μm; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Also, a gas generating composition which has a low toxicity, a high burning rate, and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, and (c) a binder and/or a slag-forming agent.

The invention includes inserting an object to be processed into a processing vessel, which can be maintained vacuum, and making the processing vessel vacuum; performing a sequence of forming a ZrO₂ film on a substrate by alternately supplying zirconium source and an oxidizer into the processing vessel for a plurality of times and a sequence of forming SiO₂ film on the substrate by alternately supplying silicon source and an oxidizer into the processing vessel for one or more times, wherein the number of times of performing each of the sequences is adjusted such that Si concentration of the films is from about 1 atm % to about 4 atm %; and forming a zirconia-based film having a predetermined thickness by performing the film forming sequences for one or more cycles, wherein one cycle indicates that each of the ZrO₂ film forming sequences and the SiO₂ film forming sequences are repeated for the adjusted number of times of performances.

The invention belongs to medicine chemical synthesis field, especially relates to method for synthesizing 16- dehydrogenating pregnene acyloin acetic ester and medicine intermediate of the same kind with steroid saponin. The pseudosapogenin cracked from steroid saponin reacts with oxygen under existence of light and sensitizer, or with catalyst pyridine and acetic anhydride, and product is acidolysized directly to get final product. The invention is characterized by elimination of chromic anhydride pollution used as oxidant, irrigid temperature control, simple post treatment process, and increased productivity.

The invention discloses a mussel-imitated underwater high-viscosity hydrogel preparation method, which comprises: (1) dissolving chitosan in acetic acid to prepare a chitosan acetic acid solution; (2)adding 3,4-dihydroxyphenylacetic acid, EDC and NHS into the solution prepared in the step (1), adjusting the pH value, and carrying out a reaction for a certain time; (3) dialyzing the solution obtained in the step (2) in water with the pH value of 5, taking the trapped fluid, and carrying out freeze-drying; (4) preparing the sample obtained in the step (3) into a solution; (5) dissolving glucanin water, adding an oxidant, reacting for a certain time in a dark place, and then adding ethylene glycol to terminate the reaction; (6) dialyzing the solution obtained in the step (5) in water, taking the trapped fluid, and carrying out freeze-drying; (7) preparing the sample obtained in the step (6) into a solution; and (8) mixing the solutions obtained in the step (4) and the step (7) to obtainthe hydrogel. According to the preparation method provided by the invention, the prepared hydrogel can be used as an underwater adhesive.

The invention discloses a polypyrrole/nanometer platinum composite conductive fiber and a preparation method thereof. The method comprises the following steps of: performing treatment such as proper cleaning and the like on a fiber, soaking in an oxidant solution for 10 to 30 minutes, air-drying at room temperature or drying, putting the treated fiber into a sealed container filled with pyrrole steam, reacting at the temperature of between 0 and 30 DEG C for 5 to 30 minutes, respectively washing by using ethanol and deionized water, and air-drying or drying to obtain a conductive fiber A; and soaking the conductive fiber A in a chloroplatinic acid (H2PtCl6.6H2O) aqueous solution at the concentration of 0.1 to 1.0mol/L for 0.5 to 2 hours, dipping in pyrrole aqueous solution at the concentration of 0.01 to 0.1mol/L, reacting at room temperature for 6 to 10 hours, respectively washing by using ethanol and deionized water, and air-drying or drying to obtain the polypyrrole/nanometer platinum composite conductive fiber. The conductive fiber can be directly used for weaving and also can be blended with a common fiber in a ratio of 1:10-100 to prepare a fabric with an antistatic function and an electromagnetic screen function. The specific resistance of the polypyrrole/nanometer platinum composite conductive fiber is 103 to 107 omega.cm; and the polypyrrole/nanometer platinum composite conductive fiber has the antistatic function and the electromagnetic screen function.

Cross-linked ampholytic polymers that may be used as rheological modifiers, and/or absorbent gelling materials are disclosed. The polymers may be storage stable in aqueous compositions comprising soluble salt, and/or an oxidizer, such as hydrogen peroxide.

The invention relates to a fluorocarbon surfactant and a preparation method thereof, which reacts 10-50 parts by weight of perfluoroalkyl sulfonyl fluoride, 5-45 parts by weight of amine and 20-25 parts by weight of solvent at the temperature of ranging from 20 DEG C to 110 DEG C for 2 through 12 hours to acquire an intermediate product; mixing well the intermediate product with 10-30 parts by weight of an oxidant and stirring the mixture for reaction at the temperature of ranging from 20 DEG C to 80 DEG C for a plurality of hours; adding 0.1-2.5 parts by weight of an accessory ingredient and mixing well after the reaction is finished; in this way, the product is acquired when the filtrated product is stirred and mixed with 5-30 parts by weight of a de-ionized water at the temperature of ranging from 0 DEG C to 50 DEG C. Compared with the prior art, the product prepared by the invention is of short technical process of preparation, simple operation, high reaction efficiency, low production cost and is characterized by high surface activity, high thermal stability and high chemical stability. The surface tension of a water solution of 0.01 percent is lower than 16dyn/m, and the CMC value is lower.

The instant disclosure relates to hair coloring base compositions and developer compositions that can be incorporated into a hair color cartridge, which combines the compositions and dispenses them onto hair. The hair color cartridge includes: (a) one or more hair coloring base compositions and; (b) one or more developer compositions, which can be combined to form an active hair coloring composition and dispensed onto hair. The hair coloring base compositions typically include one or more oxidative dye precursors; one or more alkalizing agents; one or more reducing agents; optionally, one or more cationic conditioning polymers; one or more surfactants; one or more water-soluble solvents; and water. The developer compositions typically include one or more oxidizing agents; one or more surfactants; and water. The unique components and fluid characteristics of the various compositions are such that devices or appliances comprising them accurately combine and dispense the hair coloring base composition(s) with the developer composition(s) in a predetermined ratio with excellent consistency for application to hair.

A process for the separation of a protonated organic hydroxylamine compound and an organic nitrosonium compound from each other under acidic conditions, wherein a mixture of protonated organic hydroxylamine compound and organic nitrosonium compound is brought in contact with a hydrophobic resin to retain the organic hydroxylamine compound on the hydrophobic resin. A process for the oxidation of a hydroxy compound in the presence of an organic nitroxy compound and optionally a primary oxidant, using this separation process is also disclosed.

The invention discloses an additive-free odorless acrylate emulsion with super stain resistance. The emulsion is prepared from the following raw materials in parts by weight: 100-160 parts of water, 10 to 15 parts of methyl methacrylate; 20-30 parts of styrene, 40 to 55 parts of butyl methacrylate, 30 to 45 parts of tert-butyl acrylate, 1 to 6 parts of methacrylic acid, 0.5 to 2 parts of trifluoro-ethyl acrylate, 2 to 10 parts of a functional monomer, 2 to 10 parts of an emulsifier, 0.1 to 0.5 part of persulfate, 0.1 to 0.5 part of an oxidant, 0.1 to 0.5 part of a reducing agent and 2 to 10 parts of a pH regulator. When the acrylate emulsion is used for a coating, an anti-freezing agent does not need to be added, and the acrylate emulsion has the advantages of super stain resistance, low odor, environmental friendliness and the like.

The invention provides a sucralose-6-ester purification method, which comprises: adding an oxidizing agent to a mother solution to be purified, carrying out an oxidation reaction under a first preset condition, adding an alkaline hydrolysis agent, and carrying out an alkaline hydrolysis reaction under a second preset condition to convert target impurities into sucralose-6-ester so as to obtain an oxidation alkaline hydrolysis reaction solution, adjusting the pH value of the oxidation alkaline hydrolysis reaction liquid to be neutral, keeping for a period of time, then heating and filtering to remove insoluble impurities, and then separating liquid to obtain a first water phase and a first organic phase; extracting the first water phase by adopting an extracting agent, and combining a second organic phase obtained by extraction with the first organic phase to obtain mother liquor to be crystallized; and a crystallization step: concentrating the mother liquor to be crystallized, and crystallizing under a third preset condition to obtain a sucralose-6-ester crude product and a first filtrate. According to the method, the impurity content is effectively reduced, and meanwhile, the yield of a target product is greatly improved.

The invention discloses a method for producing a rubber vulcanization accelerant DZ by a solvent method. With methanol as a solvent, hydrogen peroxide as an oxidant and an M-Na salt as raw material, the method is characterized by comprising the steps: adding 50 g of a 24% sulfuric acid into a reactor containing 43 g of dicyclohexylamine and 200-800 ml of methanol, under conditions of the temperature of 30-60 DEG C and the rotating speed of 800 rpm, fully undergoing a reaction of sulfuric acid with dicyclohexylamine, then dropwise adding 98 g of the M-Na salt, next adding the oxidant hydrogen peroxide with the content of 8-12% at the flowing speed of 5 ml/min, at the same time, controlling the pH of the reaction solution to 8-11 and the dropwise adding time of 2 h, after completing the reaction, carrying out suction filtration, washing with water, filtering, and drying to obtain the rubber accelerant DZ product. The purity of the product reaches 99% or more, and the yield of the product reaches 95%. The method has simple process, and is easy for industrialized production.

The invention provides a divided type dental polymeric core build-up material including a first paste (A) and a second paste (B), in which each of the pastes is a paste obtained by mixing at least a (meth)acrylate monomer, a filler having a particle size distribution within a range of 0.1 through 40 μm and an average particle diameter of 0.7 through 10 μm, and a fine particle filler having an average particle diameter of primary particles of 0.001 through 0.050 μm, and having a viscosity at 25° C. of 280 through 470 P, and in which one of the pastes includes an oxidant and the other includes a reductant and at least one of the pastes includes a photopolymerization catalyst. The divided type dental polymeric core build-up material of this invention has high operability in core build-up and forms a polymerically cured substance with a good mechanical property.

The invention provides a method for recycling spherical nickel oxide after mechanical activation using three-section countercurrent acid leaching. The nickel oxide is in a spherical shape or an ellipsoid shape, high in hardness, large in particle size and low in activity, the spherical nickel oxide is subjected to the mechanical activation to the particle size is 50 micrometers or below, three-section countercurrent leaching is carried out on the nickel oxide after the mechanical activation by using sulfuric acid or other inorganic acid with different concentrations from low to high, a properamount of pure and easily-acid-soluble materials are added into a leaching nickel solution, a reducing agent or an oxidizing agent is also added to consume acid until the pH value is 4.0 or above, andthe acid-consuming leaching solution is used for synthesize a ternary precursor, preparing a high-purity nickel plate, nickel sulfate and the like. The method is short in process, easy to implement,high in nickel oxide recycling rate, low in cost, less in investment, easy to realize industrialization and remarkable in economic benefit.

The invention discloses an oil washing agent for carbon dioxide displacement as well as a preparation method and application thereof, and belongs to the field of carbon dioxide displacement oil extraction. The preparation method of the oil washing agent comprises the following steps: reacting a first monomer with formaldehyde in formic acid to obtain a first reactant; reacting the first reactant with borane, adding an oxidizing agent, and reacting under an alkaline condition to generate a second reactant; and reacting the aromatic hydrocarbon and a second monomer to obtain a third reactant, and reacting the second reactant and the third reactant under the heating condition to obtain the oil washing agent, wherein the first monomer is selected from at least one of 3-phenyl-4-pentene-1-amine, 4-pentene-1-amine, 4-methyl-pentene-1-amine and 2-amino-4-pentenoic acid; the second monomer is selected from at least one of succinic anhydride, 2,3-dimethyl succinic anhydride, glutaric anhydride and adipic anhydride; and the aromatic hydrocarbon is selected from at least one of benzene, methylbenzene and ethylbenzene.

The invention discloses a synthetic method of carbocyclic compound. Quinhydrone derivative and conjugated diene react in organic solvent under the catalysis of red lead and trifluoroacetic acid to prepare the carbocyclic compound. The method of the invention is 'one pot' method, takes cheap and accessible red lead as oxidant and catalyst, thus not only oxidizing quinhydrone derivative into corresponding benzoquinone derivative, but also catalyzing Diels-Alder reaction between benzoquinone derivative and conjugated diene, the reaction condition is mild, the reaction time is short, the product is easy to be purified, and the yield is high, thus being suitable for industrialized production and having wide application prospect.