84 results about "Stannous Chloride Dihydrate" patented technology

The invention discloses an EPDM (ethylene propylene diene monomer) rubber insulated / jacketed cable with high strength, oil resistance and aging resistance. The EPDM rubber insulated / jacketed cable comprises following raw materials: EPDM rubber, nitrile butadiene rubber, maleic anhydride grafted polypropylene, an ethylene-vinyl acetate copolymer, diphenyl hexadiphthalein diamine, stearic acid, zinc oxide, superfine fully vulcanized powder nitrile butadiene rubber, tin(II) chloride dehydrate, bromo-octyl-phenolic curing resin, calcined kaolin, zinc methacrylate, carbon nano tubes, superfine silica, calcium sulfate whiskers, polyacrylonitrile fibers, a silane coupling agent, lanthanum glutamic dithiocarbamate, petroleum wax, naphthenic oil, an anti-aging agent and an accelerator. The EPDM rubber insulated / jacketed cable material with high strength, oil resistance and aging resistance serves as insulation and / or a jacket in a cable and has high strength, good oil resistance, aging resistance and combination properties and long service life.

The invention relates to a method for preparing porous spherical stannous oxide nano material. The method comprises the steps of: slowly dripping a certain amount of prepared sodium hydroxide anhydrous ethanol solution into stannous chloride anhydrous ethanol solution, and stirring while dripping; after dripping, continuously stirring for 10-20min to obtain stannous oxide precursor liquid, wherein in the obtained stannous oxide precursor liquid, the molar concentration of dihydrated stannous chloride is controlled to be 0.125-0.25mol / L and the molar ratio between the dihydrated stannous chloride and sodium hydroxide is controlled to be 1: 2-1: 3.5; putting the prepared stannous oxide precursor liquid into a reaction kettle, wherein the filling degree is 80-90%; sealing the reaction kettle, and carrying out heat preservation on the reaction kettle in an electric constant temperature drying oven for 6-15h at the temperature of 130-170 DEG C; then naturally cooling the reaction kettle to room temperature; and carrying out centrifugation, washing and drying on the product to obtain gray black nano stannous oxide material. The method is simple in operation, mild in condition, easy in control of the condition, low in cost, less in pollution and easy for industrial production; and the prepared porous spherical stannous oxide nano material has the advantages of being even in morphology, high in component purity and the like.

The invention relates to an alcohol gas sensor designed based on an alcohol molecular imprinting mechanism. The high-performance alcohol gas sensor is composed of a ceramic pipe and an SnO2 film which is uniformly and densely distributed on the surface of the ceramic pipe and has a network structure, wherein the grain diameter of nano SnO2 in the SnO2 film is 9+ / -2 nanometers; BJH pore diameter distribution is intensive; the average pore diameter is 4.3+ / -0.1 nm. A preparation method comprises the following steps: dissolving stannous chloride dihydrate (SnCl12*2H2O) into a mixed solution of water and alcohol; carrying out a hydrothermal reaction and calcining to prepare a white medium-pore-diameter SnO2 nano material with a network structure; adding alcohol and mixing to prepare slurry; uniformly coating the ceramic pipe with the film; and drying to prepare the sensor. According to the alcohol gas sensor provided by the invention, the range of the concentration of alcohol gas detected is 4ppm-100ppm, the responding time is 6+ / -2 seconds and the recovering time is 22+ / -3 seconds.

The invention discloses a solvothermal coreduction method for preparing a tin / graphene nanometer composite material. The method comprises the following steps: sequentially adding an ethanol solution of polyvinylpyrrolidone, an ethanol solution of dihydrate tin chloride and an ethanol solution of graphene oxide into a reactor sequentially and mixing uniformly in the argon environment; adding an ethanol solution of sodium borohydride into the mixed solution, stirring uniformly at a room temperature and performing reduction reaction; and after the reaction, washing and drying to obtain the tin / graphene nanometer composite material. The reduction degree of the graphene oxide in the tin / graphene nanometer composite material prepared by the method is high, equipment and the process are simple, and a green and environment-friendly method is provided for preparation of tin / graphene.

The invention discloses a printed circuit board chemical copper plating activation solution. The printed circuit board chemical copper plating activation solution comprises the following raw materials in parts by mass: 100-300 parts of stannous chloride dihydrate, 2-6 parts of palladium chloride, 150-180 parts of sodium chloride, 4-8 parts of sodium stannate trihydrate, 20-30 parts of additives, 0.5-2 parts of a reducing agent and 500-600 parts of deionized water. By adopting a sodium chloride solution, palladium chloride is prepared into liquid A, and stannous chloride dihydrate and the reducing agent are prepared into liquid B; under an ultrasonic action, the liquid A is dispersed into the liquid B, and sodium stannate trihydrate, the additives and the reducing agent are assisted as auxiliary stabilizing agents to prepare the chemical copper plating activation solution. The chemical copper plating activation solution disclosed by the invention is used for activating a printed circuit board before chemical copper plating, can achieve the effects of activating the non-conductor surface of the printed circuit board and performing hole activation on the printed circuit board, and has the advantages of achieving low hydrochloric acid content and high stability, saving the raw materials and reducing the environmental pollution without damaging a substrate of the printed circuit board.

A method for synthesizing mesalazine is disclosed. The method comprises the following steps: 1) adding p-nitrophenol, p-toluenesulfonic acid, absolute ethyl alcohol and hexamethylenetetramine, stopping heating after the reaction is finished, heating to room temperature while stirring with ice water, separating out solids, filtering, washing and drying to obtain 5-nitrosalicylaldehyde; 2) adding the 5-nitrosalicylaldehyde, potassium tert-butoxide, copper salt and acetonitrile, adding tert-butyl hydroperoxide while stirring, after the reaction is finished, performing vacuum concentration to remove the solvent, pouring cold water into residues, stirring, performing suction filtration, adjusting the pH value of the filtrate with hydrochloric acid, performing suction filtration, and drying to obtain 5-nitrosalicylic acid; and 3) adding stannous chloride dihydrate, concentrated hydrochloric acid, the 5-nitrosalicylic acid and ethanol, carrying out vacuum concentration after the reaction is finished, dissolving residues in water, adjusting the pH value with a concentrated hydrochloric acid solution, standing for crystallization, carrying out suction filtration, washing filter cake with water, and drying to obtain mesalazine. No isomer is generated, and the yield is high; the method does not need high-temperature and high-pressure conditions; the reaction cost is low; and raw materialsand auxiliary materials with high toxicity and heavy environmental pollution are not used.