Topic
Sodium hypophosphite
About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.
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TL;DR: In this article, the synthesis of copper nanoparticles was achieved by reduction of copper sulfate solution using sodium hypophosphite (NaH2PO2), and the nanoparticles were characterized by using SEM and XRD techniques.
Abstract: Synthesis of copper nanoparticles was achieved by reduction of copper sulfate solution using sodium hypophosphite (NaH2PO2). The nanoparticles are characterized by using SEM and XRD techniques. The XRD analysis and theoretic calculation indicate that the products have a fcc structure, and the size of crystallite is about 20 nm. Different solvents have been used to produce copper particles with different shapes, and the size of the particles can be controlled by varying reaction condition.
3 citations
Patent•
28 Aug 2013
TL;DR: In this article, a process of extracting phosphorous acid from sodium hypophosphite slag is described, where a high purity product is obtained specifically by a cation exchange method through decompression, distillation and crystallization.
Abstract: The invention relates to a process of extracting phosphorous acid from sodium hypophosphite slag, wherein a high purity phosphorous acid product is obtained specifically by a cation exchange method through decompression, distilling and crystallization. The process comprises the following steps: extracting calcium phosphate solid from a calcium phosphate in a calcium phosphate workshop and reacting with sodium carbonate; separating and purifying to obtain a sodium phosphite liquor; decompressing, evaporating and crystallizing the sodium phosphite liquor after cation exchange through D001 resin to obtain the high purity phosphorous acid product. The process is simple in process, less in energy consumption and high in product purity, and does not cause secondary pollution at the same time.
3 citations
TL;DR: An indirect EDTA titrimetric method is described for the determination of tellurium in thermoelectric materials and synthetic mixtures and is accurate and selective.
3 citations
Patent•
04 Jan 2012
TL;DR: In this paper, a method for nano-silver powder in viscous medium is presented, which is suitable for large-scale production, and solves the problems that the nano silver powder prepared by the conventional chemical preparation method is easily oxidized and easily agglomerated.
Abstract: The invention discloses a method for preparing nano silver powder in viscous medium. The method comprises the following steps of: mixing sodium nonylphenol polyoxethyiene ether sulfate, TEA dodecylbenzenesulfonate, ammonium dodecylbenzenesulphonate, coconut oil alcohol acylamide, octadecyl dimethyl amine oxide, sodium carboxymethylcellulose, polyoxyethylene glycol 6000 bisstearate, ethylenediamine tetraacetic acid disodium salt, ethylene oxide, benzotriazole and deion water and stirring uniformly, preparing the viscous medium, adding silver acetate and silver lactate and stirring uniformly, adding sodium hypophosphite and stirring till full reaction, then adding the deion water for dilution according to a ratio of 1:1.5 of the all material amount to the deion water, reducing the viscosity, and obtaining the nano silver powder by pressure filtration, washing with the deionized water, washing with acetone and vacuum drying. The selected raw materials are easily obtained; the method is short in production process, high in production efficiency, low in production cost and low in energy consumption; the powder is not easily agglomerated, and the powder has good dispersibility; and the method is suitable for large-scale production, and solves the problems that the nano silver powder prepared by the conventional chemical preparation method is easily oxidized and easily agglomerated.
3 citations
Patent•
21 Dec 2016
TL;DR: In this paper, a multi-component complex agent and an acidic chemical plating nickel and phosphorus solution with the same ingredients were used to achieve the same results as in this paper.
Abstract: The invention discloses a multi-component complex agent and acidic chemical plating nickel and phosphorus solution with the same The multi-component complex agent comprises one or two of aspartic acid and glycine, lactic acid, citric acid, malic acid, succinic acid and one or two of malonic acid and propanoic acid The acidic chemical plating nickel and phosphorus solution comprises nickel sulfate, sodium hypophosphite, the multi-component complex agent, sodium acetate, ammonium bifluoride, stabilizers and brighteners The multi-component complex agent and the acidic chemical plating nickel and phosphorus solution have the advantages that after the acidic chemical plating nickel and phosphorus solution is used, the surface areas of plated single-groove workpieces can reach 11000 dm , the surface areas of single-day plated workpieces can reach 1800-2600 dm , the continuous plating time can reach 72 hours, and the thicknesses of plated layers can reach 50-125 micrometers; deviation of the ellipticity of plated rolls and corrugators rolls can be prevented from exceeding standards, the plated layers are excellent in performance, grinding can be omitted, and accordingly the production cost can be saved
3 citations