Sodium hypophosphite

About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.

Method for preparing nickel phosphor alloy nanowire

Abstract: The invention disclosed the method for preparation of nickel-phosphor alloy nanometer line. The method comprises the following step: sensitizing the aluminum oxide mould with stannochlor solution, activating the aluminum oxide mould with palladium bichloride solution, then putting the aluminum oxide mould into the liquid containing sodium hypophosphite and nickel sulfate, and getting the nickel-phosphor alloy nanometer line. The method is no electrochemical deposition, so the operation is simple, the cost is low, and the nickel-phosphor alloy nanometer line is dense and homogeneous.

Method for polymerizing diallylamine and derivative thereof

Abstract: PURPOSE: To obtain a low-molecular weight polymer without affecting polymerization rate, etc., by polymerizing a specific monomer using a hypophosphorous acid (salt) as a polymerization degree regulator. CONSTITUTION: The objective polymer obtained by polymerizing a monomer (e.g. diallydimethylammonium chloride) expressed by the formula (R 1 and R 2 are H, 1-5C alkyl, benzyl or cyclohexyl; X - is F - , Cl - , Br - , I - , NO, HSO or H 2 PO) using hypophosphorous acid and/or salt thereof (e.g. sodium hypophosphite) as a polymerization degree regulator. COPYRIGHT: (C)1991,JPO&Japio

Electroless plating method

Abstract: PURPOSE:To perform electroless plating by which magnetic films having required characteristics can be obtained by changing the entire concn while maintaining the respective component ratios of a plating bath contg Co ions, etc, reducing agents for these metallic ions, pH buffers, pH controllers and complexing agents for said metallic ions constant thereby controlling magnetic characteristics CONSTITUTION:A plating bath consisting of an aq soln contg Co ions (eg; cobalt sulfate) and Ni ions (eg; nickel sulfate), reducing agents for these metallic ions (eg; sodium hypophosphite), pH buffers (eg; sodium malonate), pH controllers (eg; NH4OH) and complexing agents for said metallic ions is prepd Electroless plating is applied on the non-magnetic Ni-P layer on, for example, a non-magnetic substrate by using such plating bath If the coercive force Hc of the magnetic films to be treated exceeds the permissible range on account of a difference in the purity of the chemicals used in the plating bath or the lapse of plating data during this time, it is possible to maintain the Hc value within the permissible value by changing the whole concn of the plating bath while maintaining the respective component ratios of the plating bath constant

Regenerating method of electroless plating bath

Abstract: PROBLEM TO BE SOLVED: To reuse a bath without mixing harmful impurity ions by adding a double salt of sulfate, chloride. etc., of metals to an electroless Ni-based metal plating bath containing sodium hypophosphite as a reducing agent to regenerate the bath and crystallizing and precipitating accumulated sodium sulfate to remove. SOLUTION: A sulfate, chloride, carbonate, hydroxide or double salt of a metal same as the metal which constitutes the plating film to be precipitated from an electroless plating bath is added to the electroless plating bath. Otherwise, if two or more kinds of metals are to be precipitated, a salt of at least one of the metals is added to the bath. The plating bath contains a water-soluble sulfate of the metal to be precipitated by electroless process, a complexing agent and NaH2 PO2 as a reducing agent and has accumulation of Na2 PO3 . The amt. of the salt to be added is determined to give higher metal concn. than the metal ion conc. in the plating process of the bath. The insoluble hypophosphite thus produced and precipitated is removed to regenerate the bath. Thereby, the bath can be repeatedly used. When Na2 SO4 is accumulated over a specified amt., the plating liquid is cooled to a lower temp. than room temp. to crystallize and precipitate Na2 SO4 to remove.

Method for preparing sodium hypophosphite by integrally using sludge phosphorus

Abstract: The invention relates to a method for integrally using sludge phosphorus which is solid waste generated in the industry for preparing yellow phosphorus in an electric furnace method and belongs to thetechnical field of chemical engineering and environmental protection. The invention comprises the following technical processes: firstly, sludge phosphorus, water, calcium hydroxide and sodium hydroxide are added into a reactive vessel for reaction under the conditions of heating and agitation, and hexadecyl trimethyl ammonium bromide as an emulsifying agent is added into the reactive vessel; secondly, air is inputted so that the superfluous calcium hydroxide in reaction liquid is removed after the reaction is finished; thirdly, the reaction liquid is filtered, sodium carbonate is added intothe filtrate, calcium ions are removed in a mode of precipitation of calcium carbonate, and filter residue is washed by water; and fourthly, the filtrate is concentrated, crystallized by cooling and centrifugalized, crystals of the sodium hypophosphite are obtained, and phosphine which is a subsidiary product in the reaction is catalyzed and oxidized into phosphorus pentoxide which reacts with water to produce phosphoric acid. The invention has steady quality of the sodium hypophosphite, safe production operation, good treatment effect on the sediment phosphorus, environmental protection and comprohensive utilization of resources.