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 hypophosphorous acid by using electrolytic method

Abstract: The method for preparing hypophosphorous acid by using electrolysis method is characterized by that it uses the alkali metal hypophosphite as raw material, uses graphite as anode, uses stainless steel as cathode and uses the mehtod of electrolyzing water by utilizing electrolysis bath to make electrolysis, in which the raw material chamber possesses aqueous solution of sodium hypophosphite whose concentration is 300-500 g/L, the primary solution in anode chamber is sulfuric acid solution whose concentration is 5-15 g/L, the primary solution in the cathode chamber and its adjacent buffer chamber is an alkali solution whose concentration is 5-15 g/L, and the primary solution in the product chamber and its adjacent buffer chamber is the hypophosphorous acid solution whose concentration is 5-15 g/L Said invention does not produce waste residue and waste liquid, and it is a clean production method

Process for preparing phosphorus acid from industrial waste materials

Abstract: An improved process is provided for preparing highly purified phosphorus acid from industrial waste materials which are produced as by-products from the manufacture of sodium hypophosphite. Such industrial waste materials contain substantial quantities of calcium phosphite, and appreciable quantities of various metals such as iron, magnesium, aluminum and arsenic. The process of the present invention comprises, in a preferred embodiment thereof, reacting a slurry of said waste materials with sodium carbonate to produce calcium carbonate as a precipitate and a solution of sodium phosphite. The sodium phosphite solution is then passed through a cation ion exchange resin in the hydrogen form to produce a highly purified phosphorus acid product having significantly reduced quantities of metallic impurities.

Process for sodium hypophosphite

Abstract: Either commercial yellow phosphorus or a phosphorus sludge is reacted with a slurry of calcium hydroxide in aqueous sodium hydroxide to form a sodium hypophosphite solution containing calcium and hydroxide ions. The solution is neutralized with phosphoric acid or an acid phosphate salt with the co-production of an insoluble calcium phosphate. The neutral solution is contacted with an ion exchange resin charged with sodium ions to remove any remaining calcium ions.

Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell

Abstract: The invention relates to a preparation method of a high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of a direct formic acid fuel cell and belongs to the technical field of fuel cells. The preparation method comprises the following steps: dispersing a carrier and cobalt chloride hexahydrate in water, drying to obtain a first compound carrier by distillation after ultrasonic dispersing and stirring; mixing and grinding the first compound carrier and hydrated sodium hypophosphite for one-hour reaction, and washing and drying the reactant to obtain a second compound carrier; dispersing the second compound carrier in glycol, adding hexachloropalladate, and performing ultrasonic dispersing and stirring to obtain a first turbid liquid; stirring the first turbid liquid at the room temperature, and regulating the pH value with sodium hydroxide to obtain a second turbid liquid; performing microwave radiation on the second turbid liquid, and obtaining a supported palladium catalyst. The palladium-based catalyst prepared by the method has extremely high catalytic activity and relatively high stability to formic acid electro-oxidation. Meanwhile, the capacity of the precious metal palladium can be reduced, and the method is simple to operate, short in preparation period and suitable for mass production.