Patent
Method for preparing aluminum hypophosphite
TLDR
In this paper, a method for preparing aluminum hypophosphite was proposed, which includes the following steps of firstly, preparing sodium hypoph phosphite solution with concentration of 2-6mol/L, adjusting pH (potential of hydrogen) to be 3-5 preferentially within 3-6.5.Abstract:
The invention relates to a method for preparing aluminum hypophosphite. The method includes the following steps of firstly, preparing sodium hypophosphite solution with concentration of 2-6mol/L, adjusting pH (potential of hydrogen) to be 3-5 preferentially within 3-6.5; secondly, preparing aluminum sulfate solution; and thirdly, subjecting the sodium hypophosphite solution and the aluminum sulfate solution to reaction by heating on the acid condition to generate aluminum hypophosphite. The aluminum sulfate is added into the sodium hypophosphite solution for reaction within a certain temperature range, so that harms caused by volatilization of hypophosphorous acid during preparing of the aluminum hypophosphite are avoided, operation is simplified, yield of products is high, cost is low and industrialization is easy to realize.read more
Citations
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Patent
Preparation method of aluminium hypophosphite
TL;DR: In this paper, a preparation method of aluminium hypophosphite is presented, which consists of: a, preparing a sodium hypoph phosphite solution; b, preparing an aluminium nitrate solution; and c, uniformly mixing the sodium hypphosphite solution with the aluminium nitric solution, regulating the pH (potential of Hydrogen) to 2-6, heating and reacting to form the target product aluminium pyrophosphite.
Patent
Preparation method of aluminum hypophosphite
TL;DR: In this paper, a preparation method of aluminum hypophosphite is described, which consists of three steps: firstly, preparing a water solution of sodium hypophphosphite; secondly, preparing an ethanol solution of aluminum chloride; and finally, preparing aluminum hypoposphite.
Patent
Method for micron-scale aluminum hypophosphite by virtue of alcohol-water method
Liu Jiping,Zhao Wei,Hongcheng Li +2 more
TL;DR: In this article, a method for micron-scale aluminum hypophosphite by virtue of an alcohol-water method was proposed, which belongs to the manufacturing field of polymer-material fire retardants.
Patent
Method of using glufocinate byproduct waste residue to prepare aluminum hypophosphite
TL;DR: In this paper, a method of using glufocinate byproduct waste residue to prepare aluminum hypophosphite was proposed, which has the advantages of mild reaction and high reaction rate.
Patent
Preparation method of modified aluminium hypophosphite
Yang Jinxiao,Yang Zhongjun +1 more
TL;DR: In this article, a modified aluminium hypophosphite can be excellently dispersed into a high molecular material, the mechanical performance and flame-retardant property of the high-molecular material can be obviously improved, and the electrical property of resin can be maintained; the preparation is simple in technology, temperature rise and regulation of pH value of the reaction solution are not needed, the yield can achieve up to 98.0%, and the modified aluminium hyperphosphite is pollution free and environmental friendly.
References
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Patent
Polyester compositions flame retarded with halogen-free additives
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TL;DR: In this paper, methods for the production of nickel or ammonium hypophosphite are described, including combining sodium hypophoxide with ammonium sulfate to produce sodium sulfate.
Patent
Production of nickel hypophosphite
TL;DR: In this paper, powder or a water dispersed slurry of nickel hydroxide and/or nickel carbonate is added to a warmed aqueous solution of hypophosphorous acid at a molar ratio of P element to Ni element (P/Ni) in the range of 2.2-3.