Patent
Preparation method of aluminium hypophosphite
TLDR
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.Abstract:
The invention discloses a preparation method of aluminium hypophosphite. The preparation method comprises the following steps of: a, preparing a sodium hypophosphite solution; b, preparing an aluminium nitrate solution; and c, uniformly mixing the sodium hypophosphite solution with the aluminium nitrate solution, regulating the pH (potential of Hydrogen) to 2-6, heating and reacting to form the target product aluminium hypophosphite. The method disclosed by the invention has the advantages that the reaction is carried out through directly taking water as solvent and the temperature is lower, so that the reaction is easy to control; the particle size of the obtained aluminium hypophosphite is less than 50 micrometers, the aluminium hypophosphite is white powder and no extra color processing is needed, so that the purity is higher and the yield of the obtained target product is 92-99%; the conventional synthetic process route is simplified and no toxic substance is produced, so that the preparation method is friendly to environment and low in cost; and high-efficiency fire retardant and combustion improver are obtained in the same reaction, so that the resource utilization rate is high and better industrial prospect is provided.read more
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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
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.
Patent
Method for joint production of hypophosphite of calcium, magnesium and aluminum
TL;DR: In this paper, a method for joint production of hypophosphite of calcium, magnesium and aluminum was proposed, which has the advantages of mild reaction conditions, little pollution, pure product, high utilization rate, high comprehensive yield, greatly reduced cost, and simple and practicable process route.
Patent
Method for preparing aluminum hypophosphite
TL;DR: In this article, a method for preparing aluminum hypophosphite is described, in which a certain amount of aluminum hydroxide is added to a reaction kettle with a stirring function, and then the mixture is thoroughly stirred, and therefore the added materials are evenly scattered.
Patent
Manufacturing Method of Hypophosphorous Type Flame Retardants
Lee Kyong Hwan,Oh Se Saeng +1 more
TL;DR: In this paper, a manufacturing method of a hypophosphite flame retardant is described, which finely controls particle size by including reaction with hypoph phosphite and aluminum salts under ultrasonic energy application and can solve discoloration and heat resistance problems.
References
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Patent
Process for preparation of dialkylphosphinic salts
TL;DR: In this article, a process for preparation of salts of dialkylphosphinic acids is described, which comprises a) reacting hypophosphorous acid and/or its salts with olefins in the presence of a free-radical initiator to give dialkphosphoric acid and or their alkali metal salts, in a solvent system, and b) reacting the dialklphosphinic acids and their corresponding metal dialkophosphinates obtained in a) with compounds of the metals Mg, Ca, Al, Zn, Ti, Sn
Patent
Method for preparing aluminum hypophosphite
TL;DR: 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.