Method for preparing aluminum hypophosphite

A technology of aluminum hypophosphite and hypophosphorous acid, which is applied in the direction of hypophosphorous acid and phosphorus oxyacid, can solve the problems of no introduction of aluminum hypophosphite synthesis process, low yield of aluminum hypophosphite, etc., achieve good application prospects and short reaction cycle , The effect of simple and easy process

Active Publication Date: 2014-01-08
湖南美莱珀科技发展有限公司
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AI Technical Summary

Problems solved by technology

However, its research focuses on the application and comparison of various hypophosphite flame retardants in the direction of nylon 6, and there is no detailed introduction to the synthesis process of aluminum hypophosphite (Li Qifei. Synthesis of hypophosphite flame retardants and flame retardant nylon 6 Research, Northeast Forestry University, Master The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] In a 5L reactor with stirring, at 40°C, add 3L of deionized water, add 2mol of aluminum hydroxide, and stir well to disperse the additives evenly. Subsequently, 6 mol of hypophosphorous acid was continuously added dropwise, the temperature was gradually raised to 70° C. during the dropwise addition, and the reaction was maintained for 4 hours, then filtered and dried to obtain aluminum hypophosphite.

Embodiment 2

[0012] In a 2L reaction kettle with stirring, at 50°C, add 1L of deionized water and 1mol of aluminum hydroxide, and stir thoroughly to disperse the additives evenly. Subsequently, 2 mol of hypophosphorous acid was continuously added dropwise, the temperature was gradually raised to 60° C. during the dropwise addition, and the reaction was maintained for 6 hours, then filtered and dried to obtain aluminum hypophosphite.

Embodiment 3

[0014] In a 20L reactor with stirring, at 30°C, add 15L of deionized water, add 10mol of aluminum hydroxide, and stir well to disperse the additives evenly. Subsequently, 25 mol of hypophosphorous acid was continuously added dropwise, and the temperature was gradually raised to 80° C. during the dropwise addition, and kept for 8 hours, and then filtered and dried to obtain aluminum hypophosphite.

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Abstract

The invention discloses a method for preparing aluminum hypophosphite. The method comprises the following steps that a certain amount of aluminum hydroxide is added to a reaction kettle with a stirring function, a certain amount of water is further added, the mixture is thoroughly stirred, and therefore the added materials are evenly scattered. An appropriate amount of hypophosphorous acid is dripped to the mixture at the temperature of 50 DEG C-100 DEG C and the reaction is kept for 3h-8h; the temperature of the mixture is reduced to the indoor temperature, the mixture is filtered and dried, and therefore the aluminum hypophosphite is obtained, wherein the volume of the water: the number of moles of the aluminum hydroxide: the number of moles of hypophosphorous acid = 1L: 1mol-2mol: 2mol-8mol. According to the method for preparing the aluminum hypophosphite, the yield is high, the technology is simple and easy to conduct, cost is low, the performance cost ratio is high, the obtained product is good in heat stability, and the application prospect is good.

Description

technical field [0001] The invention relates to a preparation method of aluminum hypophosphite. Background technique [0002] Aluminum hypophosphite has high phosphorus content, has the advantages of good thermal stability, low water solubility, and high flame retardant effect. It can be applied to modified plastics such as PA6 and PBT, and has good flame retardant effect. When added to PBT, the heat release rate and the heat generated during combustion will decrease sharply, and the amount of carbon formed after combustion will increase. The flame retardant performance can reach the UL94 standard V-0 level, and through experiments, it is better than the PBT flame retardant currently used in China. The flame retardant effect can be increased by 60%. The modified aluminum hypophosphite has good thermal stability, does not cause the decomposition of the polymer during processing, and does not affect the plastic molding composition. This product is poorly soluble in water and...

Claims

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Application Information

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IPC IPC(8): C01B25/165
Inventor 彭治汉孙柳李永林彭治权何小春
Owner 湖南美莱珀科技发展有限公司
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