Y. Xiao-Qing
2006
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0
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Journal
Applied Chemical Industry
Abstract
Tetrakis(hydroxymethyl) phosphonium sulfate(THPS) was synthesized successfully with yellow phosphorus,zinc powder,sulfuric acid and formaldehyde as raw materials.The effects of different reaction conditions on the yield of THPS were discussee systematically.And the optimal reaction conditions were determined by orthogonal experiment as follows: the ratio of yellow phosphorus,zinc powder,sulfuric acid and formaldehyde is 1∶2.5∶7.5∶5,the reaction temperature is 85℃,the reaction time is(6 h.)In order to determine the active matter contents in the products,a new method by ion-exchange process was established,the result showed that the content of THPS was 79.20%.The products were recrystallied in 36% acetic acid and needle crystal was obtained successfully.