申请人:American Cyanamid Company
公开号:US04555368A1
公开(公告)日:1985-11-26
A new and improved method for making diorganomonothiophosphinate compounds having the formula: ##STR1## which comprises oxidizing a secondary phosphine in aqueous media to form the corresponding secondary phosphine oxide and reacting the secondary phosphine oxide thus formed with an excess of sulfur and an hydroxide compound at elevated temperature for a time sufficient until formation of the diorganomonothiophosphinate compound is substantially complete. The new and improved process of the present invention permits the preparation of diorganomonothiophosphinate. The products are stable in aqueous systems and are useful as sulfide collectors in froth flotation beneficiation of sulfide minerals.
一种制备二有机单硫代磷酸酯化合物的新方法,其化学式为:##STR1## 该方法包括在水介质中氧化二级膦,形成相应的二级膦氧化物,然后在高温下与过量的硫和一个羟基化合物反应,直到二有机单硫代磷酸酯化合物的形成基本完成。本发明的新的改进工艺允许制备二有机单硫代磷酸酯。所得产品在水系统中稳定,可用作硫化物矿物的泡沫浮选选矿中的收集剂。