Various 1,4-disubstituted-2,3,5,6-tetrahydroxy-1,4-diphosphorinanes, their oxides and sulfides, methods for the production thereof, flame-retarded compositions of matter containing them and froth flotation processes therewith, are disclosed.
本文公开了各种1,4-二取代-2,3,5,6-四羟基-1,4-二
磷杂环烷及其氧化物和
硫化物的制备方法,含有它们的阻燃物质组合物以及与其一起使用的泡沫浮选工艺。