Process for improving the reactivity of phosphorus pentasulfide

Details Process for improving the reactivity of phosphorus pentasulfide Process for improving the reactivity of phosphorus pentasulfide

C - Chemistry, Metallurgy

01

B

23/79

C01B 25/14 (2006.01)

Patent

CA 1079479

PROCESS FOR IMPROVING THE REACTIVITY OF PHOSPHORUS PENTASULFIDE ABSTRACT OF THE DISCLOSURE: The reactivity of phosphorus pentasulfide produced by reacting phosphorus and sulfur at a temperature higher than the melting point of phosphorus pentasulfide and allowing the resulting melt to cool and solidify on a cooling device is improved. To this end, liquid phospho- rus pentasulfide is placed on, or introduced into, a cooling device; an upper liquid P2S5-layer portion A is separated immediately from a solidified lower P2S5-layer portion B which is in direct contact with the cooling surface area of the cooling device; the upper P2S5-layer portion A is recycled to a P2S5 melt; the lower P2S5- layer portion B is removed from the cooling device and collected as final product; the reactivity of the collected P2S5-layer portion B is increased to the same extent as the quantitative ratio of the P2S5-layer portion A to the P2S5- layer portion B is increased.

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