Patent · US Expired

Process for making phosphorus pentasulfide

US4732745A · kind A · utility

2Cited by

3References

3Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Herbert Diskowski · Lechenich, DE
Heinz Stephan · Hürth, DE
Hermann Niermann · Lechenich, DE

Key dates

Filing date	Nov 26, 1986
Grant date	Mar 22, 1988
Priority date	—
Expiry date	Nov 26, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B25/14
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Phosphorus pentasulfide is made. To this end gaseous nitrogen is introduced into the pipes feeding a reactor with a phosphorus melt and sulfur melt and/or into the outlet pipe for the phosphorus pentasulfide melt, the nitrogen being admitted under a pressure lower than the static pressure exerted in the pipes by the quantity of melt upstream of the gas inlets.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.