Preparing P.sub.2 S.sub.5 of low reactivity

US4419104A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hermann Niermann · Lechenich, DE
• Gunter Reichert · Bornheim, DE
• Hans-Peter Ebert · Lechenich, DE
• Friedrich Neumann · Moraga, US

Key dates

• Filing date: Jul 2, 1981
• Grant date: Dec 6, 1983
• Expiry date: Jul 2, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Phosphorus pentasulfide of low reactivity is made by solidifying molten phosphorus pentasulfide on a cooling cylinder that delivers the solidified product at a temperature of 150.degree. to 220.degree. C., and that product is immediately introduced into a heat-insulated container and freed therein from its immanent or sensible heat by cooling at a rate of at most 30.degree. C. per hour without the expenditure of any energy to control the cooling.