Stabilized red phosphorus and process for making it

US4136154A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Horst Staendeke · Lohmar, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE
• Werner Klose · Lechenich, DE

Key dates

• Filing date: Oct 13, 1977
• Grant date: Jan 23, 1979
• Expiry date: Oct 13, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/006
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Production of stabilized pulverulent red phosphorus. The phosphorus so stabilized comprises a homogeneous blend of red phosphorus particles with a size of at most about 2 mm and a metal compound of the second or third group of the Periodic System as an oxidation stabilizer, wherein the metal compound is the aluminum, calcium or zinc salt of a phosphinic acid of the general formula ##STR1## in which R.sub.1 and R.sub.2 each stand for an alkyl, cycloalkyl, aryl or aralkyl group having 1 to 20 carbon atoms, the metal compound being present in the homogeneous blend in a proportion of about 0.5 to 5 weight %.