Stabilized red phosphorus and process for making it

US4113841A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Horst Staendeke · Lohmar, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE
• Theodor Auel · Ilvesheim, DE
• Werner Kloss · Lechenich, DE

Key dates

• Filing date: Jul 13, 1977
• Grant date: Sep 12, 1978
• Expiry date: Jul 13, 1997

Classification

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

Abstract

The invention provides stabilized pulverulent red phosphorus. It 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, magnesium, calcium or zinc salt of an alkyl-, cycloalkyl-, aryl- or aralkylphosphonic acid 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 %.