Process for making alkali metal hypophosphite solutions

US4450147A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Georg Elsner · Hürth, DE
• Hermann Hack · Lechenich, DE

Key dates

• Filing date: Feb 8, 1983
• Grant date: May 22, 1984
• Expiry date: Feb 8, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/165
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The disclosure relates to a process for making alkali metal hypophosphite solutions by reacting yellow phosphorus with an aqueous solution of an alkali metal hydroxide and/or carbonate. The disclosure provides more particularly for an aqueous hydrogen peroxide solution to be added to the mixture obtained by reacting the phosphorus with the alkali metal compound solution specified.