Method for extracting antimony from elemental phosphorous

US5989509A · kind A · utility

Assignee

• EMC Corporation · US

Inventors

• Louis T. Gunkel · Yardley, US
• John Crosby · Macclesfield, GB
• Theodore F. Munday · Kendall Park, US
• Paul Beck · Freudenberg, DE

Key dates

• Filing date: Jun 9, 1997
• Grant date: Nov 23, 1999
• Expiry date: Jun 9, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/047
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for purifying elemental phosphorus that contains antimony using an oxidizer, such as hydrogen peroxide, peroxymonosulfate, peroxydisulfate, or a hypochlorite, in a two phase system containing water and phosphorus as the two liquids. A purified elemental phosphorus having 200 ppb or less antimony content.