Triphenylphosphine oxide complex process

US6011181A · kind A · utility

Assignee

• BASF SE

Inventors

• Arthur Mark Isola · Sheffield, GB
• Nicholas J. Holman · Leominster, US
• Gerald Bernard Tometzki · Nottingham, GB
• John Paul Watts · Swansea, GB
• Stefan Koser · Ludwigshafen, DE
• Ralf Klintz · Havelsee, DE
• Peter Munster · Römerberg, DE

Key dates

• Filing date: Dec 17, 1997
• Grant date: Jan 4, 2000
• Expiry date: Dec 17, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D487/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for reducing the level of tri-substituted phosphine, arsine and/or stibine oxide from a mixture comprising a desired product and at least one such oxide is provided, comprising the addition of a metal salt to the mixture to form a complex with the oxide, and removing the complex from the mixture. This process has particular utility for removing triphenylphosphine oxide from a mixture--a task that was previously hard to perform.