Process for the manufacture of dialkylphosphites

US8829222B2 · kind B2 · utility

Assignee

• STRAITMARK HOLDING AG · CH

Inventors

• Patrick Notté · Wavre, BE
• Albert Devaux · Mont-Saint-Guibert, BE

Key dates

• Filing date: May 28, 2010
• Grant date: Sep 9, 2014
• Expiry date: May 28, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/1411
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the manufacture of dialkyl phosphites is disclosed. In detail, dialkyl phosphites are prepared starting from P4O6, or partially hydrated species thereof cumulatively P—O, by reacting specific molar ratios of alcohol and P—O, containing from 1 to 6 P—O—P bonds in the molecule, in the presence of trialkylphospite (TAP) to thus yield high purity and high yield of dialkyl phosphites. The P—O reactant is preferably represented by liquid P4O6.