Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates

US7622602B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Thodla Ramgopal · Savanuru, IN
• Mario Perez Collado · Cartagena, ES
• Vijaya Kumar Narasaiah · Savanuru, IN
• Ignacio Vic Fernandez · Murcia, ES

Key dates

• Filing date: Oct 12, 2005
• Grant date: Nov 24, 2009
• Expiry date: Mar 28, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of making a dialkyl carbonate comprises: reacting, in a reactor comprising tantalum, an alkanol, oxygen, and carbon monoxide, in the presence of a catalyst. The reaction occurs in a mixture comprising a liquid phase wherein the liquid phase comprises about 4 to about 12 weight percent water based on the total weight of the liquid phase.