Process for the continuous transvinylation of carboxylic acids with vinyl acetate

US8975437B2 · kind B2 · utility

Assignee

• Celanese International Corporation · US

Inventors

• Ilias S. Kotsianis · Houston, US
• Barbara F. Kimmich · League City, US
• Melchior A. Meilchen · Port Aransas, US
• Hang Wang · Houston, US
• Prashant Purushottam Barve · Pune, IN
• Bhaskar D. Kulkarni · Pune, IN
• Gopal M. Chaphekar · Pune, IN
• Ravindra William Shinde · Jamkhed, IN
• Milind Yashwant Gupte · Jamkhed, IN
• Sanjay P. Kamble · Pune, IN
• Satish N. Shintre · Pune, IN

Key dates

• Filing date: May 3, 2011
• Grant date: Mar 10, 2015
• Expiry date: Feb 12, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate—bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.