Process for working up crude, liquid vinyl acetate

US6228226A · kind A · utility

Assignee

• Celanese GmbH · US

Inventors

• Stefan Hess · Erlangen, DE
• Michael Mark · Matrei in Osttirol, AT
• Melchior A. Meilchen · Port Aransas, US
• Johann Stamm · Export, US
• Thomas Vernaleken · Hofheim, DE
• Martin Gerald Wagner · Wilmington, US

Key dates

• Filing date: May 21, 1999
• Grant date: May 8, 2001
• Expiry date: May 21, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for working up crude, liquid vinyl acetate feed containing acetic acid, water and ethyl acetate and optionally smaller amounts of other impurities by distillation, wherein there is introduced into the distillation column, above the feed point of the crude, liquid vinyl acetate, 0.1 to 5% by weight of water, based on the crude, liquid vinyl acetate feed, and 0.1 to 60% by weight of acetic acid, based on the crude, liquid vinyl acetate feed.