Method for recovery of ethylene in a recirculating gas process for the production of vinyl acetate

US7803965B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Willibald Dafinger · Zweibrücken, DE
• Peter Holl · Tübingen, DE
• Wilhelm Kaiser · Burghausen, DE
• Jürgen Guba · Burghausen, DE

Key dates

• Filing date: Mar 31, 2005
• Grant date: Sep 28, 2010
• Expiry date: Nov 18, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/055
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The efficiency of vinyl acetate production is increased by scrubbing of off gas followed by CO2 absorption. A portion of the off gas containing substantial quantities of ethylene is recycled to the process, whereas another portion is employed in another ethylene consuming reaction. Despite not removing non-reactive gases, selectivity and yield based on ethylene are both increased.