Method for the separation of polymeric by-products from 1,4-butynediol

US7605292B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rudolf Erich Lorenz · Ludwigshafen, DE
• Rolf Pinkos · Bad Dürkheim, DE
• Michael Steiniger · Neustadt, DE
• Gerd Schaefer · Monsheim, DE
• Thomas Danner · Erpolzheim, DE

Key dates

• Filing date: Jan 9, 2009
• Grant date: Oct 20, 2009
• Expiry date: Jan 9, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/172
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol.