Manufacture of butynediol

US4093668A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Reiss · Ludwigshafen, DE
• Hans-Ingo Joschek
• Rudolf Schnur
• Siegfried Winderl
• Juergen Dehler · Forchheim, DE
• Herwig Hoffmann · Bischofswerda, DE

Key dates

• Filing date: Mar 19, 1974
• Grant date: Jun 6, 1978
• Expiry date: Mar 19, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/36
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Butynediol is prepared by reacting acetylene and formaldehyde in contact with a heavy metal acetylide as catalyst, in the liquid phase by the Reppe method. Acetylene is fed upwardly through a suspension of the catalyst in formaldehyde at such a rate that it is virtually completely consumed and a liquid zone containing no catalyst is formed above the suspension.