Process for the preparation of 2-chlorobuta-1,3-diene

US4104316A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Scharfe · Leverkusen, DE
• Rupert Wenzel · Leverkusen, DE

Key dates

• Filing date: Jul 6, 1976
• Grant date: Aug 1, 1978
• Expiry date: Jul 6, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/25
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the production of 2-chlorobuta-1,3-diene (chloroprene) which comprises reacting 3,4-dichlorobut-1-ene and sodium butylate in n-butanol to produce a reaction mixture containing the 2-chlorobuta-1,3-diene and sodium chloride in the n-butanol with the sodium chloride being a suspended solid. The reaction mixture is distilled in a distillation column to separate the 2-chlorobuta-1,3-diene as top product and n-butanol having the sodium chloride suspended therein as sump product. The reaction can be performed in the distillation column.