Purification of n-vinylformamide

US4814505A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Kroener · Mannheim, DE
• Willi Schmidt · Ludwigshafen, DE
• Alfred Oftring · Bad Dürkheim, DE
• Theo Proll · Bad Dürkheim, DE
• Heinrich Hartmann · Schifferstadt, DE

Key dates

• Filing date: Jan 29, 1987
• Grant date: Mar 21, 1989
• Expiry date: Jan 29, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C233/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-Vinylformamide is purified by fractional distillation in the presence of formamide in a column under from 0.5 to 30 mbar by a method in which the distillation is controlled so that N-vinylformamide containing from 0.1 to 15% by weight of formamide is obtained as the distillate. Homopolymers having particularly high molecular weights can be prepared from the N-vinylformamide purified in this manner.