Preparation of crystalline n-methylol-(meth) acrylamide

US5763665A · kind A · utility

Assignee

• BASF SE

Inventors

• Kaspar Bott · Mannheim, DE
• Thomas Domschke · Speyer, DE
• Michael Bohn · Rochester, US

Key dates

• Filing date: Jan 3, 1997
• Grant date: Jun 9, 1998
• Expiry date: Jan 3, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/182
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for the preparation of crystalline N-methylol(meth)acrylamide from (meth)acryamide and paraformaldehyde, the reaction of the solid reactants to give a product melt and the subsequent crystallization thereof in a reactor while subjecting the reaction mixture to mechanical shear load is preferably carried out in a self-purging screw reactor or a disk reactor. The reaction of the reactants and the crystallization of the product melt are preferably carried out without added solvent. A catalyst, in particular an alkali metal carbonate or a trialkylamine, can be used for the reaction of the reactants.