Preparation on an O-alkylisourea

US6252103A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Kluge · Ludwigshafen, DE
• Knut Kessel · Mannheim, DE
• Thomas Greindl · Bad Dürkheim, DE
• Norbert Biedermann · Bad Dürkheim, DE
• Günter Scherr · Ludwigshafen, DE
• Thomas Bogenstätter · Bad Dürkheim, DE

Key dates

• Filing date: Nov 15, 1999
• Grant date: Jun 26, 2001
• Expiry date: Nov 15, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C273/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of an O-alkylisourea of the formula I, ##STR1## where R.sup.1 is C.sub.1 - to C.sub.20 -alkyl, in the form of an acid addition salt, in which urea and an alkyl-transferring reagent, if required dissolved or suspended in a diluent, are reacted at 40-200.degree. C. in a continuously operated reactor, is described. The diluent is preferably a recycled part-stream of the O-alkylisourea acid addition salt obtained.