Albright & Wilson Limited

Robert B Lace

Brinley M Phillips

Alan J Lambie

The invention provides a process for reducing the diamide content of imidazolines having the formula: ##STR1## wherein R represents an aliphatic group having from at least 4 carbon atoms and R.sub.1 represents an alkyl or alkenyl group having from 1 to 4 carbon atoms. The mixture of imidazoline and diamide is reacted with a primary or secondary amine which deacylates the diamide to an amido-amine. The product of this deacylation is an imidazoline solution which remains clear even on prolonged storage. The imidazoline is produced by reaction of an acid RCOOH with a diamine NH.sub.2 (CH.sub.2).sub.2 NHR.sub.1. Preferably this diamine is used as the deacylating agent.

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Egremont, United Kingdom

Robert B Lace