PROCEDURE TO RECOVER COBALT CARBONYLS EMPLOYED AS CATALYSTS IN PREPARING N-ACYL-ALPHA-AMINO ACIDS BY AMIDOCARBONYLATION.

摘要

The present invention object is a procedure to recover cobalt carbonyl used catalyst. According to which firstly is prepared, by adding acid, a water-soluble cobalt salt which is later on precipitated as cobalt hydroxide. Then, this cobalt hydroxide is reacted with N-acyl-alpha-amino acid, for the preparation of which cobalt carbonyl catalyst is provided, and obtained cobalt fusion is transformed in cobalt carbonyl catalyst, in presence of a mixture formed by carbon monoxide and hydrogen.