US2005217816A1PendingUtilityA1

Storage-stable iminodisuccinate solutions

Assignee: MITSCHKER ALFREDPriority: Mar 16, 2004Filed: Mar 14, 2005Published: Oct 6, 2005

Est. expiryMar 16, 2024(expired)· nominal 20-yr term from priority

Inventors:Alfred Mitschker Holger Schmidt Ralf-Johann Moritz Paul Wagner Rolf Feller

C07C 227/44C07C 227/40

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Claims

Abstract

The present invention relates to a process for the preparation of storage-stable iminodisuccinate solutions, by subjecting an aqueous solution of iminodisuccinate having an ammonia content of less than 20 ppm to thermal treatment at 40 to 120° C. for 5 hours up to 300 days and subsequent distillation at <120° C.

Claims

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1 . Process for the preparation of storage-stable solutions of iminodisuccinate having an ammonia content of &lt;50 ppm, characterized in that iminodisuccinate solutions having an ammonia content greater than 50 ppm are thermally treated at 40 to 120° C. for 5 hours up to 300 days and are then subjected to a distillation at temperatures &lt;120° C.  
   
   
       2 . Process according to  claim 1 , characterized in that the thermal treatment is carried out at 80 to 115° C.  
   
   
       3 . Use of the storage-stable iminodisuccinate solutions prepared according to  claim 1  for cosmetics, laundry detergents, cleaning compositions, domestic cleaning, in paper manufacture, in bleaching processes and in textile treatment.

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