The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2012
Filed:
Mar. 31, 2009
Huig Euser, Vlaardingen, NL;
Jean-paul Janssens, Vlaardingen, NL;
Robert Jan Moll, Vlaardingen, NL;
Jerome Georges M. Sonjon, Vlaardingen, NL;
Huig Euser, Vlaardingen, NL;
Jean-Paul Janssens, Vlaardingen, NL;
Robert Jan Moll, Vlaardingen, NL;
Jerome Georges M. Sonjon, Vlaardingen, NL;
Conopco, Inc., Englewood Cliffs, NJ (US);
Abstract
The present invention concerns a process for the preparation of free flowing granules of low hygroscopicity of one or more methylglycine diacetic acid (MGDA) salts, of the formula wherein R═CH3 and M is hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium in the appropriate stoechiometric amounts, by a process comprising the steps of i) heating a concentrated slurry comprising methylglycine diacetic acid (MGDA) and/or any salts thereof, the slurry having a solids content in the range of 45% to 70% and suitably in the range from 50% to 70%, and a moisture content of 30% up to 55%, and suitably between 30% and 50%, to a temperature in the range of 50 to 120° C., preferably to about 80° C., and ii) spray granulating said slurry, using an air inlet temperature of 120° C. or less.