US 10,865,362 B2 · Process for manufacturing MGDA/GLDA granules, granules, and their use

Abstract

Process for manufacturing granules of salts of at least two aminopolycarboxylic acids (A), com-prising the steps of (a) providing an aqueous solution of (A1) at least one alkali metal salt of a mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA), said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 10 to 95%, (A2) at least one alkali metal salt of L- and D-enantiomers of glutamic acid diacetic acid (GLDA) or of enantiomerically pure L-GLDA, the weight ratio of (A1) and (A2) being in the range of from 1:9 to 9:1, (b) spray granulating said solution with a gas inlet temperature of at least 125° C. Additionally, the present invention relates to granules and to their use.

Claims21

Dependent claims

A process for manufacturing granules of salts of at least two aminopolycarboxylic acids (A), the process comprising:

spray granulating, with a gas inlet temperature of at least 125° C., an aqueous solution comprising (A1) an alkali metal salt of a mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA), the mixture comprising predominantly the L-enantiomer with an enantiomeric excess (ee) in a range of from 10 to 95%, and (A2) an alkali metal salt of a mixture of L- and D-enantiomers of glutamic acid diacetic acid (GLDA) or of enantiomerically pure L-GLDA,
wherein a weight ratio of (A1) and (A2) is in a range of from 1:9 to 9:1.

Dependencies are inferred from the claim text.

Process for manufacturing MGDA/GLDA granules, granules, and their use

Life of this patent

Process for manufacturing MGDA/GLDA granules, granules, and their use

Life of this patent

Abstract

Claims21