Edds adduct compositions
AssigneeInnospec Limited
InventorMatthew Robert GILES
Life of this patent
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Abstract
An adduct of ethylenediamine disuccinic acid or a salt thereof and a further polycarboxylic acid or a salt thereof wherein the further polycarboxylic acid is selected from citric acid, polyaspartic acid, tartaric acid, malonic acid, maleic acid, carboxymethyl inulin, oxalic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, malic acid and fumaric acid; and wherein said adduct is in the form of a free flowing particulate solid; wherein EDDS is present in the adduct in a molar excess compared with the further polycarboxylic acid.
Claims21
An adduct of ethylenediamine disuccinic acid or a salt thereof and a further polycarboxylic acid or a salt thereof wherein the further polycarboxylic acid is selected from citric acid, polyaspartic acid, tartaric acid, malonic acid, maleic acid, carboxymethyl inulin, oxalic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, malic acid and fumaric acid;
- and wherein said adduct is in the form of a free flowing particulate solid;
- wherein EDDS is present in the adduct in a molar excess compared with the further polycarboxylic acid.
A method of preparing an adduct of ethylenediamine disuccinic acid or a salt thereof and a further polycarboxylic acid or a salt thereof wherein the further polycarboxylic acid is selected from citric acid, polyaspartic acid, tartaric acid, malonic acid, maleic acid, carboxymethyl inulin, oxalic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, malic acid and fumaric acid, the method comprising:
- (i) admixing a composition comprising ethylenediamine disuccinic acid or a salt thereof with a composition comprising the further polycarboxylic acid or a salt thereof wherein EDDS is provided in a molar excess compared with the further polycarboxylic acid;
- and
- (ii) collecting the adduct in the form of a free flowing particulate solid.
A method of manufacturing a detergent composition, the method comprising:
- admixing an aqueous solution of EDDS or a salt thereof and an aqueous solution of a further polycarboxylic acid or a salt thereof wherein EDDS is provided in a molar excess compared with the further polycarboxylic acid;
- optionally adjusting the pH of the resultant mixture;
- collecting the precipitate that forms;
- and
- admixing the precipitate with one or more further components.
Dependencies are inferred from the claim text.