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US 6,992,052 B2Granted
Process of preparing in-situ water-soluble zinc salt for use in automatic dishwashing compositions
AssigneeThe Procter & Gamble Company
InventorBrian Xiaoqing Song
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Abstract
A process for preparing in-situ water-soluble zinc salts for use in automatic dishwashing compositions is disclosed.
Claims21
A process for preparing an in-situ water-soluble zinc salt for use as a base or additive in preparing an automatic dishwashing composition, said process comprising the steps of:
- a) dispersing zinc oxide in water;
- b) combining an acid with said zinc oxide/water mixture;
- c) mixing said zinc oxide/water mixture and said acid until said zinc oxide is at least partially dissolved;
- d) maintaining said zinc oxide/water/acid mixture within an acidic pH range;
- and
- e) combining said zinc oxide/water/acid mixture with at least one rinse aid ingredient to form a rinse aid composition;
- wherein the order of addition of said process steps (a) and (b) is not critical.
4 more elements
A process for preparing an in-situ water-soluble zinc salt for use as a base or additive in preparing an automatic dishwashing composition, said process comprising the steps of:
- a) dispersing zinc oxide in water;
- b) combining an acid with said zinc oxide/water mixture;
- wherein said acid is selected from the group consisting of acetic acid, aspartic acid, benzoic acid, boric acid, bromic acid, formic acid, glutamic acid, hydrochloric acid, lactic acid, malic acid, nitric acid, sulfamic acid, sulfuric acid, tartaric acid, and mixtures thereof;
- c) mixing said zinc oxide/water mixture and said acid until said zinc oxide is at least partially dissolved;
- and
- d) combining said zinc oxide/water/acid mixture with at least one detergent ingredient to form a detergent composition.
3 more elements
Dependencies are inferred from the claim text.