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Production of detergent compositions
| Details |
Inventors: Becker, Gert; Oesch, Johann U.; Poeselt, Horst; Tomlinson, Alan D.; Walz, Kurt;
Assignee: Lever Brothers Company (New York, NY)
Primary Examiner: Albrecht; Dennis L.
Assistant Examiner:
Attorney, Agent or Firm: Kurtz; Melvin H.
Particulate alkaline detergent compositions for fabric washing, which include synthetic detergent compounds and alkali metal tripolyphosphate and alkali metal orthophosphate detergency builders, are made by spray-drying a detergent base powder containing some or all of the detergent compounds and some or all of the orthophosphate and admixing at least 2.5% by weight of the tripolyphosphate in particulate form with the spray-dried base powder. |
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DETAILED DESCRIPTION What is claimed is: 1.
A process for preparing a particulate alkaline detergent composition which contains at least about 5% by weight of a synthetic detergent active compound or mixture thereof, at least about 5% of an alkali metal tripolyphosphate and about 3% to about 10% of an alkali metal orthophosphate with a total amount of the tripolyphosphate and orthophosphate of from about 15% to about 25% by weight and no more than 2.
5% by weight of alkali metal pyrophosphate, comprising the steps of spray drying a detergent base powder containing some or all of the detergent active compound or compounds and some or all of the alkali metal orthophosphate, and admixing at least about 5% by weight of the alkali metal tripolyphosphate in particulate form with the spray dried base powder, with the remainder if any of the alkali metal tripolyphosphate being spray-dried in the base powder, the percentages being based on the total composition.
2.
A process according to claim 1, wherein the alkali metal tripolyphosphate is sodium tripolyphosphate.
3.
A process according to claim 1, wherein at least about half of the alkali metal tripolyphosphate is admixed with the spray dried base powder.
4.
A process according to claim 1, wherein the alkali metal orthophosphate is monosodium dihydrogen orthophosphate, disodium monohydrogen orthophosphate or trisodium orthophosphate, or a mixture thereof.
5.
A process according to claim 1, wherein not more than about 5% by weight of alkali metal pyrophosphate is present in the composition.
6.
A process according to claim 1, wherein from about 2% to about 20% by weight of soap is incorporated in the composition.
7.
A process according to claim 6, wherein the soap is added in the spray dried base powder.
8.
A process according to any of the preceding claims, wherein from about 0.
1% to about 5% by weight of an antideposition agent is incorporated into the composition.
9.
A process according to claim 8, wherein the antideposition agent is a polymeric aliphatic carboxylate
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