Production of detergent compositions
AssigneeLever Brothers Company
InventorsGert Becker, Johann U. Oesch, Horst Poeselt, Alan D. Tomlinson, Kurt Walz
Life of this patent
Estimating the term…
Abstract
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.
Claims15
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.
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.
A method of reducing inorganic deposits in washing machines comprising the steps of adding an effective amount of a particulate alkaline detergent composition to the washing machine to form a wash solution, washing fabrics in said wash solution and then draining the wash solution from the washing machine after the completion of the washing process;
- said particulate alkaline detergent composition containing at least about 5% by weight of a synthetic detergent active compound or mixture thereof, at least about 5% of an alkali metal tripolyphosphate;
- about 3% to about 10% of an alkali metal orthophosphate with a total amount of 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.
Dependencies are inferred from the claim text.