Process for manufacture of detergent powder
AssigneeLever Brothers Company
InventorsElfed H. Evans, Klaus Hirte, Gerd Stremmel
Life of this patent
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Abstract
A process for manufacturing detergent powder containing heat-sensitive components is disclosed. The process involves preparation of two separate crutcher slurries, one containing the relatively heat-stable components which is sprayed in a conventional manner and a second containing heat-sensitive components which is sprayed into the spray-drying tower at a level lower than the level at which the drying air is injected. Desirably the second slurry is sprayed in a direction which includes an upward component, so as to lengthen the pathway of the sprayed droplets.
Claims8
A process for the manufacture of a detergent powder containing a heat-sensitive component which comprises:
- (a) forming a first aqueous crutcher slurry and spraying it from a first upper level downwardly into a spray-drying tower;
- (b) passing drying gas into the spray-drying tower from a second lower level;
- (c) forming a second aqueous slurry and spraying it into the spray-drying tower at a third level, lower than the second slurry;
- characterised in that the heat-sensitive component is incorporated in the second slurry.
Dependencies are inferred from the claim text.