Process for preparing raw materials for washing agents
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsThomas Lueder, Konstantinos Scholinakis, Bernhard Gutsche, Christoph Breucker, Norbert Wrede
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Abstract
A process for producing solid detergent granular materials is presented involving (a) forming an aqueous surfactant paste of an anionic surfactant, an amphoteric surfactant or mixtures thereof, and (b) drying and granulating the aqueous paste in a horizontal thin-layer evaporator or dryer having rotating fittings, wherein the drying is carried out at a temperature of 120° C. to 130° C. The process produces granules having a bulk density greater than 600 grams/liter and a uniform particle size distribution.
Claims33
A process for producing solid detergent granules comprising simultaneously drying and granulating an aqueous surfactant paste comprising an anionic surfactant, an amphoteric surfactant or mixtures thereof in the presence of at least one of (a) from 0.05 to 1% by weight of an alkali metal carbonate, and (b) an alkaline gas stream, in a horizontal thin-layer evaporator or dryer having rotating fittings, wherein the drying is carried out at a temperature of from 120° C. to 130° C. and at atmospheric pressure.
A process for producing solid detergent granules comprising the steps of
- A) introducing an aqueous paste comprising an anionic surfactant, an amphoteric surfactant, or mixtures thereof into a horizontal thin-layer evaporator or dryer having rotating fittings;
- B) simultaneously drying and granulating the aqueous paste at a temperature in the range of 120 to 130° C. in the presence of at least one of (a) from 0.05 to 0.5% by weight of an alkali metal carbonate, and (b) an alkaline gas stream, wherein the drying process is carried out at atmospheric pressure and water is removed by a stream of gas;
- and
- C) removing the resulting dry solid detergent granules from the evaporator or dryer.
Dependencies are inferred from the claim text.