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AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsVolker Bauer, Wilfried Raehse, Andreas Syldath, Ditmar Kischkel
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The invention concerns a method of converting aqueous surfactant mixtures, in particular aqueous pastes of surfactants with washing properties such as fatty-alcohol sulphates, in particular tallow alcohol sulphates and/or C.sub.12 -C.sub.18 fatty-alcohol sulphates, monosalts of sulphonic fatty-acid methyl esters and their di-salts, alkylglusoside compounds, etc., into concentrated granular material with a long shelf life by granulation. The aqueous surfactant mixture, which includes as a viscosity-control agent alkoxylates of mono- and/or polyhydric alcohols with 8-40 carbon atoms which have up to 20 ethylene oxide and/or propylene oxide groups, is granulated together with fine-particulate water-soluble and/or water-insoluble solids compatible with washing and/or cleaning agents to give a free-running compound. At least part of the water content of the granular material thus produced is preferably then removed by drying, in particular in a fluidized bed.
A process for the production of surfactant granules which comprises mixing a water-containing surfactant paste with one or more water soluble or water insoluble solids to directly form granules comprised of at least about 20% by weight of surfactant, wherein said water-containing surfactant paste is comprised of an anionic surfactant or an alkyl glycoside or a combination thereof and a viscosity regulator selected from the group consisting of an ethoxylated or propoxylated C.sub.10-20 monohydric alcohol having a degree of alkoxylation of up to 20, an ethoxylated or propoxylated C.sub.8-40 polyhydric alcohol having a degree of alkoxylation of up to 20, and mixtures thereof.
The process of claim 12 wherein said viscosity regulator is a C.sub.10-20 monohydric alcohol having a degree of ethoxylation of from about 2 to about 10.
Dependencies are inferred from the claim text.