Process for the production of surfactant-containing granulates
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United States of America Patent
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Oct 11, 1994
Grant Date -
N/A
app pub date -
Jun 21, 1991
filing date -
Oct 21, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Free-flowing granulates having an apparent density of 650 to 1,000 g/l and containing nonionic surfactants from the class of polyglycol ether derivatives and also finely divided, water-soluble and/or water-insoluble solids and water are prepared by mixing the nonionic surfactant with water, which may optionally contain part, but less than 50% by weight, of the total quantity of water-soluble or water-insoluble solids in dissolved or dispersed form, in a first mixing step (A) until a viscous gel phase has formed. The remaining main quantity of the water-soluble or water-insoluble solids are then added and mixed in solid, powder form in a second mixing phase (B) and the mixture is mechanically treated until granulates have formed and a maximum apparent density is reached. The ratio by weight of nonionic surfactant and water in the gel phase to total solids present (expressed as anhydrous substance) is from 25:75 to 65:35. Zeolites and bentonites are particularly suitable as the water-insoluble solids.
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