Process for the production of surfactant-containing granulates
US5354493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1991 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Jun 21, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/065
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.