Production of anionic surfactant granules by in situ neutralisation
US6518234B2 · kind B2 · utility
1Cited by
7References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D11/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the production of detergent particles, comprises feeding an acid precursor of an anionic surfactant and a neutralising agent into a horizontal thin-film evaporator/drier comprising a mixing region, a drying region and a cooling region. The resultant detergent particles are graded to separate an oversize granule fraction in which at least 70 wt % of the particles have a minimum diameter of 1000 &mgr;m. This fraction is fed back into the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.