Synthetic surfactant flakes and process for making them
US4534879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1984 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Jun 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for making improved synthetic surfactant flakes from a water-wet paste which is dried on a heated roll drum dryer. Hot surfactant flakes are made from drum drying a water-wet paste containing sodium alkyl sulfate (AS), sodium alkyl benzene sulfonate (LAS), and water-soluble inorganic salts, preferably sodium chloride and magnesium chloride blends. The hot flakes are cooled in a low moisture environment having a dewpoint of up to 10.degree. C., e.g., under a dry nitrogen or dry air blanket. The low moisture environment prevents undesirable, insidious hydration and stabilizes the AS/LAS flakes. The stable AS/LAS surfactant flakes can be used to make more economical, more processable, firmer improved surfactant cakes. One advantage is that cakes made with the flakes of this invention can contain larger amounts of perfume than cakes made with comparable AS/LAS flakes cooled above said dewpoint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.