Color precursor removal from detergent range alkyl benzenes
US4433196A · kind A · utility
12Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Jun 25, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/917
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Extremely effective adsorbants are provided for removing color precursors from detergent range alkyl benzenes prior to sulfonation. The adsorbers provided are specific crystalline zeolites in a silica alumina matrix and bauxite clay having at least one material selected from the group consisting of ferric oxide, titanium dioxide and zirconium oxide which is activated by sulfuric acid then calcined to provide the effective adsorbant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.