Method for purifying waste water using surface modified silica
US5137639A · kind A · utility
9Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | May 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a process for preparing surface modified silica sorption agent suitable for purifying contaminated aqueous liquid, the sorption agent comprising amorphous, precipitated, silica having surface deposited thereon an organic quaternary ammonium compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.