Heavy metal removal system containing clay, quaternary ammonium compound, and mercaptan
US5512526A · kind A · utility
20Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Metal ions can be removed from aqueous by being brought into contact with a heavy metal removal system which comprises an expanded organophilic clay (such as montmorillonite), a fatty alkyl-containing quaternary ammonium compound (such as a chloride comprising a fatty alkyl group containing from about twelve to about twenty-two carbon atoms), and a fatty alkyl-containing mercaptan (comprising a fatty alkyl group containing from about twelve to about twenty-two carbon atoms).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.