Heavy metal removal process
US4908137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ion-exchange media comprising a modified polysaccharide material and a modified silica material, said modified materials comprising a polysaccharide and silica materials covalently bonded to a synthetic polymer, said synthetic polymer comprising a copolymer made from a polymerization of: PA1 (a) a polymerizable compound having a chemical group capable of covalently coupling, directly or indirectly, to said materials; and PA1 (b) a polymerizable compound containing (i) an ionizable chemical group or (ii) a chemical group capable of transformation to an ionizable chemical group. The media is used to selectively remove heavy metal contaminants from aqueous solutions containing said contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.