Ion exchange of metals from aqueous solutions using compositions of synthetic resins reacted with polyisocyanurate salts
US4039485A · kind A · utility
7Cited by
8References
10Claims
0Family size
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Key dates
| Filing date | Jul 7, 1975 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Jul 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Metals can be removed from aqueous solutions by contacting such solutions with a composition formed by reacting polyisocyanurate salts with synthetic resins. The resulting composition contains polyisocyanurate salt groups which act as exchange sites for removing the metals from solution. Regeneration by treatment with suitable inorganic metal salts and use of chloromethylated synthetic resins in the forming of the polymer are utilized in preferred embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.