Process for removing contaminant metal ions from liquid streams using metallo germanate molecular sieves
US5667695A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | May 20, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B39/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a process for removing contaminant metal ions from a liquid stream. The process involves contacting the liquid stream with a crystalline molecular sieve having the pharmacosiderite structure and having germanium and M metals as framework elements. Optionally, titanium and silicon can also be framework elements. The M metals can be any metal which has octahedral coordination and has a valence of +2, +3, +4 or +5. Illustrative of these M metals are niobium, tin, antimony, aluminum, gallium and tantalum. These molecular sieves are particularly effective in removing cesium and strontium ions from aqueous streams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.