Filter element with porous nickel-based alloy substrate and metal oxide membrane
US6432308B1 · kind B1 · utility
4Cited by
11References
6Claims
0Family size
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Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Sep 25, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Powdered nickel-based alloys having substantial amounts of chromium and molybdenum are molded and sintered to form tubular filter supports. Metal oxide particulates, preferably titanium oxide, are impregnated into the interior surfaces of the tubular elements and sintered to create 0.1 micron filter membranes. Hastelloy C-22 is a preferred nickel-based alloy for forming the porous metal support, while rutile is preferred as a starting material for forming the filter membrane. The resultant porous metal/metal oxide filter elements have superior resistance to chemical attack in high chloride, low pH environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.