Dry scrubbing air filtration media
US8247346B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2010 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Mar 18, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A solid air filtration medium includes an impregnate with an organic amine and an inorganic metal salt. The medium has from about 0.1 to about 25% by weight of impregnate. The impregnate contains from about 0.1 to about 5% by weight organic amine, and the organic amine includes aqueous urea, solid urea, melamine or mixtures thereof. The impregnate contains from about 0.1 to about 5% by weight metal salt, and the metal salt includes magnesium oxide, calcium oxide or mixtures thereof. The impregnate optionally further includes a surfactant such as polyacrylic acid. Methods for forming a solid air filtration medium having an impregnate containing an organic amine and an inorganic metal salt and methods for removing contaminants from a fluid stream are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.