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| Number | Title | Issue Date |
| 4980137 | Process for NOx and CO control An improved process is described for reducing the levels of nitrogen oxides and carbon monoxide present in flue gases. The process consists of preparing a bed of expanded vermiculite, expanded perlite, or borosilicate glass wool and passing a flue gas con... | 12/25/1990 |
| 4829036 | Regeneration process for spent SO2 -NOX sorbents A process is disclosed for regenerating spent MgO-vermiculite and MgO-perlite sorbents, where the sorbents have been employed beforehand to remove sulfur and nitrogen oxides from flue gases. The regeneration process consists of a series of heating and coo... | 05/09/1989 |
| 4806320 | Process for Nox control A process is described for reducing the levels of nitrogen oxides present in flue gases from stationary sources. The process consists of mixing ammonia or methane with the flue gas and then passing the mixtures through a bed of expanded vermiculite, the l... | 02/21/1989 |
| 4786484 | Process for absorbing toxic gas A process for absorbing noxious components such as SOx, NOx, and HX from a gas such as a flue gas at temperature below 250° C. is improved by contacting the gas with a conditioned solid acceptor that contains divalent metal oxide, h... | 11/22/1988 |
| 4721582 | Toxic gas absorbent and processes for making same Solid sorbents (acceptors) for noxious components, e.g. SOx, NOx and HX, from gases below about 250°, specifically acceptors that contain hydrated divalent metal oxide coated onto an exfoliated or expanded mineral support, are impro... | 01/26/1988 |
| 4711718 | Ion-selective water filter A filter is disclosed for treating drinking waters contaminated with lead or, alternately, lead and copper. The filter is made an effective extractor of toxic lead or copper by incorporating a particulate chelating agent having substantial selectivity for... | 12/08/1987 |
