Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1993-10-25
1995-05-23
Achutamurthy, P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
4232132, 4232137, 585820, 585822, 60297, 60311, B01D 5304, B01D 5334, C07C 712, F01N 300
Patent
active
054179475
ABSTRACT:
A method and system for removing low molecular weight olefins from gases generated during the first five minutes of start-up of an internal combustion engine. The mixture is contacted with hydrophilic material to remove at least some of the water therefrom. The hydrophilic material can be molecular sieve having pores large enough for adsorption of water molecules and small enough to prevent molecules larger than water from being adsorbed, high surface area aluminas, precursors for high surface area aluminas, high surface area silicas, and combinations thereof. The mixture is then contacted with a downstream hydrocarbon-removing agent for removing the olefins. The hydrocarbon-removing agent can be at least one molecular sieve which can be pentasil zeolites, faujasite zeolites, mordenite, beta zeolites, carbon molecular sieve, metallophosphates, aluminophosphates, silicoaluminophosphates, and combinations thereof.
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patent: 3067002 (1962-12-01), Reid
patent: 3699683 (1972-10-01), Tourtellette et al.
patent: 4631267 (1986-12-01), Lachman et al.
patent: 5078979 (1992-01-01), Dunne
patent: 5140811 (1992-08-01), Minami et al.
Hertl William
Lachman Irwin M.
Achutamurthy P.
Corning Incorporated
Quatrini L. Rita
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