Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1996-05-02
1997-11-18
Caldarola, Glenn A.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
208208R, 208236, 208237, 208240, 208255, 208242, 585864, 585857, C07C 710
Patent
active
056890338
ABSTRACT:
A process is directed to the removal of impurities such as sulfur compounds, oxygenates, and/or olefins from a light paraffin hydrocarbon feedstock such as a C.sub.4 -C.sub.6 fraction, which may be used subsequently in an isomerization process in an integrated complex for the production of ethers such as MTBE and TAME. The hydrocarbon feedstream is passed to a removal zone wherein the hydrocarbon feedstream is contacted with a selective solvent for the removal of the impurities comprising at least one of sulfur compounds, oxygenates and olefins to provide a rich solvent stream and a treated hydrocarbon stream. The rich solvent comprising the trace impurities is contacted with a stripping medium stream to regenerate the selective solvent in a stripping zone. The removal zone may be a liquid-liquid extraction zone or a gas absorption zone. The selective solvent comprises a water miscible organic liquid having a low molecular weight preferably less than about 400 and more preferably having a molecular weight of less than about 200. The process is particularly useful in removing impurities such as sulfur, oxygenates and/or olefins which are harmful to the isomerization catalyst. The process replaces separate olefins, oxygenate, and sulfur removal processes resulting in simplified processing schemes.
REFERENCES:
patent: 2720547 (1955-10-01), Wolff et al.
patent: 3726942 (1973-04-01), Louder
patent: 4081354 (1978-03-01), Christman
patent: 4118425 (1978-10-01), Herbstman
patent: 4204077 (1980-05-01), Woods et al.
patent: 4218569 (1980-08-01), Chase et al.
patent: 4219678 (1980-08-01), Obenaus et al.
patent: 4252541 (1981-02-01), Herbstman
patent: 4329516 (1982-05-01), Al-Muddarris
patent: 4447653 (1984-05-01), Vora
patent: 4556461 (1985-12-01), Ogura et al.
patent: 4558168 (1985-12-01), Gussow et al.
patent: 4626341 (1986-12-01), Verachtert
patent: 4686317 (1987-08-01), Quann et al.
patent: 4754078 (1988-06-01), Vora et al.
patent: 4816607 (1989-03-01), Vora et al.
patent: 4906788 (1990-03-01), Scott et al.
patent: 5085740 (1992-02-01), Lee et al.
patent: 5122236 (1992-06-01), Smith, Jr. et al.
patent: 5237115 (1993-08-01), Makovec et al.
patent: 5260493 (1993-11-01), Harandi et al.
patent: 5569788 (1996-10-01), Forte et al.
patent: 5582714 (1996-12-01), Forte
Stinson, Stephen C., "New Plants Processes Set for Octane Booster," Chemical and Engineering News, Jun. 25, 1979, pp. 35-36.
Obernaus et al., "Huels-Process: Methyl Tertiary Butylether." paper presented at The American Institute of Chemical Engineers, 85th National Meeting, Jun. 4-8, 1978.
"Modern Petroleum Technology," Edited by Hobson et al., pp. 334, 1973.
Forte Paulino
Frey Stanley J.
Caldarola Glenn A.
McBride Thomas K.
Preisch Nadine
Silverman Richard P.
Tolomei John G.
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