Hydrotreating of bottoms fractions resulting from conversion of methanol to gasoline in order to decrease durene and produce distillate
AssigneeMobil Oil Corporation
InventorsWilliam E. Garwood, Wooyoung Lee, Hans J. Schoennagel
Life of this patent
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Abstract
A durene-containing gasoline obtained from the catalytic conversion of methanol after removal of at least the light olefinic fraction is subjected to hydrotreating by contact with hydrogen over a hydrogenation metal on an acidic or non-acidic support.
Claims15
A process for decreasing the durene content of a 200.degree.-400.degree. F.+ bottoms fraction obtained from the catalytic conversion of methanol to gasoline which comprises contacting said durene-containing 200-400.degree. F.+ bottoms fraction with hydrogen at elevated temperatures and pressures over a supported hydrogenation metal catalyst for a period of time sufficient to decrease said durene and enhance the production of distillate.
In a process for the catalytic conversion of methanol to gasoline by contacting methanol with a crystalline aluminosilicate zeolite of the ZSM-5 type at elevated temperatures and pressures so as to obtain a durene-containing gasoline fraction, the improvement which comprises:
- (1) subjecting said durene-containing gasoline fraction to a distillation step so as to remove at least the light olefinic fraction and obtain a durene-containing bottoms fraction
- (2) hydrotreating said durene-containing bottoms fraction by contacting it with hydrogen over a hydrogenation metal supported catalyst at temperatures ranging from about 450.degree.-800.degree. F. and pressures ranging from about 50-3000 psig so as to decrease the durene content and enhance production of distillate.
Dependencies are inferred from the claim text.