Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce unsaturate
Patent
1985-01-17
1985-09-24
Gantz, D. E.
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
To produce unsaturate
422188, 585312, 585314, 585315, 585316, 585324, 585327, 585640, 585469, 585733, C07C 500
Patent
active
045434352
ABSTRACT:
A process for converting oxygenated feedstock comprising methanol, dimethyl ether or the like to liquid hydrocarbons comprising the steps of
contacting the feedstock with zeolite catalyst in a primary catalyst stage at elevated temperature and moderate pressure to convert feedstock to hydrocarbons comprising C.sub.2 -C.sub.4 olefins and C.sub.5.sup.+ hydrocarbons;
cooling and separating effluent from the primary stage to recover a liquid hydrocarbon stream and a light hydrocarbon vapor stream rich in C.sub.2 -C.sub.4 olefins;
compressing the olefinic light hydrocarbon stream to condense a liquid olefinic hydrocarbon stream rich in C.sub.3.sup.+ olefins and recovering an ethene-rich gaseous stream;
further pressurizing and contacting the condensed liquid olefinic hydrocarbon stream in a secondary catalytic stage with oligomerization catalyst comprising medium-pore shape selective acidic zeolite at substantially increased pressure and moderate temperature to convert at least a portion of olefins to a heavier liquid hydrocarbon product stream comprising olefinic gasoline and distillate range liquids; and
recovering ethene in a gaseous stream for recycle to the primary catalytic stage.
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"Production of Chemicals from Methanol", Warren W. Kaeding and Stephen A. Butter Journal of Catalysis, vol. 61, No. 1, Jan. 1980.
"Conversion of Methanol to Hydrocarbons", Margaret M. Wu and Warren W. Kaeding, Journal of Catalysis 88, 478-489, (1984).
Gould Ronald M.
Tabak Samuel A.
Gantz D. E.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Pal A.
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