Multi-stage system for converting oxygenates to liquid hydrocarb

Details Multi-stage system for converting oxygenates to liquid hydrocarb Multi-stage system for converting oxygenates to liquid hydrocarb

1986-01-31

1987-08-25

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422140, 422141, 422190, 585312, C07C 120

Patent

active

046892052

ABSTRACT:
An apparatus for converting oxygenated feedstock, such as methanol, dimethyl ether or the like, to liquid hydrocarbons. In the primary catalyst stage the feedstock is contacted with a fluidized zeolite catalyst to produce C.sub.2 -C.sub.4 olefins and C.sub.5.sup.+ hydrocarbons. In a secondary catalytic stage with oligomerization catalyst comprising medium-pore shape selective acidic zeolite at increased pressure converts C.sub.3.sup.+ olefins to gasoline and/or distillate liquids. A portion of the recovered gasoline stream is recycled to the fluidized bed at a point above the bed stratum corresponding to substantially complete oxygenate conversion.

REFERENCES:
patent: 4058576 (1977-11-01), Chang et al.
patent: 4211640 (1980-07-01), Garwood et al.
patent: 4423274 (1983-12-01), Daviduk et al.
patent: 4433185 (1984-02-01), Tabak
patent: 4456779 (1984-06-01), Owen et al.

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