Conversion of crude methanol to gasoline with extraction

Details Conversion of crude methanol to gasoline with extraction Conversion of crude methanol to gasoline with extraction

1987-04-29

1987-11-24

Pal, Asok

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

585408, 585469, 585733, 203 14, 203 18, 203DIG23, C07C 120

Patent

active

047091134

ABSTRACT:
A process for converting crude aqueous methanol feedstock to liquid hydrocarbons in contact witha medium pore shape selective crystalline acid zeolite catalyst, such as HZSM-5. In a preferred embodiment, the novel technique comprises the steps of: (a) contacting a crude methanol feedstock containing a minor amount of water with a liquid hydrocarbon extraction stream under extraction conditions favorable to selective extraction of the methanol, thereby providing an extract liquid stream rich in methanol and an aqueous raffinate stream lean in methanol; (b) charging the extracted methanol substantially free of water to said reaction zone under process conditions to convert substantially all methanol to hydrocarbons; (c) cooling reaction effluent to recover aqueous liquid byproduct stream, gas rich in C.sub.2.sup.- hydrocarbons, liquid rich in C.sub.3 -C.sub.4 and C.sub.5.sup.+ hydrocarbons; and (d) contacting crude methanol feedstock with at least a portion of the liquid hydrocarbons employed as extraction liquid.

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patent: 4665237 (1987-05-01), Arakawa et al.
patent: 4665249 (1987-05-01), Mao et al.

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