Feedstock preparation and conversion of oxygenates to olefins

Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed

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203 14, 203 18, 585408, 585469, 585639, 585733, C07C 120

Patent

active

047773219

ABSTRACT:
A process for converting crude aqueous methanol feedstock or the like to olefinic hydrocarbons in contact with a medium pore shape selective crystalline acid zeolite catalyst, wherein the improvement comprises contacting the aqueous methanol feedstock with a liquid propane-rich hydrocarbon extractant under liquid extraction conditions, recovering an aqueous phase containing the major amount of water introduced with the feedstock, recovering an organic extract phase comprising the hydrocarbon extractant and a portion of methanol introduced in the feedstock, and converting the extracted methanol at elevated temperature under catalytic reaction conditions to produce predominantly olefinic hydrocarbons.

REFERENCES:
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patent: 4014667 (1977-03-01), Barker
patent: 4025575 (1977-05-01), Chang et al.
patent: 4083888 (1978-04-01), Caesar et al.
patent: 4349415 (1982-09-01), DeFilippi et al.
patent: 4665237 (1987-05-01), Arakawa et al.
patent: 4665249 (1987-05-01), Mao et al.

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