Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Patent
1984-12-12
1986-05-06
Doll, John
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
422288, 422289, 422290, 585408, 585469, 585640, 585733, C07C 120
Patent
active
045873739
ABSTRACT:
Disclosed is a method and apparatus for the recovery and/or recycling of dimethylether (DME) during a methanol-to-chemical (MTC) conversion reaction. The hydrocarbon output is divided into liquid, vaporous and aqueous products. The liquid hydrocarbon products are reboiled to liberate dissolved DME and then provided as a liquid hydrocarbon product output. Vapor products resulting from the reboiling are combined with the vapor hydrocarbon stream and DME is removed therefrom in a DME absorber. The resultant vaporous hydrocarbons are passed out of the system as a product and the DME absorber materials recycled. In one embodiment, the DME absorber materials are methanol and water and these are combined with the aqueous liquid stream, stripped to reduce the water content, and resubmitted to the MTC reaction section for conversion. In another embodiment, water is the only DME absorber material and it is passed to a fractionator, separating and removing the DME product from the water which is subsequently combined with the aqueous liquid stream, stripped to increase methanol, DME concentration and provided as an input to the MTC reaction section.
REFERENCES:
patent: 4387263 (1983-06-01), Vogt et al.
Doll John
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Pal A.
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