Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Patent
1982-05-14
1983-06-07
Gantz, Delbert E.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
585639, C07C 124
Patent
active
043872638
ABSTRACT:
The disclosure relates to a process for making C.sub.2 to C.sub.4 -olefins from gas mixtures containing methanol, dimethylether and optionally steam in the presence of catalysts at temperatures of 250.degree. to 500.degree. C. under pressure of 0.1 to 6 bars, unreacted feed material being recycled. To this end, the disclosure provides for a mixture containing methanol and water in a ratio by volume of 1:(0 up to 2) to be evaporated and reacted in a reactor having the catalyst placed therein; for the reaction gases to be partially condensed by cooling them and separated, in a separator, into three phases; for the oil phase consisting of higher aliphates and aromates to be removed and for the remaining aqueous phase and gas phase to be water-scrubbed in a scrubbing column under pressures of 1 to 40 bars; for a gaseous hydrocarbon mixture containing predominantly C.sub.2 to C.sub.4 -olefins to be removed overhead and separated into its components; for an aqueous phase containing unreacted methanol and intermediarily formed dimethylether to be removed from the base portion of the scrubbing column; for the methanol and dimethylether to be distilled off in a stripping column and recycled into the reactor; and for the water to be removed from the base portion of the stripping column.
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Glaser Hermann
Koch Jurgen
Vogt Wilhelm
Gantz Delbert E.
Hoechst Aktiengesellschaft
Prezlock Cynthia A.
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