Integration of OTO process with direct DME synthesis

Details Integration of OTO process with direct DME synthesis Integration of OTO process with direct DME synthesis

2011-08-23

2011-08-23

Singh, Prem C (Department: 1771)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

C585S324000, C585S326000, C585S327000, C585S329000, C585S634000, C585S640000, C585S910000, C518S718000, C422S186220

Reexamination Certificate

active

08003841

ABSTRACT:
Processes and systems for utilizing products from DME synthesis in converting oxygenates to olefins are provided that include removing a DME-reactor effluent from a DME reactor, wherein the DME effluent includes DME, water, and methanol; separating carbon dioxide gas from the DME reactor effluent in a liquid gas separator to produce a degassed effluent stream. The processes and systems can include feeding the degassed effluent stream to an oxygenate to olefin reactor to produce an olefin containing effluent, wherein the olefin containing effluent further includes oxygenates. Alternatively, the processes and systems can include providing the degassed effluent stream to a DME column to produce a DME feedstock and a solvent stream, wherein the solvent stream includes methanol and water; feeding the DME feedstock to an oxygenate to olefin reactor to produce an olefin containing effluent, wherein the olefin containing effluent further includes oxygenates; and contacting at least a portion of the olefin containing effluent with the solvent stream in a solvent contacting zone to produce an olefin containing raffinate stream and an oxygenate containing extract.

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