Process for direct etherification of a dehydrogenation zone...

Details Process for direct etherification of a dehydrogenation zone... Process for direct etherification of a dehydrogenation zone...

C - Chemistry, Metallurgy

07

C

260/648

C07C 41/06 (2006.01) C07C 43/04 (2006.01)

Patent

CA 1337943

Dehydrogenation of C3-C5 paraffins is integrated with conversion of the resulting olefins to ether to improve efficiency for ether production by directly charging all but the lightest components of the dehydrogenation zone effluent to the etherification zone. A particularly preferred arrangement of this invention uses an etherification zone for direct production of MTBE from the dehydrogenation zone effluent and two fractionation columns to yield an overhead stream of light ends (C1 to C3) and of oxygenates, a stream of recycle isoparaffins, recycle methanol, and a product stream of MTBE. The arrangement also simplifies the removal of undesired oxygen-containing compounds such as H2O and DME from the recycle paraffin stream to the dehydrogenation step by allowing the use of only a depropanizer to remove both oxygenates and light ends without the additional cost of a separate oxygenate recovery unit.

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