Using butenes to fractionate methanol from methyl-...

Details Using butenes to fractionate methanol from methyl-... Using butenes to fractionate methanol from methyl-...

C - Chemistry, Metallurgy

07

C

202/62, 260/648

C07C 41/42 (2006.01) C07C 41/06 (2006.01)

Patent

CA 1172200

Abstract of the Disclosure Butenes are added to the methanol-containing methyl-tertiary-butyl ether (MTBE) reactor effluent fractionation to effect recovery of substantially methanol-free MTBE bottoms product. Methanol analysis taken below the fractionator feed locus manipulates control of butenes addition. In an embodiment, the methanol-butenes-containing overhead stream from the fractionation is treated over activated alumina to adsorb methanol, yielding a methanol-free butanes feed for HF alkylation of isobutane. The used adsorbent can be regenerated using hot butenes product and/or MTBE reactor feed vapor with the recovered methanol being recycled to the MTBE reaction.

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