초록 ▼

Apparatus for reducing the amount of water in the feed to a methanol-to-gasoline (MTG) conversion reactor is described. The output products of a dehydration reactor and an aqueous methanol feed are supplied to a primary distillation tower or separator. A dimethylether (DME)/methanol mixture is taken

Apparatus for reducing the amount of water in the feed to a methanol-to-gasoline (MTG) conversion reactor is described. The output products of a dehydration reactor and an aqueous methanol feed are supplied to a primary distillation tower or separator. A dimethylether (DME)/methanol mixture is taken as overhead from the primary tower and can be sent to the MTG conversion reactor to produce hydrocarbons boiling in the gasoline range. Bottoms from the primary tower, containing methanol and water, are supplied to a secondary distillation tower or separator. A methanol stream is drawn as overhead from the secondary tower and is passed to an acid catalyzed dehydration reactor where an equilibrium mixture of dimethylether, methanol, and water is produced. The equilibrium mixture is passed from the dehydration reactor to the primary distillation tower. In preferred embodiments, the conversion reactor feed from the primary distillation tower may be of a gaseous or liquid phase.

대표청구항 ▼

CM,5. A continuous system comprising: (a) first distillation means; (b) second distillation means; (c) pressurized chemical reactor means containing dehydration catalyst; (d) methanol-to-gasoline conversion reactor means containing conversion catalyst; (e) means for passing a crude methanol feed con

CM,5. A continuous system comprising: (a) first distillation means; (b) second distillation means; (c) pressurized chemical reactor means containing dehydration catalyst; (d) methanol-to-gasoline conversion reactor means containing conversion catalyst; (e) means for passing a crude methanol feed containing a minor amount of water to an upper stage of the first distillation means; (f) means for maintaining said first distillation means at a pressure at least equal to the pressure of the pressurized chemical reactor means; (g) means for withdrawing dehydration product from pressurized chemical reactor means; (h) means for adding dehydration product to an intermediate stage of the first distillation means. (i) means for withdrawing from first distillation means a first overhead stream comprising essentially water-free dimethylether; (j) means for withdrawing from first distillation means a first bottoms stream containing aqueous methanol; (k) means for passing said dimethylether-containing first overhead stream from said first distillation means to methanol-to-gasoline conversion reactor means; (l) means for passing said first bottoms stream containing aqueous methanol from said first distillation means to said second distillation means; (m) means for withdrawing from second distillation means a second overhead stream comprising methanol; (n) means for withdrawing from second distillation means a second bottoms stream comprising water; (o) means for passing said second overhead methanol stream to pressurized chemical reactor means; and (p) means for recycling the dehydration product to an intermediate stage of the first distillation means.