Process to prepare methanol and/or dimethylether

Details Process to prepare methanol and/or dimethylether Process to prepare methanol and/or dimethylether

2009-01-20

2011-12-27

Toomer, Cephia D (Department: 1771)

Fuel and related compositions

Coal treating process or product thereof

C568S671000, C568S910000

Reexamination Certificate

active

08083815

ABSTRACT:
A process to prepare methanol and/or dimethylether from a solid carbonaceous feedstock comprising the steps of(a) feeding an oxygen-comprising gas and the carbonaceous feedstock to a burner firing into a reactor vessel,(b) performing a partial oxidation of the carbonaceous feedstock in said burner to obtain a stream of hot synthesis gas and a liquid slag whereby both the hot synthesis gas and the liquid slag flow downwardly relative to the burner,(c) cooling the hot synthesis gas by direct contact with a liquid water-containing cooling medium,(d) performing a water shift reaction on at least part of the synthesis gas, to obtain a synthesis gas effluent,(e) performing an oxygenate synthesis using the synthesis gas effluent of step (d), to obtain a methanol and/or dimethylether containing oxygenate effluent and a first liquid water-rich by-product,wherein at least part of the first liquid water-rich by-product is used in step (c), forming at least part of the liquid water-containing cooling medium.

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