Process for the preparation of dimethylether from hydrocarbons

Details Process for the preparation of dimethylether from hydrocarbons Process for the preparation of dimethylether from hydrocarbons

2007-05-01

2007-05-01

Parsa, J. (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S702000, C518S703000, C518S704000, C518S713000, C518S714000, C518S715000

Reexamination Certificate

active

11450580

ABSTRACT:
Disclosed herein is a process for the preparation of dimethylether from hydrocarbons, including tri-reforming a feedstock mixture comprised of hydrocarbons, carbon dioxide and water vapor in the presence of a tri-reforming catalyst, to prepare a syngas, which then undergoes gas-phase direct synthesis into dimethylether in one step in the presence of a hybrid catalyst. According to the process of this invention, three main processes among typical syngas preparation processes are simultaneously performed, and then, the syngas thus obtained is prepared into dimethylether through a direct reaction in one step, thereby decreasing the apparatus cost and operation cost. In addition, all of the carbon dioxide separated and recovered from the unreacted material and by-products may be reused as reaction material, thus decreasing the generation of carbon dioxide and reducing the material cost.

REFERENCES:
patent: 6800665 (2004-10-01), Shikada et al.

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