| 摘要 |
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing a dimethyl ether product by catalytic conversion of synthesis gas to dimethyl ether, involving contact of a stream of synthesis gas containing carbon dioxide, at a dimethyl ether synthesis step in one or more reactors, with one or more catalysts which are active in formation of methanol and dehydration of methanol to dimethyl ether to obtain a product mixture containing the components dimethyl ether, methanol, carbon dioxide and unreacted synthesis gas, washing the product mixture containing carbon dioxide and unreacted synthesis gas in a gas washing zone with a liquid solvent which is rich in potassium carbonate or amine, thereby selectively absorbing carbon dioxide from the liquid solvent. The obtained treated product mixture undergoes distillation to separate methanol and water from a stream of dimethyl ether and unreacted synthesis gas with low content of carbon dioxide and the unreacted synthesis gas is separated from the dimethyl ether product.EFFECT: method improves output of the process and final purification of the obtained dimethyl ether.6 cl, 1 ex, 3 tbl, 1 dwg |
