Integrated process for oxygenated acetyl compounds from synthesis gas via dimethyl ether.

摘要

Ethylidene diacetate (27), acetic acid (10), acetic anhydride (30), and methyl acetate (30) are produced directly from synthesis gas (13) via the intermediate product stream (19) containing dimethyl ether. Dimethyl ether is produced from synthesis gas (13) in a first liquid phase reactor (201) and the reactor effluent (19) comprising dimethyl ether, methanol, and unreacted synthesis gas flows to a second liquid phase reactor (301) containing acetic acid in which the oxygenated acetyl compounds are synthesized catalytically. Vinyl acetate (41) and additional acetic acid (39) optionally are produced by pyrolysis of ethylidene diacetate in a separate reactor system (401). Synthesis gas (13) is preferably obtained by partial oxidation (101) of a hydrocarbon feedstock (1) such as natural gas. Optionally, a portion (9) of the acetic coproduct is recycled to the partial oxidation reactor (101) for conversion into additional synthesis gas (13).