Hydrocarbonylierung von Dimethyläther

摘要

The yield or selectivity of oxygenated acetyl compounds selected from ethylidene diacetate, acetic acid, acetic anhydride, acetaldehyde, and methyl acetate produced directly from synthesis gas, dimethyl ether and acetic acid in a catalyzed liquid phase reaction system is improved by the presence of carbon dioxide. When methanol is included in the reactor feed, the presence of carbon dioxide can significantly improve the molar selectivity to ethylidene diacetate. The catalyst comprises a Group VIII metal, methyl iodide, lithium iodide, and, optionally, lithium acetate.