| 摘要 |
Process for the preparation of acetic acid comprising the steps of: providing a feed stream of water and ethanol; adding the feed stream to a recycle stream comprising unconverted ethanol and water; heating the admixture to a predetermined reaction temperature and passing the thus heated admixture over a catalyst being active in non-oxidative conversion of ethanol to acetic acid to obtain an effluent being rich in acetic acid; optionally cooling the effluent; separating the effluent into a stream rich in acetic acid being essentially free of water, a hydrogen containing stream, and a stream with unconverted amounts of ethanol, water and reactive derivates of acetic acid and optionally ethyl acetate; recycling the stream with unconverted amounts of ethanol and water to step (a); determining the amount of water in the recycle stream and adjusting the composition of the ethanol and water feed stream in step (a) to a water/ethanol mole ratio of between 0.3/0.7 to 0.6/0.4.
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