| 主权项 |
1. A method of recovering 1,3-butadiene and methylethylketone from dehydration products of 2,3-butanediol, comprising:
a) providing a vapor stream comprising 1,3-butadiene, butene, methylethylketone, aldehyde, alcohol and water, as the dehydration products of 2,3-butanediol; b) cooling the vapor stream, thus separating a 1,3-butadiene-rich first vapor stream and a methylethylketone-rich first liquid stream; c) transferring the first vapor stream to a 1,3-butadiene purification unit, thus recovering 1,3-butadiene; d) subjecting the first liquid stream to phase separation, thus obtaining a second liquid stream as an organic phase and a third liquid stream as an aqueous solution phase, separately from c); e) separating the third liquid stream into (i) a water-rich bottom stream and (ii) a fourth liquid stream comprising a methylethylketone-water azeotropic mixture as an overhead stream; f) combining the second liquid stream and the fourth liquid stream, and removing water from the combined liquid stream, thus obtaining a fifth liquid stream; and g) recovering methylethylketone from the fifth liquid stream. |
