| 摘要 |
A method for separation of ethylene oxide from post-reaction gases in an absorption/desorption reaction, whereas the post-reaction gas of 90-110 degrees C temperature and including ethylene oxide in the quantity of 0.8-1.2% per volume is contacted in the absorption zone with water of 30-24 degrees C and pressure of 1.8-2.0 MPa, and then, ethylene oxide is desorbed from water in the expelling zone by means of steam of 140 degrees C inlet temperature and pressure of 0.07-0.10 MPa, whereas water with ethylene oxide absorbed and water after the desorption exchange heat in a membrane heat exchanger, and the constant flow-rate water stream is returned after cooling to the absorption zone, characterized in that the absorption process is carried out in a plate column or in a filled column that includes at least 17 theoretical shelves, whereas the post-reaction gas and water can be supplied to more than just one absorption zone, whereas 95-130 moles of water are contacted with 1 mole of ethylene oxide included in the gas, whereas the desorption process is carried out in a shelf column or in a filled column that includes 14 theoretical shelves at least and with such a quantity of steam supplied to the expelling zone that the mole content be 0.0-0.0001, and preferably 0.000003-0.000006 as measured in water that leaves the expelling zone.
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