| 摘要 |
<p>1. A process for concentrating a dilute aqueous solution of ethylene oxide, resulting from the absorption in water of this product contained in the gaseous mixture issuing from the zone of catalytic oxidation of ethylene by oxygen in the vapour phase, by desorption of the ethylene oxide by water vapour in a distillation column operating at a mean pressure between 1.2 and 6 bars inclusive, characterized in that the solution to be concentrated is at a temperature between 70 degree C and a value less than 100 degree C when it is introduced into the column, and the aqueous flow withdrawn at the base of the column is reduced in pressure to an absolute pressure between 0.4 and 1.5 bars inclusive to form a gaseous current which is introduced into the column ot be used as desorbing fluid for the ethylene oxide.</p> |
