| 摘要 |
1,174,235. Fractionating columns. FISONS INDUSTRIAL CHEMICAL Ltd. 20 Feb., 1967 [12 March, 1966], No. 10983/66. Heading B1B. [Also in Division C2] An apparatus for separating one or more components of a mixture consisting -of an acyclic ketone capable of forming a minimum boiling azeotrope with water, the azine and, optionally, the hydrazine of the ketone, ammonia, sodium chloride, ketone condensation products and water, comprises a fractionating column the vapour pipe of which leads to a reflux condenser which discharges into a twophase liquid separator unit, the separator having two communicating zones, the first zone having connecting means with the reflux condenser, and with the second zone at a point below the interface of the two phases, the second zone having an overflow means connected to the fractionating column whereby the lower phase overflows back into the column and the first zone having an offtake line located so as to remove the upper phase. The mixture may be introduced into the apparatus above, below or into the liquid separator, into the fractionating column or above the reflux condenser. The fractionating column preferably has at least 5 theoretical plates. To prevent loss of ketone and azine in the vapour leaving the reflux condenser a section of packed column, through which water or aqueous ammonia is passed, may be fitted above the condenser. The apparatus is illustrated by reference to drawings (not shown) of two different separator units.
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