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METHOD FOR THE DISTILLATIVE WORKING UP OF WATER AND METHANOL CONTAINING HIGHER ALCOHOLS WITH 6 TO 20 C ATOMS.
METHOD FOR THE DISTILLATIVE WORKING UP OF WATER AND METHANOL CONTAINING HIGHER ALCOHOLS WITH 6 TO 20 C ATOMS.
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机译:用6至20 C原子对含较高级醇的水和甲醇进行精馏的方法。
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摘要
For the distillation of a stream consisting essentially of alcohols of 6-20 carbon atoms, water and methanol, the methanol is first separated from the homogeneous, aqueous solution as the overhead product by distillation under a head pressure of 500-1,000 mbar. The bottoms discharge is mechanically separated under normal pressure and at a temperature of 5 DEG -95 DEG C. in a phase separator to obtain a discrete water phase preferably containing at least two thirds of the feedstream water. The remaining organic phase is then transferred from the phase separator into a second distillation column and the organic phase is dewatered in the latter at 100-500 mbar. The head product from the second column is conducted to a second phase separator; the aqueous phase is separated therein at a temperature of 5 DEG -95 DEG C. and optionally returned into the first phase separator. The bottom product from the second distillation column is passed into a downstream distillation stage wherein the C6 to C20 alcohols are separated into fractions thereof.
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