| 摘要 |
<p>957,871. Fractional distillation. GES. FUR LINDE'S EISMASCHINEN A.G. Jan. 23, 1962 [Jan. 26, 1961], No. 2356/62. Heading B1B. [Also in Division F4] Fractional distillation of a liquid mixture is carried out discontinuously whereby ascent of the vapour and descent of liquid in the rectification zone 3 take place alternately at relatively short intervals of time. As applied to air rectification (see Division F4) the column 3 has a gaseous nitrogen effluent conduit 17 provided with an automatically timed valve 18 which when closed momentarily results in a gas pressure build-up in the column head which forces washing liquid downwardly through the apertures of a series of vertically spaced horizontal perforated plates 4 extending across the whole cross-sectional area of the column.</p> |
