| 摘要 |
795,270. Cold separation of gas mixtures. STAMICARBON N.V. Jan. 31, 1956 [Feb. 4, 1955], No. 3085/56. Class 8(2). In a low temperature gas mixture separation process wherein cooling of the mixture prior to its separation into gaseous and liquid fractions is effected by passage through a heat exchanger 2 traversed by a reverse flow of said separated fractions, a sufficient portion of the liquid fraction from a tank 3 is vaporized in a duct 11 within the exchanger 2 so as to saturate at least a portion of the gaseous fraction when added thereto through a duct 12 prior to its entry to the cold end of the exchanger 2 through a duct 8 and at a temperature intermediate the freezing point and boiling point of the liquid fraction ; the remainder of the latter being added to the saturated gaseous fraction through a duct 13. As shown a 4 to 1 hydrogen-nitrogen mixture is cooled to 66À5‹K in the exchanger 2 so that most of the nitrogen condenses and collects in the tank 3. The remaining nitrogen is deposited in that section of an accumulator 5 not being derimed by hydrogen returning through a duct 6a from a deuterium extraction column (not shown) and the nitrogen-contaminated hydrogen in a duct 6 and at 62À5‹K is divided into a major portion which traverses a duct 7 of the exchanger 2 and into a minor portion which traverses the duct 8 and to which is added the vaporized and liquid nitrogen portions. |
