| 摘要 |
1,216,256. Separating H 2 and CH 4 LINDE A.G. 4 Oct., 1968 [3 Nov., 1967], No. 47153/ 68. Heading B1L. [Also in Division F4] Separation of a hydrogen-containing gas mixture, e.g. coke oven gas, delivered by a compressor to provide either ammonia synthesis gas or pure hydrogen is effected by cooling the gas mixture in at least two reversible regenerators 2 to 4 and 5 to 7 thereby condensing high boiling components, further cooling the resulting crude hydrogen fraction in heat exchangers 14, 15 and 17, 18, 19, and then either freeing it from methane by scrubbing with liquid nitrogen in a column 20, thereby producing synthesis gas;or condensing the methane in a condenser (not shown) which replaces the column 20, thereby producing pure hydrogen. The synthesis gas or the pure hydrogen is expanded at 25 and part of the expanded gas is then passed through tube coils 8 to 13 in at least one of the regenerators 2 to 7. Another part of the gas is used to cool heat exchanger 22 traversed by compressed nitrogen delivered by a compressor 21. This nitrogen is further cooled at 23 prior to being liquefied in an expansion valve 24, and then fed either to column 20 as washing liquid, or to the substituted condenser (not shown) for purifying the crude hydrogen. Condensate withdrawn from column 20 or the substituted condenser is expanded at 27, 28 and used to cool heat exchangers 19, 23, 14 and regenerators 5 to 7, before being withdrawn at 30.
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