| 摘要 |
1464558 Liquefying gases CRYOPLANTS Ltd 8 April 1974 [13 April 1973] 18041/73 Heading F4P Vapour 4 form LNG tank 2 is compressed at 8, 12, 18 and then cooled in heat exchange with the feed vapour 4, the outlet pressure of compressor 8, 12 depending on the average molecular weight of the vapour which is adjustable by the selective addition of a vapour stream 40 of higher average molecular weight. Liquefaction and separation occurs in column 30 which can be modified to give a pure N 2 product (Fig. 2, not shown). |
