| 摘要 |
358,842. Separating gases by liquefaction. GES. FUR LINDE'S EISMASCHINEN AKT.-GES., Hollriegelskreuth, near Munich, Germany. Feb. 5, 1931, No. 3695. Convention date, Feb. 6, 1930. [Class 8 (ii).] Air is separated into oxygen and nitrogen in a double rectification column 1, 2, the nitrogen from the first stage rectifier being taken as a gas without expansion to the heating coil 6 of a third rectifier 3 producing argon from a mixture of oxygen and argon taken through a pipe 4 from the second column at a point where the oxygen content amounts to 90-98 per cent. The nitrogen from the first-stage rectifier after passing through the coil 6 is expanded into the condenser 9 of the argon rectifier.
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