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Method for recovering krypton and xenon from air, comprises separating nitrogen and oxygen and feeding krypton- and xenon-containing fraction into enrichment column, stream of pure air being decompressed and fed into column
Method for recovering krypton and xenon from air, comprises separating nitrogen and oxygen and feeding krypton- and xenon-containing fraction into enrichment column, stream of pure air being decompressed and fed into column
Method for recovering krypton and/or xenon by low temperature separation from air comprises feeding a compressed stream of pure air into a rectification column for separating nitrogen and oxygen which comprises a high pressure column and a low pressure column. A krypton- and xenon-containing fraction is fed into the center of a krypton-xenon enrichment column, from which a krypton-xenon concentrate is removed. Method for recovering krypton and/or xenon by low temperature separation from air comprises feeding a compressed stream of pure air (1) into a rectification column for separating nitrogen and oxygen which comprises a high pressure column (2) and a low pressure column (3). A krypton- and xenon-containing fraction (26) is fed into the center of a krypton-xenon enrichment column (24), from which a krypton-xenon concentrate (30) is removed. A second compressed stream of pure air (103) is decompressed (87) and the product (88) fed into the krypton-xenon enrichment column. An independent claim is also included for apparatus for carrying out the method.
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