Apparatus for intermediate enrichment of trace substances from a

Details Apparatus for intermediate enrichment of trace substances from a Apparatus for intermediate enrichment of trace substances from a

1989-11-20

1991-02-12

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55208, 55267, 55386, B01D 1508

Patent

active

049920839

ABSTRACT:
For intermediate enrichment of trace substances from a gas stream, a cold ap is used which carries a flow and optionally contains an adsorbent material and which is surrounded by a gas-tight double-walled jacket into which cooling fluid from a surrounding cooling bath can penetrate via an extension tube at the bottom. For desorption, the cooling fluid is expelled from the double-walled jacket via compressed air and a valve control. A pipe loop connected to the double-walled jacket and having a heater winding and circulation pump allows rapid heating of the cold trap. A level control apparatus connected to the compressed-air line allows sensitive level adjustment in the bottom extension tube of the double-walled jacket during the desorption phase. Such a cold trap is advantageous, inter alia, in a chromatography arrangement with a separation column and fractionating column of high resolution and sensitivity.

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