Assertion: acrolein | /r/CapableOf | contain in the air-flow
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Source sentences:
text: For example, second method according to US3 433 840 purified acrolein is, the water selectivity absorbs the multiple acid in the gaseous mixture, also is to reclaim the propenal that contains in the air-flow then, and described air-flow contains from the water of absorption step and uncondensable gas.