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A cool way to recycle solvents from exhaust-air streams

| By Chemical Engineering

Messer Group GmbH (Krefeld, Germany; edlinks.chemengonline.com/6516-531) has commercialized a liquid-nitrogen- (LNâ‚‚) based process for purifying exhaust air that contains high (100–1,000 g/m3) loads of chlorofluorocarbons (CFCs) or solvents.…