Patent ID: 9186596
Filing Date: 2015-11-17
Classification: B01D

Abstract:
1. A method, comprising: passing a contaminated process stream comprising an odorant to a counter-current contacting device in which the odorant is stripped from the contaminated process stream through counter-current contact with a steam stream forming a stripped process stream and a contaminated steam comprising the odorant, passing the stripped process stream directly to a tube side of a falling film evaporator, producing the steam stream by heating the stripped process stream, whereby the steam stream passes into the counter-current contacting device to perform the stripping of the contaminated process stream, passing the contaminated steam from the counter-current contacting device to a vapour recompression step, introducing the contaminated steam into a shell side of the falling film evaporator, whereby the contaminated steam heats the stripped process stream to produce the steam stream, passing the contaminated steam that is not condensed in the falling film evaporator to a vent gas outlet as a low flow vent gas in which the odorant is concentrated.