Continuous process for separating high boiling heat...

Details Continuous process for separating high boiling heat... Continuous process for separating high boiling heat...

B - Operations, Transporting

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202/104

B01D 3/28 (2006.01) B01D 1/06 (2006.01) B01D 3/14 (2006.01) C07D 317/38 (2006.01)

Patent

CA 1145291

11908 CONTINUOUS PROCESS FOR SEPARATING HIGH BOILING, HEAT SENSITIVE MATERIALS ABSTRACT OF THE DISCLOSURE This invention is concerned with a continuous process for separating higher boiling, heat sensitive com- ponents from a liquid-product stream. It involves a rapid evaporation of the desired product of the stream in an evaporator which minimizes residence time, such as a falling film evaporator, and feeding the vapors and the remainder of the stream to a separation column where the vaporized products rise in the column. Part of the vaporized products are removed after condensation and then recycled back to the column as reflux. This reflux after contacting one or more trays is collected and recycled to the evaporator and mixed with the product feed being treated. The liquid reminder of the feed stream is collected at the bottom of the column. the bottom of the column can be kept at a temperature which minimizes any breakdown of the heat sensitive components present therein and, if desired, the bottoms in the column can be quickly withdrawn for treatment elsewhere or for recycling back to the process. A desirable embodiment is to recycle a portion of the residue at the bottom of the column back to the evaporator. S P E C I F I C A T I O N

318305

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