B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
202/83
B01D 3/38 (2006.01)
Patent
CA 1188650
ABSTRACT OF THE DISCLOSURE Especially in solvent extraction processes, solvents are removed by stripping with steam the amounts of solvent remaining in the extract and in the raffinate,respectively,in an extract stripp- ing column and raffinate stripping column, where- upon the condensates of the solvent-containing overhead vapours are transferred to a separator where the condensates separate into two phases, the aqueous phase is withdrawn from the separator and the amounts of solvent remaining in the aqueous phase are stripped with steam in a water stripping column and the condensate of the overhead vapours is introduced into the same separator, whereby the water from which solvent has been removed is accumulated at the bottom of the water stripping column, is withdrawn therefrom and transferred to a vessel where it is re-evaporated by indirect heat exchange with hot process streams withdrawn from the solvent recovery section and is returned in the form of steam to the respective stripping column as stripping steam.
428092
Edeleanu Gesellschaft M.b.h.
Smart & Biggar
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