B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/411
B01J 8/00 (2006.01) B01D 9/00 (2006.01) B01D 9/04 (2006.01) B01D 33/00 (2006.01)
Patent
CA 1197076
Abstract A washing column for the continuous separation between a solid chemical formed in a liquid multi-component system, on the one hand, and the mother liquor in which the solid chemical is suspended, on the other. In a cylindrical working space a stationary, straight, plane washing front is maintained in a packed bed of the solid chemical substance between the mother liquor, on the one hand, and a melt of the solid chemical, on the other. According to the invention, the washing column is double-walled to form an enveloping space, which contains a heat insulating medium and can be pressurized to conform to the pressure within the column. This construction permits the use of a relatively thin, glass inner wall of uniform wall thickness and inner surface. This renders the column resistant to corrosive chemicals, reduces the effect of heat exchange with the surroundings, and prevents instabilities in the washing front.
417517
Douwe Egberts Koninklijke Tabaksfabriek-Koffiebranderijen-Theeha
Goudreau Gage Dubuc
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