Washing column
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United States of America Patent
Stats
-
Nov 6, 1984
Grant Date -
N/A
app pub date -
Dec 27, 1982
filing date -
Dec 28, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A washing column for the continuous separation between a solid chemical fed 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.
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