Concentrating evaporators – Processes
Patent
1992-12-10
1994-07-19
Manoharan, Virginia
Concentrating evaporators
Processes
23300, 23303, 75672, 159 29, 159 171, 159DIG8, 202174, 203 73, 203DIG9, 423131, 423205, 423208, 4236585, B01D 126
Patent
active
053306180
ABSTRACT:
A process and system for treating aluminum salt cake containing water soluble halide salts by contacting the salt cake with water to dissolve water soluble halide salts forming a saturated brine solution. Transporting a portion of about 25% of the saturated brine solution to a reactor and introducing into the saturated brine solution at least an equal volume of a water-miscible low-boiling organic material such as acetone to precipitate a portion of the dissolved halide salts forming a three-phase mixture of an aqueous-organic-salt solution phase and a precipitated salt phase and an organic rich phase. The precipitated salt phase is separated from the other phases and the organic rich phase is recycled to the reactor. The remainder of the saturated brine solution is sent to a multiple effect evaporator having a plurality of stages with the last stage thereof producing low grade steam which is used to boil off the organic portion of the solution which is recycled.
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Bonsignore Patrick V.
Daniels Edward J.
Jody Bassam J.
Manoharan Virginia
University of Chicago
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