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Title: Process for separating dissolved solids from a liquid using an anti-solvent and multiple effect evaporators

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.
Inventors:
 [1];  [2];  [3]
  1. (Oak Lawn, IL)
  2. (Chicago, IL)
  3. (Channahon, IL)
Issue Date:
OSTI Identifier:
869391
Assignee:
University of Chicago (Chicago, IL) CHO
Patent Number(s):
US 5330618
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
process; separating; dissolved; solids; liquid; anti-solvent; multiple; effect; evaporators; treating; aluminum; salt; cake; containing; water; soluble; halide; salts; contacting; dissolve; forming; saturated; brine; solution; transporting; portion; 25; reactor; introducing; equal; volume; water-miscible; low-boiling; organic; material; acetone; precipitate; three-phase; mixture; aqueous-organic-salt; phase; precipitated; rich; separated; phases; recycled; remainder; evaporator; plurality; stages; stage; producing; grade; steam; boil; salt solution; water soluble; organic material; containing water; halide salt; salt cake; organic portion; phase mixture; halide salts; rich phase; solution ph; aluminum salt; dissolved solids; /159/23/75/202/203/423/