Process for separating and recovering an anionic dye from an aqueous solution
- DeKalb, IL
- Naperville, IL
- Tallahassee, FL
A solid/liquid phase process for the separation and recovery of an anionic dye from an aqueous solution is disclosed. The solid phase comprises separation particles having surface-bonded poly(ethylene glycol) groups, whereas the aqueous solution from which the anionic dye molecules are separated contains a poly(ethylene glycol) liquid/liquid biphase-forming amount of a dissolved lyotropic salt. After contact between the aqueous solution and separation particles, the anionic dye is bound to the particles. The bound anionic dye molecules are freed from the separation particles by contacting the anionic dye-bound particles with an aqueous solution that does not contain a poly(ethylene glycol) liquid/liquid biphase-forming amount of a dissolved lyotropic salt to form an aqueous anionic dye solution whose anionic dye concentration is preferably higher than that of the initial dye-containing solution.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Arch Development Corp. (Chicago, IL); Northern Illinois University (DeKalb, IL)
- Patent Number(s):
- US 5707525
- OSTI ID:
- 871323
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
separating
recovering
anionic
dye
aqueous
solution
solid
liquid
phase
separation
recovery
disclosed
comprises
particles
surface-bonded
poly
ethylene
glycol
molecules
separated
contains
biphase-forming
amount
dissolved
lyotropic
salt
contact
bound
freed
contacting
dye-bound
contain
form
concentration
preferably
initial
dye-containing
separation particles
anionic dye
ethylene glycol
aqueous solution
liquid phase
solid phase
dye molecules
phase process
separated contains
surface-bonded poly
comprises separation
dye solution
biphase-forming amount
liquid biphase-forming
containing solution
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