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
- 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
amount
anionic
anionic dye
aqueous
aqueous solution
biphase-forming
biphase-forming amount
bound
comprises
comprises separation
concentration
contact
contacting
contain
containing solution
contains
disclosed
dissolved
dye
dye molecules
dye solution
dye-bound
dye-containing
ethylene
ethylene glycol
form
freed
glycol
initial
liquid
liquid biphase-forming
liquid phase
lyotropic
molecules
particles
phase
phase process
poly
preferably
process
recovering
recovery
salt
separated
separated contains
separating
separation
separation particles
solid
solid phase
solution
surface-bonded
surface-bonded poly