Process for separating and recovering an anionic dye from an aqueous solution

Rogers, Robin; Horwitz, E Philip; Bond, Andrew H

Title: Process for separating and recovering an anionic dye from an aqueous solution

Patent · Tue Jan 13 00:00:00 EST 1998

OSTI ID:871323

Rogers, Robin ^[1]; Horwitz, E Philip ^[2]; Bond, Andrew H ^[3]

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.

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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

References (20)

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aqueous
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ethylene
glycol
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contains
biphase-forming
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lyotropic
salt
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freed
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ethylene glycol
aqueous solution
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solid phase
dye molecules
phase process
separated contains
surface-bonded poly
comprises separation
dye solution
biphase-forming amount
liquid biphase-forming
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Title: Process for separating and recovering an anionic dye from an aqueous solution

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References (20)

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