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

Abstract

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. 7 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
OSTI Identifier:
570508
Patent Number(s):
5707525
Application Number:
PAN: 8-655,251; CNN: Grant CTS-9207264
Assignee:
Arch Development Corp., Chicago, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 13 Jan 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; DYES; MATERIALS RECOVERY; SEPARATION PROCESSES; AQUEOUS SOLUTIONS; POLYETHYLENE GLYCOLS; ADSORBENTS

Citation Formats

Rogers, R, Horwitz, E P, and Bond, A H. Process for separating and recovering an anionic dye from an aqueous solution. United States: N. p., 1998. Web.
Rogers, R, Horwitz, E P, & Bond, A H. Process for separating and recovering an anionic dye from an aqueous solution. United States.
Rogers, R, Horwitz, E P, and Bond, A H. Tue . "Process for separating and recovering an anionic dye from an aqueous solution". United States.
@article{osti_570508,
title = {Process for separating and recovering an anionic dye from an aqueous solution},
author = {Rogers, R and Horwitz, E P and Bond, A H},
abstractNote = {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. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}