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Title: Method for separating water soluble organics from a process stream by aqueous biphasic extraction

Abstract

A method for separating water-miscible organic species from a process stream by aqueous biphasic extraction is provided. An aqueous biphase system is generated by contacting a process stream comprised of water, salt, and organic species with an aqueous polymer solution. The organic species transfer from the salt-rich phase to the polymer-rich phase, and the phases are separated. Next, the polymer is recovered from the loaded polymer phase by selectively extracting the polymer into an organic phase at an elevated temperature, while the organic species remain in a substantially salt-free aqueous solution. Alternatively, the polymer is recovered from the loaded polymer by a temperature induced phase separation (cloud point extraction), whereby the polymer and the organic species separate into two distinct solutions. The method for separating water-miscible organic species is applicable to the treatment of industrial wastewater streams, including the extraction and recovery of complexed metal ions from salt solutions, organic contaminants from mineral processing streams, and colorants from spent dye baths.

Inventors:
 [1];  [1]
  1. (Naperville, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
872499
Patent Number(s):
5948263
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; separating; water; soluble; organics; process; stream; aqueous; biphasic; extraction; water-miscible; organic; species; provided; biphase; generated; contacting; comprised; salt; polymer; solution; transfer; salt-rich; phase; polymer-rich; phases; separated; recovered; loaded; selectively; extracting; elevated; temperature; remain; substantially; salt-free; alternatively; induced; separation; cloud; whereby; separate; distinct; solutions; applicable; treatment; industrial; wastewater; streams; including; recovery; complexed; metal; contaminants; mineral; processing; colorants; spent; dye; baths; selectively extracting; biphasic extraction; polymer phase; salt solutions; aqueous biphasic; industrial waste; water stream; phase separation; salt solution; water soluble; organic contaminant; organic phase; process stream; aqueous solution; elevated temperature; organic contaminants; polymer solution; organic species; water-miscible organic; rich phase; selectively extract; soluble organics; induced phase; industrial wastewater; separating water; soluble organic; loaded polymer; /210/

Citation Formats

Chaiko, David J., and Mego, William A. Method for separating water soluble organics from a process stream by aqueous biphasic extraction. United States: N. p., 1999. Web.
Chaiko, David J., & Mego, William A. Method for separating water soluble organics from a process stream by aqueous biphasic extraction. United States.
Chaiko, David J., and Mego, William A. Fri . "Method for separating water soluble organics from a process stream by aqueous biphasic extraction". United States. https://www.osti.gov/servlets/purl/872499.
@article{osti_872499,
title = {Method for separating water soluble organics from a process stream by aqueous biphasic extraction},
author = {Chaiko, David J. and Mego, William A.},
abstractNote = {A method for separating water-miscible organic species from a process stream by aqueous biphasic extraction is provided. An aqueous biphase system is generated by contacting a process stream comprised of water, salt, and organic species with an aqueous polymer solution. The organic species transfer from the salt-rich phase to the polymer-rich phase, and the phases are separated. Next, the polymer is recovered from the loaded polymer phase by selectively extracting the polymer into an organic phase at an elevated temperature, while the organic species remain in a substantially salt-free aqueous solution. Alternatively, the polymer is recovered from the loaded polymer by a temperature induced phase separation (cloud point extraction), whereby the polymer and the organic species separate into two distinct solutions. The method for separating water-miscible organic species is applicable to the treatment of industrial wastewater streams, including the extraction and recovery of complexed metal ions from salt solutions, organic contaminants from mineral processing streams, and colorants from spent dye baths.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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