skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin

Abstract

Aqueous solutions of nonionic surfactants are known to undergo phase separations at elevated temperatures. This phenomenon is known as clouding,' and the temperature at which it occurs is refereed to as the cloud point. Permethylhydroxypropyl-[beta]-cyclodextrin (PMHP-[beta]-CD) was synthesized and aqueous solutions containing it were found to undergo similar cloud-point behavior. Factors that affect the phase separation of PMHP-[beta]-CD were investigated. Subsequently, the cloud-point extractions of several aromatic compounds (i.e., acetanilide, aniline, 2,2[prime]-dihydroxybiphenyl, N-methylaniline, 2-naphthol, o-nitroaniline, m-nitroaniline, p-nitroaniline, nitrobenzene, o-nitrophenol, m-nitrophenol, p-nitrophenol, 4-phenazophenol, 3-phenylphenol, and 2-phenylbenzimidazole) from dilute aqueous solution were evaluated. Although the extraction efficiency of the compounds varied, most can be quantitatively extracted if sufficient PMHP-[beta]-CD is used. For those few compounds that are not extracted (e.g., o-nitroacetanilide), the cloud-point procedure may be an effective one-step isolation or purification method. 18 refs., 2 figs., 3 tabs.

Authors:
; ;  [1]
  1. Univ. of Missouri, Rolla (United States)
Publication Date:
OSTI Identifier:
6718075
Resource Type:
Journal Article
Journal Name:
Separation Science and Technology; (United States)
Additional Journal Information:
Journal Volume: 28:4; Journal ID: ISSN 0149-6395
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AROMATICS; EXTRACTION; ORGANIC COMPOUNDS; REMOVAL; WATER; PURIFICATION; ANILINE; AQUEOUS SOLUTIONS; DEXTRIN; NAPHTHOLS; NITRO COMPOUNDS; NITROBENZENE; PHENOLS; SEPARATION PROCESSES; SURFACTANTS; AMINES; CARBOHYDRATES; DISPERSIONS; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; MIXTURES; ORGANIC NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; POLYSACCHARIDES; SACCHARIDES; SOLUTIONS; 400105* - Separation Procedures

Citation Formats

Warner-Schmid, D, Hoshi, Suwaru, and Armstrong, D W. Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin. United States: N. p., 1993. Web. doi:10.1080/01496399308029234.
Warner-Schmid, D, Hoshi, Suwaru, & Armstrong, D W. Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin. United States. https://doi.org/10.1080/01496399308029234
Warner-Schmid, D, Hoshi, Suwaru, and Armstrong, D W. 1993. "Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin". United States. https://doi.org/10.1080/01496399308029234.
@article{osti_6718075,
title = {Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin},
author = {Warner-Schmid, D and Hoshi, Suwaru and Armstrong, D W},
abstractNote = {Aqueous solutions of nonionic surfactants are known to undergo phase separations at elevated temperatures. This phenomenon is known as clouding,' and the temperature at which it occurs is refereed to as the cloud point. Permethylhydroxypropyl-[beta]-cyclodextrin (PMHP-[beta]-CD) was synthesized and aqueous solutions containing it were found to undergo similar cloud-point behavior. Factors that affect the phase separation of PMHP-[beta]-CD were investigated. Subsequently, the cloud-point extractions of several aromatic compounds (i.e., acetanilide, aniline, 2,2[prime]-dihydroxybiphenyl, N-methylaniline, 2-naphthol, o-nitroaniline, m-nitroaniline, p-nitroaniline, nitrobenzene, o-nitrophenol, m-nitrophenol, p-nitrophenol, 4-phenazophenol, 3-phenylphenol, and 2-phenylbenzimidazole) from dilute aqueous solution were evaluated. Although the extraction efficiency of the compounds varied, most can be quantitatively extracted if sufficient PMHP-[beta]-CD is used. For those few compounds that are not extracted (e.g., o-nitroacetanilide), the cloud-point procedure may be an effective one-step isolation or purification method. 18 refs., 2 figs., 3 tabs.},
doi = {10.1080/01496399308029234},
url = {https://www.osti.gov/biblio/6718075}, journal = {Separation Science and Technology; (United States)},
issn = {0149-6395},
number = ,
volume = 28:4,
place = {United States},
year = {Mon Mar 01 00:00:00 EST 1993},
month = {Mon Mar 01 00:00:00 EST 1993}
}