Bibliographic Citation
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| Title | Removal of organic compounds from water via cloud-point extraction with permethyl hydroxypropyl-[beta]-cyclodextrin |
| Creator/Author | Warner-Schmid, D. ; Hoshi, Suwaru ; Armstrong, D.W. (Univ. of Missouri, Rolla (United States)) |
| Publication Date | 1993 Mar 01 |
| OSTI Identifier | OSTI ID: 6718075 |
| Other Number(s) | ISSN0149-6395; CODEN: SSTEDS |
| Resource Type | Journal Article |
| Resource Relation | Separation Science and Technology ; Vol/Issue: 28:4 |
| Subject | 400105 -- Separation Procedures; AROMATICS-- EXTRACTION;ORGANIC COMPOUNDS-- EXTRACTION;ORGANIC COMPOUNDS-- REMOVAL;WATER-- PURIFICATION; ANILINE;AQUEOUS SOLUTIONS;DEXTRIN;NAPHTHOLS;NITRO COMPOUNDS;NITROBENZENE;PHENOLS;SEPARATION PROCESSES;SURFACTANTS |
| Related Subject | AMINES;AROMATICS;CARBOHYDRATES;DISPERSIONS;HYDROGEN COMPOUNDS;HYDROXY COMPOUNDS;MIXTURES;NITRO COMPOUNDS;ORGANIC COMPOUNDS;ORGANIC NITROGEN COMPOUNDS;OXYGEN COMPOUNDS;PHENOLS;POLYSACCHARIDES;SACCHARIDES;SEPARATION PROCESSES;SOLUTIONS |
| Description/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. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: 1009-1018 |
| System Entry Date | 2001 May 13 |
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Last Updated: 02/14/2009