Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water

Detalhes bibliográficos
Autor(a) principal: Pereira, Martinha
Data de Publicação: 2004
Outros Autores: You-Ting Wu, Madeira, Pedro, Venâncio, Armando, Macedo, Eugénia, Teixeira, J. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/1486
Resumo: The phase diagrams of Ucon 50-HB-5100 (Ucon) + ammonium sulfate (NH4)(2)SO4 + water, Ucon 50-HB-5100 + poly(vinyl alcohol) 10000 (PVA 10000) + water, Ucon 50-HB-5100 + hydroxypropyl starch (Reppal PES 100) + water, and poly(ethylene glycol) 8000 (PEG 8000)-PVA 10000 systems were determined at 22 degreesC. Measurements at 30 and 40 degreesC were also done for each Ucon-salt system. A linear regression was used to calculate the slope and standard deviation for each tie line. The standard deviations are in most situations lower than 0.1, and the tie-line slopes for each phase diagram vary within 5.5% around the medium value for all cases with the exception of the Ucon + (NH4)(2)SO4 + water system at 40 degreesC. The phase diagrams of the Ucon + (NH4)(2)SO4 + water system at different temperatures were shown to have a smaller amount of salt and polymer than conventional systems and to be thermoseparating, versatile, and particularly attractive, since phase formation is temperature-dependent. The phase diagrams of Ucon + PVA 10000 + water, Ucon + PES + water, and PEG + PVA 10000 + water systems were very similar, since high polymer concentrations (PES or PVA 10000) are required to form the two phases.
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spelling Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + waterScience & TechnologyThe phase diagrams of Ucon 50-HB-5100 (Ucon) + ammonium sulfate (NH4)(2)SO4 + water, Ucon 50-HB-5100 + poly(vinyl alcohol) 10000 (PVA 10000) + water, Ucon 50-HB-5100 + hydroxypropyl starch (Reppal PES 100) + water, and poly(ethylene glycol) 8000 (PEG 8000)-PVA 10000 systems were determined at 22 degreesC. Measurements at 30 and 40 degreesC were also done for each Ucon-salt system. A linear regression was used to calculate the slope and standard deviation for each tie line. The standard deviations are in most situations lower than 0.1, and the tie-line slopes for each phase diagram vary within 5.5% around the medium value for all cases with the exception of the Ucon + (NH4)(2)SO4 + water system at 40 degreesC. The phase diagrams of the Ucon + (NH4)(2)SO4 + water system at different temperatures were shown to have a smaller amount of salt and polymer than conventional systems and to be thermoseparating, versatile, and particularly attractive, since phase formation is temperature-dependent. The phase diagrams of Ucon + PVA 10000 + water, Ucon + PES + water, and PEG + PVA 10000 + water systems were very similar, since high polymer concentrations (PES or PVA 10000) are required to form the two phases.Fundação para a Ciência e a Tecnologia (FCT) – PRAXIS XXI.Fundação para a Ciência e a Tecnologia (FCT) – Programa Operacional “Ciência, Tecnologia, Inovação” (POCTI) - POCTI/EQU/33185/99.CEC - INCO-DC - contract number ERB IC18 CT97 0182.American Chemical SocietyUniversidade do MinhoPereira, MartinhaYou-Ting WuMadeira, PedroVenâncio, ArmandoMacedo, EugéniaTeixeira, J. A.20042004-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/1486eng“Journal of chemical & engineering data”. ISSN 0021-9568. 49:1(2004) 43-47.0021-956810.1021/je034038dinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:59:06Zoai:repositorium.sdum.uminho.pt:1822/1486Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:48:51.551867Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
title Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
spellingShingle Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
Pereira, Martinha
Science & Technology
title_short Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
title_full Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
title_fullStr Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
title_full_unstemmed Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
title_sort Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water
author Pereira, Martinha
author_facet Pereira, Martinha
You-Ting Wu
Madeira, Pedro
Venâncio, Armando
Macedo, Eugénia
Teixeira, J. A.
author_role author
author2 You-Ting Wu
Madeira, Pedro
Venâncio, Armando
Macedo, Eugénia
Teixeira, J. A.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Pereira, Martinha
You-Ting Wu
Madeira, Pedro
Venâncio, Armando
Macedo, Eugénia
Teixeira, J. A.
dc.subject.por.fl_str_mv Science & Technology
topic Science & Technology
description The phase diagrams of Ucon 50-HB-5100 (Ucon) + ammonium sulfate (NH4)(2)SO4 + water, Ucon 50-HB-5100 + poly(vinyl alcohol) 10000 (PVA 10000) + water, Ucon 50-HB-5100 + hydroxypropyl starch (Reppal PES 100) + water, and poly(ethylene glycol) 8000 (PEG 8000)-PVA 10000 systems were determined at 22 degreesC. Measurements at 30 and 40 degreesC were also done for each Ucon-salt system. A linear regression was used to calculate the slope and standard deviation for each tie line. The standard deviations are in most situations lower than 0.1, and the tie-line slopes for each phase diagram vary within 5.5% around the medium value for all cases with the exception of the Ucon + (NH4)(2)SO4 + water system at 40 degreesC. The phase diagrams of the Ucon + (NH4)(2)SO4 + water system at different temperatures were shown to have a smaller amount of salt and polymer than conventional systems and to be thermoseparating, versatile, and particularly attractive, since phase formation is temperature-dependent. The phase diagrams of Ucon + PVA 10000 + water, Ucon + PES + water, and PEG + PVA 10000 + water systems were very similar, since high polymer concentrations (PES or PVA 10000) are required to form the two phases.
publishDate 2004
dc.date.none.fl_str_mv 2004
2004-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/1486
url http://hdl.handle.net/1822/1486
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv “Journal of chemical & engineering data”. ISSN 0021-9568. 49:1(2004) 43-47.
0021-9568
10.1021/je034038d
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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