Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2244
Título: Solubility of red 153 and blue 1 in supercritical carbon dioxide
Autor: Coelho, José Augusto Paixão
Stateva, Roumiana P.
Palavras-chave: Disperse dyes
Anthraquinone dyes
Data: Dez-2011
Editora: Amer Chemical Soc
Citação: COELHO, José P.; STATEVA, Roumiana P. - Solubility of Red 153 and Blue 1 in Supercritical Carbon Dioxide. Journal of Chemical and Engineering Data. ISSN 0021-9568. Vol. 56, n.º 12 (2011) p. 4686-4690.
Resumo: Solubilities of red 153, (3-[[4-[[5,6(or 6,7)-dichloro-2-benzothiazolyl]azo]phenyl]ethylamino]propanenitrile), an azo compound, and disperse blue1 (1,4,5,8-tetraaminoantraquinone) in supercritical carbon dioxide (SC CO(2)) were measured at T = (333.2 to 393.2) K over the pressure range (12.0 to 40.0) MPa by a flow type apparatus. The solubility of red 153 (0.985. 10(-6) to 37.2. 10(-6)) in the overall region of measurements is found to be significantly higher than that of disperse blue 1 (1.12.10(-7) to 4.89.10(-7)). The solubility behavior of disperse red 153 follows the general solubility trend displayed by disperse dyes with a crossover pressure at about 20 MPa. On the other hand, blue 1, which is a disperse anthraquinone dye, exhibits unexpected behavior not recorded previously there is no crossover pressure at the temperature and pressure ranges studied, and the dye's solubility at T = 333.2 K practically does not increase with pressure. To the best of our knowledge, there are no previous measurements of blue 1 solubility in SC CO(2) reported in the literature. The experimental data were correlated by using the Soave Redlich Kwong equation of state (EoS) with the one-fluid van der Waals mixing rule, and an acceptable correlation of the solubility data for both dyes was obtained.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2244
ISSN: 0021-9568
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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