Kinetics of dimerization of vinylsulfonyl reactive dyes.

Motomura, Hiromi; Kim, In Hoi; Morita, Zenzo

doi:10.2115/fiber.47.11_598

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…Much of the published chemistry of C.I. Reactive Blue 19 has concerned the vinyl sulfone reactive moiety of the dye and is well-documented in the literature ( − ). On a different note, the formation of UBA aggregates in aqueous solution has been reported () but under neutral to alkaline conditions only.…”

Section: Introductionmentioning

confidence: 99%

Analytical Studies on the Oxidative Degradation of the Reactive Textile Dye Uniblue A

McCallum

Madison

Alkan

et al. 2000

Environ. Sci. Technol.

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Oxidative degradation process of organic materials in wastewater is an area of significant current interest. In the case of commercial textile dyes, little is known about the structures of the actual products that can form once a dye has been submitted to oxidative conditions. Here, a product analysis approach was applied to identify some of the major early degradation products of Uniblue A (UBA) when reacted with peroxydisulfate (PDS). UBA is the vinyl sulfone form and major wastewater constituent of the commercial anthraquinone textile dye C.I. Reactive Blue 19. Using NMR, LC-MS, and Raman, four reaction products could be identified, and possible reaction pathways are discussed.

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Section: Introductionmentioning

confidence: 99%

Analytical Studies on the Oxidative Degradation of the Reactive Textile Dye Uniblue A

McCallum

Madison

Alkan

et al. 2000

Environ. Sci. Technol.

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“…, were calculated using the same method as reported previously 10,11) . The fittest rate constant values for various reactions were obtained using a grid search method 13) .…”

Section: Calculation Methods Of Rate Constantsmentioning

confidence: 99%

“…The hydrolytic behavior was examined by the same experimental method as reported previously [10][11][12] . In order to determine the kinetic aspects of the elementary process of …”

Section: Experimental 21 Reactive Dyesmentioning

confidence: 99%

Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes - Easiness of Dimerization -

Kim¹

2015

Textile Coloration and Finishing

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Abstract:The aim of the current study is to identify the dimerization and decomposition kinetics of the F-DM type.The regeneration of F-VS from FiFj-DM or the reversibility of the dimerizations were investigated. The order of real rate constants of the dimerization(′ D ij ) would seem to be similar to that of rate constants of a dimerization( D ij ) for VS dyes at a given pH because of the constancy of the equilibrium constants( a j -value). The reverse reactions of the DM types are appeared to occur in two steps, the deprotonation of α-carbon of the DM types and disproportionation. The ratio of the decomposition of the DM type to F-Hy and F-VS appears to be related with the ratio of i/ j. Similarities were also found among various other reactions, including homo-and mixed dimerization. VS dyes undergoing fast hydrolysis have difficulty in forming a dimer. The higher the reactivity with cellulose or hydroxide ion, the smaller the dimerization. The easiness of the dimerization was thus found to be inversely proportional to the rate of hydrolysis.

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