Purification procedures for synthetic dyes

Freeman, Harold S.; Hao, Zengzhou; McIntosh, Stanley A.; Posey, James C.; Hsu, Whei-Neen

doi:10.1016/0143-7208(90)85015-g

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…The three azo disperse dyes were obtained free of dispersing agent (in press‐cake form) from a commercial dye manufacturer. Dye purifications were performed using flash column chromatography . In each case, a glass column (2.5 cm diameter × 60 cm length) was packed, with glass wool at the bottom, followed by a 2 cm layer of sand (catalogue number 525500; Fisher Scientific, USA), a 30 cm layer of silica gel (Selecto Scientific, USA, particle size 32–63 μm, catalogue number 132824), a 2 cm layer of dye coated silica gel (prepared by dissolving 0.5 g dye in 10 mL of ethyl acetate, adding 5 g silica gel and evaporating to dryness), and a 2 cm layer of sand at the top.…”

Section: Methodsmentioning

confidence: 99%

Purification and characterization of three commercial phenylazoaniline disperse dyes

Umbuzeiro

Szymczyk

et al. 2017

Coloration Technology

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Although tons of disperse dyes are used worldwile, little information on their ecotoxicity is available. While in silico models can be used to predict their ecotoxicity, experimental results from Daphnia can show significantly higher toxicity than predicted. Thus the objective of this work was to extend the knowledge base in this area by evaluating the ecotoxicity of three widely used disperse dyes and comparing the results to predicted values. Bearing in mind that generating ecotoxicity data on azo disperse dyes is complicated because they are not readily found as homogeneous compounds, we employed chromatographic methods to purify three commercially dyes C.I. Disperse Violet 93, Blue 291, and Blue 373 already found in the aquatic environment. No acute toxicity was observed for Daphnia similis. These results seems to be in general agreement when compared with ECOSAR predicted values. We hypothesize that differences in Kow values could explain the variations in results.

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Section: Methodsmentioning

confidence: 99%

Purification and characterization of three commercial phenylazoaniline disperse dyes

Umbuzeiro

Szymczyk

et al. 2017

Coloration Technology

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“…Absorption spectra were recorded using an Agilent Technologies Cary 300 UV–vis spectrophotometer coupled with Cary Win UV software, using acetone as the solvent. Dye purification was conducted using flash column chromatography …”

Section: Methodsmentioning

confidence: 99%

Approach to Waterless Dyeing of Textile Substrates—Use of Atmospheric Plasma

Zaidy

Vacchi

Umbuzeiro

et al. 2019

Ind. Eng. Chem. Res.

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The international textile wet processing industry produces large amounts of wastewater, which if discharged into the environment could have adverse effects on aquatic life and drinking water. Efforts to reduce wastewater production include the development of chemical finishing technology that employs atmospheric plasma to apply repellent finishes to textile fibers. With this in mind, the use of atmospheric plasma technology to apply dyes to textile fibers was examined in the present study, as no water is needed for the dyeing process. Our work involved the design and synthesis of suitable dyes for waterless technology and examination of their utility for dyeing cotton, nylon, and polyester (PET). Results indicated that the obtained azo dyes having one or two acrylate groups gave good bonding to and good technical properties on cotton, nylon, or PET following spray application and plasma treatment. Dyes that worked best were also nonmutagenic in the Ames test.

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“…The effect on mutagenicity caused by incorporating an alkoxy substituent into the structure of a watersoluble disazo dye was investigated. The results indicated that, although bulky alkoxy groups were useful in lowering the mutagenicity of certain analogues of CI Direct Black 17, the decrease observed was less than that noted for a series of monoazo disperse dyes [25]. textiles [33,34] provide information on the sources and conservation of water and the effects of common contaminants on textile processing.…”

Section: Nhzmentioning

confidence: 99%

Developments in direct dyes for cellulosic materials

Shore

1991

Review of Progress in Coloration and Related Topics

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Purification procedures for synthetic dyes

Cited by 10 publications

References 5 publications

Purification and characterization of three commercial phenylazoaniline disperse dyes

Purification and characterization of three commercial phenylazoaniline disperse dyes

Approach to Waterless Dyeing of Textile Substrates—Use of Atmospheric Plasma

Developments in direct dyes for cellulosic materials

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