Decoloration of Natural Coloring Matter with Sodium Percarbonate

Ohura, Ritsuko; Katayama, Akira; Takagishi, Toru

doi:10.1177/004051759106100410

Cited by 17 publications

(1 citation statement)

References 3 publications

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“…Effect of H 2 O 2 . Considerable attention has focused on the use of hydrogen peroxide as the active oxidant for several commercial and industrial processes. − The destructive oxidation of organic dyes with H 2 O 2 has been studied, ,, and several species are believed to be responsible for decolorizing colored organic compounds. These include free radical species such as HO • , HOO • , or O 2 -• . , However, the mechanism for dye destruction with H 2 O 2 is still in question.…”

Section: Discussionmentioning

confidence: 99%

Decomposition of Pinacyanol Chloride Dye Using Several Manganese Oxide Catalysts

1997

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The decomposition of the cyanine dye, pinacyanol chloride, has been studied using hydrogen peroxide and several mixed valent manganese oxide catalysts in aqueous, alkaline solution at room temperature. These catalysts belong to a class of porous manganese oxides known as octahedral molecular sieves (OMS). The most active catalysts were those of Fe 3+ -, Cr 3+ -, and Co 2+ -doped OMS-2. Rates of reaction were found to be first-order with respect to the dye. The highest reaction rates were observed when no H 2 O 2 was present. Reactions were studied at pH ) 6-11, which caused variations in the catalytic activity. The decomposition of the dye was examined using varying amounts of the catalysts, which showed the dye decomposing activity to be proportional to the amount of catalyst. X-ray diffraction studies showed that no changes in the catalyst structure occurred, implying that these reactions are surface controlled.

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Section: Discussionmentioning

confidence: 99%

Decomposition of Pinacyanol Chloride Dye Using Several Manganese Oxide Catalysts

1997

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Crystal and Molecular Structure of Rubidium Peroxodicarbonate Rb₂[C₂O₆]

Dinnebiér

Vensky

Jansen

2003

Chemistry A European J

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We report the crystal structure of rubidium peroxodicarbonate, which was synthesized by electrocrystallization at T=257 K, from laboratory X-ray powder diffraction data. The compound crystallizes in the monoclinic space group P2(1)/c with four formula units per unit cell and cell parameters of a=7.9129(1), b=10.5117(1), c=7.5559(1) A, beta=102.001(1) degrees, and V=614.75(1) A(3). The packing can be considered as a strongly distorted CsCl type of structure. The conformation of the peroxodicarbonate anion was found to be planar (C(2h) symmetry), in contrast to the staggered conformation of the peroxodicarbonate anion in the respective potassium peroxodicarbonate. The different conformation is attributed to packing effects.

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