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Bismuth gluconic acid oxidation

Wenkin, M., Touillaux, R., Ruiz, P., Delmon, B., and Devillers, M. (1996) Influence of metallic precursors on the properties of carbon-supported bismuth-promoted palladium catalysts for the selective oxidation of glucose to gluconic acid. Appl. Catal., A, 148, 181-199. [Pg.187]

When modifying the Pt catalyst by addition of bismuth or lead, a significant change in selectivity occurs. Oxidation of the primary terminal alcohol moiety in gluconic acid is no longer the dominating reaction. Instead oxidation of the a-hydroxy group, next to the carboxylic acid takes... [Pg.37]

As with platinum, the palladium-catalyzed oxidation of anomeric hydroxyl groups in aldoses is a rather selective process.84 The influence of pH in the Pd-catalyzed oxidation of glucose has been studied. It was observed that the gluconic acid formed, in its free form, reversibly inhibits the oxidation process in acidic media.85 The oxidation of D-glucose has been performed with palladium-on-alumina and with bismuth-containing palladium-on-charcoal in water.85 The selectivity in the air oxidation of... [Pg.333]

Promoting effects of bismuth in carbon-supported bimetallic Pd-Bi catalysts for the selective oxidation of glucose to gluconic acid... [Pg.517]

Glucose can be oxidized to gluconic acid by oxygen (4.38) in the presence of palladium on alumina, a palladium-bismuth catalyst, or a platinum-bismuth catalyst in 99-100% yield.186... [Pg.82]

Heinen et al. [35] investigated the oxidation of D-fructose on Pt/C catalyst at 30 °C and pH 7.3. Oxidation of both the C, primary alcohol and the C5 secondary alcohol occurred. The reaction stopped at ca 80 % conversion giving mainly 2-keto-D-gluconic acid (45% selectivity) and D-t/n-eo-hexo-2,5-diulose or 5-ketofructose (27 % selectivity). In the presence of bismuth-promoted catalysts selectivity to the former was slightly increased. This was attributed to the complexation by bismuth of the y9-o-fructofuranose stmcture via the c/s-diol functions. [Pg.514]

The Complex Role of Bismuth as Promoting Element to Inhibit Deactivation of Pd-Bi/C Catalysts in the Selective Oxidation of Glucose to Gluconic Acid... [Pg.295]

See other pages where Bismuth gluconic acid oxidation is mentioned: [Pg.81]    [Pg.562]    [Pg.50]    [Pg.517]    [Pg.518]    [Pg.522]    [Pg.391]    [Pg.391]    [Pg.394]    [Pg.495]    [Pg.509]    [Pg.509]    [Pg.300]    [Pg.357]    [Pg.73]    [Pg.56]    [Pg.11]    [Pg.174]   
See also in sourсe #XX -- [ Pg.514 ]



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Bismuth Bismuthic acid

Bismuthic acid

Bismuthic oxide

Bismuthous oxide

Glucon

Gluconate

Gluconic

Gluconic acid

Oxidation gluconate

Oxidation gluconic acid

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