Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Oxidation hydroxy acids, lead modified

While examining the effect of modified catalysts on aldaric acid formation it was found that Pt/C catalysts that were treated with lead salts were extremely selective for the oxidation of the hydroxy group next to the initially formed carboxylic acid to give 2-keto gluconic acid. 2.83 xhese catalysts also promote the selective oxidation of a number of other a-hydroxy acids. For example, lactic acid has been oxidized to pyruvic acid in greater than 95% yield (Eqn. 21.27).83 Similar results have been observed with lead doped Pd/C catalysts. 2,75... [Pg.562]

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]

See other pages where Oxidation hydroxy acids, lead modified is mentioned: [Pg.210]    [Pg.302]    [Pg.126]    [Pg.259]    [Pg.938]    [Pg.175]    [Pg.745]    [Pg.745]    [Pg.169]    [Pg.260]    [Pg.315]    [Pg.641]    [Pg.230]    [Pg.981]   


SEARCH



1- Hydroxy-2- - -3-oxid

Acid lead

Hydroxy acid modifying

Hydroxy acids, oxidation

Hydroxy oxides

Hydroxy-, oxidation

Lead oxidation

Modified oxides

Modifier acidic

Modifier oxide

Oxidation modified

© 2024 chempedia.info