On the palladium-on-charcoal disproportionation of rosin

Zhan-Qian Song; Eugene Zavarin; Duane F. Zinkel

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On the palladium-on-charcoal disproportionation of rosin

Informally Refereed

Authors:

Zhan-Qian Song, Eugene Zavarin, Duane F. Zinkel

Year:

1985

Type:

Miscellaneous Publication

Station:

Forest Products Laboratory

Source:

Journal of wood chemsitry and technology. Vol. 5, no. 4 (1985): pages 535-542.

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Abstract

Changes in the composition of gum rosin during disproportionation in the presence of 5% palladium-on-charcoal have been determined by gas chromatography. The principal reaction product was dehydroabietic acid. The exocyclic vinyl group of the pimaric/isopimarictype resin acids was hydrogenated completely. Only a small amount of dihydroabietic acids was formed. Eight dihydro resin acids were identified. No tetrahydro resin acids were observed.

Keywords

Charcoal, emulsifiers, palladium, resin acids, rosin, dehydroabeitic acid

Citation

Song, Zhan-Qian; Zavarin, Eugene; Zinkel, Duane F. 1985. On the palladium-on-charcoal disproportionation of rosin. Journal of wood chemsitry and technology. Vol. 5, no. 4 (1985): pages 535-542.