Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Richard W. Hemingway; W.E. Hillis
    Date: 1971
    Source: TAPPI 54(6):933-936
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.1 MB)

    Description

    Examination of the rates of hydrolysis of different ellagitannins under conditions comparable with cold soda and alkaline-groundwood pulping processes showed that some ellagitannins are notably resistant to hydrolysis. The rate of hydrolysis was dependent upon the pH and tempemture of the solution and particularly upon the structure of the compound. Decarboxylation of gallic and ellagic acids was a major reaction under conditions comparable with kraft and soda pulping processes. Gallic acid was much more stable than ellagic acid. There was little decarboxylation of gallic acid in NSSC pulping liquors. Ellagic acid was decarboxylated to high yields of 2,2',3,3',4,4' hexahydroxydiphenyl under kraft and soda pulping conditions. There was less extensive but significant decarboxylation of ellagic acid under NSSC pulping conditions.

    Publication Notes

    • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hemingway, Richard W.; Hillis, W.E. 1971. Behavior of ellagitannins, gallic acid, and ellagic acid under alkaline conditions. TAPPI 54(6):933-936

    Keywords

    Eucalyptus, groundwood pulping, neutral sulfite pulping, soda pulping, sulfate pulping, reactions (chemical), hydrolosis, decarboxylation, pH, temperature, carboxylic acids, organic acids, phenols, tannins, ellagic acid, ellagitannins, gallic acid

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page