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): Yasunori Yoshida; Bunichiro Tomita; Chung-Yun Hse
    Date: 1995
    Source: Mokuzai Gakkaiski, Vol. 41(6): 555-560
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (820 KB)

    Description

    The chemical kinetics of the concurrent reactions of 2,4,6-trimethylolphenol with urea, where o- and p-methylol groups reacted simultaneously with urea, were analyzed on four kinds of catalysts: namely, sulfuric acid, hydrochloric acid, nitric acid, and oxalic acid. The results were summarized as follows:
    (1) assuming that each reaction follows the second-order reaction, the reactivity ratio (K=ko/kp) of the o- to p-methylol group could be obtained from the kinetic plots of equation [5] within small errors.
    The reactivity ratios were determined to be 0.066 to 0.075 by the least-square method for four kinds of acid catalysts.
    (3) The reactivity ratio of the pseudo-first-order rate constants obtained by competitive cocondensations under the coexistence of o- and p-methylolphenols with a sulfuric acid catalyst was found to be almost identical with that obtained by the cocncurrent cocondensation of the trimethylolphenol.

    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

    Yoshida, Yasunori; Tomita, Bunichiro; Hse, Chung-Yun. 1995. Kinetics on cocondensation between phenol and urea through formaldehyde II. Mokuzai Gakkaiski, Vol. 41(6): 555-560

    Keywords

    cocondensation, urea, methylolphenol, 2, 4, 6-trimethylolphenol, kinetics, reactivity ratio, catalyst

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/24343