Southern Research Station

Title: Kinetics on cocondensation between phenol and urea through formaldehyde III

Author: Yoshida, Yasunori; Tomita, Bunichiro; Hse, Chung-Yun

Date: 1995

Source: Mokuzai Gakkaiski, Vol. 41(7): 652-658

Description: Concurrent reactions involving cocondensation and self-codensation were determined simultaneously in the reactions of o- and p-methylophenol, respectively, with urea. The results were as follow:
(1) The reactivity ratio of self-condensation to cocondensation could be determined by equation [4] for the concurrent reaction of monomethylolphenol with urea.
(2)For the reaction of o-methylolphenol with urea in water, it was found that the second-order rate constant of the self-condensation due to the formation of a o,p-methylene linkage is approximately ten times greater than that of the cocondensation between o-methylolphenols with urea, The reaction solvent of the mixture of water and dioxane reduced the ractivity ratio.
(3) For the reaction of p-methylolphenol with urea using a water/dioxane solvent, it was suggested that the rate constant of the cocondensation is approximately four times greater than that of the self-condensation between p-methylolphenols.

Keywords: 

View and Print this Publication (895 KB)

Publication Notes: 

• 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.

 Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

Citation

Yoshida, Yasunori; Tomita, Bunichiro; Hse, Chung-Yun  1995.  Kinetics on cocondensation between phenol and urea through formaldehyde III.   Mokuzai Gakkaiski, Vol. 41(7): 652-658