Kinetic Model of the Process of Polycondensation of Concentrated Phenols of Coal Tar with Formaldehyde-Reference-Cited by-同舟云学术

Kinetic Model of the Process of Polycondensation of Concentrated Phenols of Coal Tar with Formaldehyde

Published:2023-06-01 Issue:2 Volume:17 Page:339-346
ISSN:1996-4196
Container-title:Chemistry & Chemical Technology
language:
Short-container-title:ChChT

Author:

Gunka Volodymyr, ,Demchuk Yuriy,Drapak Iryna,Korchak Bohdan,Bratychak Michael, , , , ,

Abstract

Phenolformaldehyde resins were obtained by polycondensation of concentrated phenols with formaldehyde in the presence of hydrochloric acid. Concentration of phenols is carried out by treating the phenolic fraction of coal tar with an aqueous solution of sodium hydroxide followed by neutralization of water-soluble phenolates with hydrochloric acid. The kinetic dependences of resin yield and softening temperature on the duration of the process at 333, 353, and 373 K were obtained. The order of the reaction was determined and the effective activation energy of this process was determined by a graphical method. In the interval 333-373 K for polycondensation reactions, the equation of the dependence of the resin yield on the temperature and duration of the process was obtained.

Publisher

Lviv Polytechnic National University

Subject

General Chemical Engineering,General Chemistry

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