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Zeolite‐catalyzed three‐phase hydration of α‐pinene
Author(s) -
ChuTsin Liu,
QingZhi Cheng,
Zheng Yu,
Ben Shen
Publication year - 1986
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19860040309
Subject(s) - chemistry , pinene , camphene , kinetics , catalysis , zeolite , limonene , activation energy , adsorption , organic chemistry , chromatography , physics , quantum mechanics , essential oil
In this paper, the kinetics, the product distributions and the corresponding reactions of some products of zeolite‐catalyzed hydration of α‐pinene have been studied. The results indicate: 1. α‐Pinene is hydrated mainly to borneol, but isomerizations always accompany the hydration and camphene and limonene are the main olefines formed. 2. The disappearance of α‐pinene follows the first‐order kinetics, of which the rate constants, the activation energy as well as the activation entropies have been calculated. 3. A probable mechanism has been proposed, in which the hydration of α‐pinene through two equilibrating adsorbed intermediates, which, via three pathways, lead to derivatives of fenchane, bornane and p ‐menthane respectively. The distributions of the three pathways have been examined and appear to be determined by the stability of the adsorbed intermediates themselves