Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 12, pp. 1832−1834.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © A.F. Gogotov, Do Chiem Tai, L.V. Kanitskaya, V.K. Stankevich, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 12,
OF ELECTROCHEMICAL INDUSTRY
New Approach to Development of Phenolic
Thermopolymerization Inhibitors for Processing
of Pyrolysis Products
(byExample of Pyrocatechol)
A. F. Gogotov
, Do Chiem Tai
, L. V. Kanitskaya
, V. K. Stankevich
Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia
Petrovietnam University (PVU), Petroleum Institute Tower, Hanoi, Vietnam
Baikal State University of Economics and Law, Irkutsk, Russia
Received December 17, 2013
Abstract—New approach to processing of phenols to enable their use as thermopolymerization inhibitors of
unsaturated components of pyrocondensates is suggested. The method consists in a mild thermal treatment of a
mixture of phenol, solvent, and kraft terpentine. A treatment of this kind results in that any (un)substituted phenol
acquires inhibiting properties that compare well with those of the best phenolic inhibitors.
One of technological procedures of modern pyrolysis
and petrochemical industries is the use of inhibitors of
undesirable polymerization [1–3]. A rather wide variety
of individual substances and formulations and, in
particular phenolic compounds  are used as inhibitors
in rectiﬁ cation of liquid pyrolysis half-products in
manufacture of ethylene-propylene and benzene.
Isobornylphenols have been tested as high-efﬁ ciency
thermopolymerization inhibitors [5, 6].
Isobornylphenols as representatives of a new
generation of sterically hindered phenol with bulky
substituents are produced by selective ortho-alkylation
of phenols in the presence of (PhO)
Al or (i-PrO)
catalysts . Use of these homogeneous organoaluminum
catalysts requires their subsequent neutralization, which
yields wastewater, and isolation of target products from
reaction mixtures and their puriﬁ cation; as a result, the
synthesis technology becomes more complex. Already
tested terpene-phenols excellently work as inhibitors
only in the form of individual compounds after their
isolation from the reaction mixture and puriﬁ cation by
recrystallization or vacuum distillation. The inhibition
efﬁ ciency sharply decreased if these inhibitors are used
as a product mixture obtained in the reaction without
isolation. Therefore, a search for a new simpliﬁ ed
method of their production is necessary to enable wide
industrial application of effective phenolic inhibitors.
In modern technologies, up to 6% of expenditure
for synthesis of target products is accounted for
inhibitors . Therefore, development of effective and,
simultaneously, economical inhibitors is a very urgent
Phenolic compounds with bicyclic (isobornyl)
substituents are synthesized with the use of individual
terpene compounds whose isolation from starting
mixtures (terpentine) results in that the cost of both half-
products and target products sharply grows.
The goal of our study is to develop a new method to
produce effective inhibitors from various phenols and a
starting mixture of terpenes (terpentine).
We report in this communication a simple method
for obtaining of effective “inhibiting systems.” The