Suppression Method Of The Condensation
Reaction During Phenol Liquefaction Of
Woody Material
Author(s)
Q. Wang, N. Mitsumura, Q. Chen, P. Apar, H. Niida, S. Ito,
T. Endo, S. Animesh, H. Kurokawa, K. Sekiguchi
& K. Sugiyama
Abstract
The liquefaction of woody materials in the presence of phenol and acid catalyst
is a promising method to utilize the waste woody materials into phenolic resin.
However, the condensation reaction is a major problem for its practical
applications. In order to suppress condensation reactions, methanol was added to
the liquefaction medium. Even the intense condensation reactions were
suppressed by the addition of 50% methanol (mol% to phenol). The effect of
methanol was further confirmed by the measurement of molecular weight
distribution. In the case of mild condensation, addition of 5% methanol
suppressed the production of the residues. At the same time, the liquefaction
rates overall were faster than the case without methanol. It was inferred that the
existence of methanol lowered the amount of combined phenol which could be
the reaction site of the condensation reaction. On the other hand, larger amounts
of methanol (100%) retarded the liquefaction rate and the consumption rate of
phenol. The actual reaction temperature in the reactor was lower than the setup
temperature of the oil bath when the methanol was added. The investigation of
the IR spectra showed that there were almost no differences between the
functional groups of the liquefied products obtained with and without methanol.
The addition of small amounts of methanol could be applicable because the
disadvantages of methanol addition could be reduced.
Keywords: waste woody materials, liquefaction, phenol, condensation reaction,
suppression method, methanol.
Keywords
Keywords: waste woody materials, liquefaction, phenol, condensation reaction,
suppression method, methanol.
Related Book
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