Aluminum oxide is the most famous
promoters for nickel (1) several
publication were given in the literature
which recommended the use of Ni/Al2O3
as catalyst. Some of them recorded partial
reduction of nickel in presence of
aluminum oxide promoters. Systematic
studies on Ni/Al2O3 catalyst Armstrong
and Hilditch (2). These are a lot of works
(3) used Cr2O3 as promotes for nickel in
hydrogenation dehydrogenation
processers which founded as good
promoters due to its high melting point, an
indication for the efficiency of this catalyst
for the hydrogenation dehydrogenation
estrifications processes was. given by
Sadek , Taylor (4), wassel and Amira
Different metal oxide promoters such as
CoO, Fe2O3, CuO, Mno and ZrO2 for
nickel catalyst to produce a binary one
were tried.
The activity of these catalysts varies
greatly not only according to the method
of it is preparation, but also according to it
is composition.
Estrification of benzyl alcohol with acetic
acid catalyzed by amberlyst-15 (cationexchange,
resin) (5) was carried out in a
batch reactor in the liquid phase in the
temperature range from 328-359 C0 and at
1 atm. The reaction rate increased with
increase in catalyst concentration and
reaction temperature. Resin particle size
and stirrer speed had virtually no effect on |
