STUDY OF THE CATALYTIC HYDRAZINOLYSIS OF HIGHER FATTY ACIDS

Аннотация

In this work, the reaction of hydrazinolysis of higher fatty acid in the presence of an ionite catalyst is
considered for the first time. Synthetic commodity anion exchange resin AB-17-8 was used as a catalyst. Before use,
the anionite was converted to OH-form and its exchange capacity was determined. The experiments were made in the
static conditions in a glass reactor with mixing of the reaction mixture.The reaction of palmitic acid with hydrazine
yielded the corresponding hydrazide. The influence of various factors (quantity of hydrazine hydrate, catalyst, butyl
alcohol, temperature, reaction duration) on the formation of palmitic acid hydrazide was studied. It is shown that
with an increase in the amount of hydrazine hydrate in the initial mixture from 2.0 to 2.52 g per gram of palmitic
acid, the yield of hydrazide increases, and further increase in the concentration of this reagent leads to a decrease in
the selectivity of the process, due to the occurrence of side condensation reactions. Increasing the amount of catalyst
from 2 to 3 g per gram of palmitic acid leads to an increase in the yield of hydrazide. It reveals optimum conditions
of synthesis under which the most palmitic hydrazide yield made 90%. The analysis of the initial substances and the
reaction product was carried out using the photocolorimetric method. As a result, the IR spectroscopic researches of
the mechanism of hydrazinolysis reaction of the palmitic acid with active centers of anion-exchange. It is shown that
the reaction proceeds with the formation of transition complexes on the surface of the anion exchange resin. The
practical value of this work is to develop an effective method of palmitic acid hydrazide preparation