Catalysis and petrochemistry

Quantitative patterns during the amidation of triacylglycerols of vegetable oils

 

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L.M. Shkaraputa, L.L. Mitrokhina, L.O. Tyshchenko, L.A. Shevchenko, I.P. Моrozova

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V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine

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ABSTRACT

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The relevance of the study is due to the rapid decrease in oil reserves and an increase in its cost, which stimulates the use of renewable raw materials, in particular vegetable oils for the production of surface-active substances, which are used to intensify oil production and the production of products from various industries. However, there are critically few works devoted to identifying quantitative ratios of amidation processes of vegetable oils. This leads to the implementation of irrational synthesis conditions, the waste of starting materials and time. The article analyzes the difficulties encountered in the quantitative analysis of such processes. An analysis of the quantitative ratios during the amidation of triacylglycerols of sunflower and soybean oils suggests that neglecting the differences between k1 and , k1 and k3 (k1 = k2 = k3) is justified in calculating the estimates of the consumption of starting materials and the yield of target products. Moreover, the error in determining the yield of the target product does not exceed 10 % (sunflower oil) and 13 % (soybean oil), which, taking into account errors during kinetic experiments, the mobility of properties of industrial oils composition, and serious difficulties in the numerical analysis of rigid systems of differential equations, seems completely acceptable. In the presence of the NaOH catalyst, the algorithm for calculating the estimates of the consumption of starting materials and the yield of the target products reduces to determining the preexponents of the rate constant of the non-catalytic amidation of triacylglycerols, building the dependence of the activation energy on the content of NaOH taking into account the ratio E(C) = -RT ln [k (C, T) / k01] and quantitative calculation using the solver ode45.

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KEYWORDS

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amidation, vegetable oils, triacylglycerines, calculation algorithm, estimation of the yield of the target product

REFERENCES

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