USE OF ULTRASONIC PRETREATMENT IN THE REACTION OF LIQUID AEROBIC OXIDATION OF C11, C14 PARAFFIN HYDROCARBONS IN THE PRESENCE OF (RCOO)3Cr AND (RCOO)2Ni CATALYSTS

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Document Type : Research Article

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1 petrochemistry

2 Institute of Petrochemical Processes named after acad. Y.H.Mammadaliyev of ANAS, Baku, Azerbaijan

Abstract

The article presents the results of liquid-phase aerobic oxidation of tetradecane and undecane in the presence of salts of natural petroleum acids (RCOO)3Cr and (RCOO)2Ni treated by ultrasound with an operating frequency of 26 kHz. The results of paramagnetic analysis of targeted products of the oxidation reaction of the alkane showed that olefins and naphthenic rings are formed in the oxidation process of paraffin hydrocarbons, and the number of OH bonds of the carboxyl group in oxy-fatty acids appears more than in synthetic fatty acids. The induction period of the alkane oxidation process is shortened with the use of catalyst pretreated by ultrasound, which coincides, may be, with change in the degree of oxidation of metal in the catalyst (RCOO)3Cr (Cr3+-Cr6+), and also reduces the reaction time by 2 times and increases the total yield of acids by 5 times. It has been found that the sonicated (RCOO)3Cr catalyst has more active catalytic properties than (RCOO)2Ni.

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Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 01 November 2023

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