Oligomerization of C9 hydrocarbon fraction initiated by amino peroxides with cyclic substitute
DOI:
https://doi.org/10.15587/1729-4061.2022.259892Keywords:
petroleum polymer resin, tert-butyl piperidinomethyl peroxide, 2- [4- (tert-butylperoxymethyl) piperazinomethylperoxy]-2-methylpropane, suspension oligomerization, bromine number, oil processingAbstract
This paper investigates the production of hydrocarbon resins by oligomerization in solution and suspension of the C9 fraction of by-products from oil refining. The disadvantage of existing technologies for oligomers by free radical oligomerization is the use of high reaction temperatures. The application of N-replaced amino peroxides as low-temperature initiators and a suspension oligomerization technology can reduce the temperature and duration of the reaction.
The correlation between oligomerization parameters and yield and characteristics of oligomers has been established. Owing to this, it will be possible to set optimal conditions and predict the properties of the resulting products. The high values of the yield and bromine number correlation in oligomerization in solution (–0.98 and –0.95) and suspension (–0.83 and –0.80) indicate the course of the oligomerization reaction.
The main factor influencing oligomerization in solution is the reaction temperature (correlation 0.80). The softening temperature of oligomers is in the range of 349‒353 K and does not depend on the oligomerization conditions in the solution (correlation indicator 0.18).
Suspension oligomerization in the studied intervals does not depend on temperature (correlation −0.08) and initiator concentration (correlation 0.40). It is proved that in the studied intervals of variables, the yield of oligomers depends on the duration of the reaction (correlation 0.88). The color indicator of suspension oligomerization products at the studied intervals varies slightly and is 20–30 mg I2/100 ml.
The established optimal conditions make it possible to effectively use oil refining by-products by synthesizing light oligomers.
Under the established optimal conditions, the product yield is 22.7 % with oligomerization in solution and 19.4 % with suspension oligomerization.
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