To create a chemical-technological complex for the joint processing of cracked gases and pyrolysis gases, the technique of its design was developed. Based on the design capacity of the pyrolysis and cracking units, mass flows of cracked gases and pyrogas entering the chemical-technological complex have been calculated. A scheme has been developed for the proposed complex. To reduce the dimension of the design task, the whole complex was divided into a separate region. Based on the stoichiometric and kinetic models, the calculation of material balances for all processes included in the largest ethylene region has been carried out. The technological parameters were taken from the operated industrial units and processes on the stage of design. The industrial productivity of reactor elements by the targeted products has been determined.

Possible variants of gasoline pyrolysis intensification, i.e., implementation of the process with separation and reinjection of the ethane or propane formed into the pyrolysis retort for further conversions, and recirculation of both hydrocarbons simultaneously, i.e., joint gasoline, ethane, and propane pyrolysis, are studied. The yields of the target products (ethylene and propylene) in all three cases are compared with the yields of hydrocarbons in the industrial process without recirculation. The profit an enterprise can get by applying this method is calculated.

Results of investigating the spectral properties of InP-basedpolymer composites are given. It is shown that the effects observed in the IR and UV absorption spectra are due to the radiation of the supermolecular structure and to the degree of crystallinity of the polymeric matrix.

This paper describes the scheme that has been developed for the optimal control of the process of pyrolysis for different types of hydrocarbon feedstock in the four-flow pyrolysis furnace at the Sumgait Ethylene-Polyethylene plant; the scheme is based on the use of a complex parameter of the process, i.e., the pyrolysis intensity function. The algorithm for this control has been constructed. In the paper, the results of optimal control of the process of propane pyrolysis, ethane pyrolysis, and pyrolysis of ethane together with the butane-butylene fraction are presented in accordance with the scheme being developed using the intensity function that corresponds to each process. Optimal values of the intensity function were found from the results of calculations carried out using the mathematical model of each process. The extended expression for the intensity function has been formulated and, with its use, it is possible to control the process both in the case of the change in the flows of feedstock and steam and the change in the inlet temperature, as well as in the case of the change in the feedstock composition.

Представлена разработанная схема оптимального управления процессом пиролиза разных видов углеводородного сырья в четырехпоточной пиролизной печи сумгаитского завода “Этилен–Полиэтилен”, основанная на использовании комплексного параметра процесса – функции жесткости. Составлен алгоритм этого управления. Представлены результаты оптимального управления процессом пиролиза пропана, этана и этана совместно с бутан-бутиленовой фракцией по разработанной схеме с помощью соответствующей каждому процессу функции жесткости. Оптимальные значения функции жесткости находились на основании результатов расчетов, проведенных по математической модели каждого процесса. Составлено обобщенное выражение функции жесткости, с помощью которого возможно управлять процессом как в случае изменения расходов сырья, пара и входной температуры, так и при изменении состава сырья.

A mathematical model of oligomerization of propane–propylene cut with consideration of deactivation of the catalyst was developed. The optimum process parameters that allow obtaining the components of different brands of oil were determined. A kinetic model of hydrogenation of oligomers was formulated for production of white oils.

A general technique was developed for optimal designing pyrolysis with feedback of hydrocarbons C2-C4 and their mixtures. Based on this technique, we carried out a study of industrial processes of pyrolysis of propane, ethane, and ethane with the butane-butylene fraction, developed their complete mathematical models that reflected the peculiarities of recycling, and on the basis thereof we defined optimal regimes of governing by these processes that differed significantly from those used in industry. We suggested new ways of governing by all three processes. The use of these ways will allow getting a significant profit by “Ethylene-Polyethylene” plant (Sumgayit). We demonstrated advantages of carrying out pyrolysis of various raw materials with recycling of unreacted raw materials compared with its conducting without recycling.