Improving the efficiency of high-temperature processes for producing lower olefins via deep-processing of by-products

Processes for producing lower olefins are critically examined. It is noted that pyrolysis of various types of hydrocarbon is still the main process of obtaining ethylene and propylene, and is accompanied by the formation of considerable amounts of by-products, such as liquid pyrolysis products. We present an analysis of domestic and foreign scientific, technical, and patent information pertaining to the rational use of petrochemical production by-products, aimed at obtaining hydrocarbon (petroleum) resins. We consider the raw materials involved in obtaining the resins, and generalize data on existing methods of obtaining resins using thermal, initiated, and ion (catalyst) polymerization

Modification of Aliphatic Petroleum Resin by Peracetic Acid

This work demonstrates the possibility of obtaining modified aliphatic resin (PRC5) by means of petroleum resin oxidation by peracetic acid. We have experimentally determined oxidation conditions that lead to producing resin with maximum epoxy and acid numbers. Ratio of "oxidative system: PRC5" is 0.5:1, process duration is 2 hours. The modified resin structure is determined by IR and NMR spectroscopy

Oligomerization of Dicyclopentadiene Fraction Using Monosubstituted Titanium Chloride as a Catalyst

The purpose of this study is to investigate the dicyclopentadiene fraction of liquid pyrolysis product oligomerization with the use of the modified catalytic system based on titanium alkoxides. The choice of reaction catalyst is specified by searching the ways of obtaining petroleum resins with the improved performance characteristics and the possibility of low-temperature polymerization. The use of monosubstituted titanium chloride as a catalyst allows obtaining light resins, films on the base of which are smooth, glossy and have good technical characteristics: adhesion 1 point, resilience 10 cm

Study of Petroleum Resins Modification by Ethanolamins

Possibilities of synthesis and properties of the products of the ozonated petroleum resins modification by ethanolamines was considered. It is founded that ethanolamines interact both with decomposition products of the ozonized groups obtained from ozonated resins, and directly with the ozonized groups themselves. The obtained modified petroleum resins can be used as adhesive and film-forming components in paint materials

Kinetics of Petroleum Resin Epoxidation by Peracetic Acid

The in situ oxidation of the petroleum resin under soft condition was investigated. The oxidation was carried out by using hydrogen peroxide and acetic acid as the oxidants, and sulphuric acid as a catalyst for in situ formation of the peracetic acid. The infrared spectroscopy analysis shows the changes in the molecular structure: the amount of the epoxy, hydroxyl and carbonyl groups increases and the number of unsaturated bonds decreases. The new method for the determination of the reaction rate constant was presented. For the determination of the reaction rate constants the relative intensity of absorption band in the area of epoxy and carboxyl groups vibration was used. Obtained data are in a very good correlation with the reaction rate constants obtained with the epoxy and acid number valuation. That allows to conclude the validity of using presented algorithm. Kinetic calculation indicates the occurrence of the oxidation reaction by the first order. According to average reaction rate constant the process has a high selectivity for epoxy groups

Research of the Formation of Regularities Siloxane Norbornene Derivatives by Thermal Diels-Alder Reaction

The methods of chromatography-mass spectrometry and 1H NMR-spectroscopy were used to study the reaction between dicyclopentadiene and vinyltriethoxysilane. The main reaction products are exo- and endo-isomers bicycle [2.2.1] hept-5-en-2-yl(triethoxy)silane. The overall yield of isomers is 55% of the load components. Co-products are the alkoxysilyl derivatives of dicyclopentadiene. Also the authors of the article paid attention to the problems of the time and temperature reaction, and ratios of starting components on chemical yield

Mathematical modeling of the reaction system of dicyclopentadiene polymerization

Based on the mathematical model of dicyclopentadiene polymerization the authors have proposed the mathematical model of the polymerization reactor. The reactor for producing polydicyclopentadiene was designed. It is operated in adiabatic and isothermal temperature conditions. The maximum permissible monomer concentration in toluene solution was determined. It was shown that the polymerization products in different reactors have the same molecular mass and different molecular weight distribution