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Abstract
The unsaturated gases obtained in processing petroleum cuts in catalytic and thermal crackers are used in the refinery mainly for the production of butane-butylene cut (BBC) with a content of organic sulfur compounds up to 0.02% by weight. This cut is used as feed to units for the sulfuric acid alkylation of isobutane. The propane-propy!ene cut (PPC) that is obtained at the same time, with a propylene content up to 50% by weight, has not yet found any effective applications, and it is used mainly (up to 85% of the resources) as domestic or industrial fuel. At the same time, the petrochemical industry is experiencing an acute shortage of propylene. The yield of PPC, relative to the total volume of unsaturated feed of the gas fractionation units (GFUs), is about 30%.
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