Очистка углеводородного сырья месторождения Жанажол от метил- и этилмеркаптанов

Abstract

There is considered the oil of «Zhanazhol» oil field in the Aktyubinsk region in thisresearch work, which is classified and composition refers as unique oil. Here are given the physicochemical characteristics of the Zhanazhol oil field, which is characterized by a high content of sulfurcompounds (hydrogen sulphide, mercaptans) and other high molecular weight inert compounds. Itrequires the necessary preparation to meet the requirements of GOST. The fractional compositionis determined the oil of the Zhanazhol oil field, potential content calculated of the fraction fromthe boiling point to 15 0 C, equal to 27,5 % by weight gasoline. And where the demercaptanizationprocess of oil and gasoline are described, which consists in preliminary degassing, thermal dehydration, electrochemical demineralization and stabilization at an oil refinery unit (ORU). The maincharacteristics of oil entering the demercaptanization unit of oil are investigated, where the process of desulfurization of liquefied hydrocarbon gases and deodorization of high boiling hydrocarbongasoline, kerosene, diesel fractions and oils is being carried out. To accelerate the conversion of mercaptides to disulfide oil, an oxidation catalyst of the appropriate concentration was used. To removeunwanted sulfur-containing components, there is used the process of alkalizing the light gasolinefraction, with its preliminary isolation in the distillation column. The isolation of light gasolinefraction markedly reduced the amount of product subject to demercaptanization, thereby reducingcapital investment in the demercaptanization unit. The distillation curve was calculated on the basisof the yields of the fractions at 200 and 300 0 С and the yield of the fraction of b.p. - 150 0 С. For thepurification of the gasoline fraction, the Merox process was used, which took place in several stages.The specific consumption of reagents in the processes of demercaptanization of oil and fractions iscalculated. It is shown that the application of demercaptanization of oil, but of the fraction with aboiling point of 150 0 С leads to a significant technological and economic effect.