How to use ethylene tar

Abstract

The invention belongs to the technical field of petroleum refining, and particularly relates to a utilizing method of ethylene tar. The utilizing method of the ethylene tar comprises the following steps that after Shengli crude oil is evenly mixed with the ethylene tar, and the Shengli crude oil and the ethylene tar enter a crude oil distillation device to be distillated; and firstly, cut fractions of gasoline and diesel oil are cut through atmospheric distillation, and then, cut fractions of diesel oil, wax oil and residual oil are cut through reduced pressure distillation. According to the utilizing method of the ethylene tar, the yield of light oil and the total distillation yield of the Shengli crude oil are improved, and products of all obtained cut fractions are not affected, so that all cut fractions can be subjected to secondary operations including hydrogenation, catalytic cracking, high-pressure hydrogenation, cocking and the like according to the production process of an existing refinery plant, and the production technique condition and process are not badly affected; machining steps are easy, devices and catalysts are not needed to add, the operational condition is not needed to change, production cost is low, and economical benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining, and in particular relates to a method for utilizing ethylene tar. Background technique [0002] Ethylene tar is a by-product of ethylene production, and it is a high-temperature condensation product of ethylene cracking raw materials and products in the steam cracking process, accounting for about 15% of ethylene production. The initial boiling point of ethylene tar is 170-260°C, the final boiling point is >600°C, generally 600-700°C, and belongs to the heavy fraction range. Ethylene tar is composed of various alkanes, C8-C15 aromatics, aromatic olefins, and heterocyclic compounds containing N, S, O and other elements, and its density (20°C) is greater than 1.0g / cm 3 , Low content of impurities such as sulfur and nitrogen, basically no metal impurities. At present, ethylene tar is mainly used as fuel oil, the overall utilization rate is not high, and the economic value is low, and...

AI Technical Summary

Problems solved by technology

For example, in the Chinese patent document CN101376068A, it is disclosed that the light oil product yield is improved by using a vacuum flashing device, but there are problems of high investment and ineffective effect.

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