Liquefied petroleum gas-coke gasoline hydrogenation combined process method

Abstract

The invention discloses a liquefied petroleum gas-coke gasoline hydrogenation combined process method, which comprises the following contents: coke gasoline undergoes a hydrogenation reaction in a coke gasoline hydrogenation reaction stage; the efflux of the coke gasoline hydrogenation reaction stage is mixed with the liquefied petroleum gas to enter a liquefied petroleum gas hydrogenation reaction stage; and the reaction efflux of the liquefied petroleum gas hydrogenation reaction stage is subjected to separation to obtain hydrogenated liquefied petroleum gas and hydrogenated coke gasoline. Compared with the prior art, the method disclosed by the invention is favorable for dissipation of reaction heat, lowers reaction temperature, reduces the influences of temperature on reaction balance and improves conversion rate; and the method reduces carbon accumulation of the catalyst, prolongs the single-pass service life of the catalyst and can obtain high-quality hydrogenated coke gasoline and hydrogenated liquefied petroleum gas at the same time.

Description

technical field [0001] The invention relates to a hydrogenation treatment process, more specifically, a combined process organically combining two processes of liquefied petroleum gas hydrogenation treatment and coker gasoline hydrogenation treatment. Background technique [0002] As crude oil becomes heavier and its processing depth increases, delayed coking, as one of the main processes in heavy oil processing, plays an important role. Due to the high content of unsaturated hydrocarbons and colloids, as well as high content of impurities such as sulfur and nitrogen, the coked gasoline obtained by the delayed coking process is corrosive and poor in stability, which limits its application. Coked gasoline must be hydrorefined before it can be used as a gasoline blending component, catalytic reforming raw material or cracking ethylene raw material. [0003] With the development of oil refining industry, especially the continuous improvement of catalytic cracking technology, p...

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Problems solved by technology

[0016] Aiming at the deficiencies in the prior art, the present invention provides a 4 The combined process of distillate and coker gasoline hydrotreating, the inventive method has solved C on the one hand 4 The stability of the distillate hydrogenation process, at the same time solves the high content of dilute hydrocarbons in the hydrocoked gasoline obtained by the ordinary coker gasoline hydrogenation unit, and it is difficult to meet the quality requirements of catalytic reforming and steam cracking raw materials

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