Shale oil processing method

Abstract

The invention discloses a shale oil processing method, comprising the steps of: segmenting shale oil into light components and heavy components, leading the heavy components and hydrogen to pass through an up-flow type hydrogenation reactor, leading an effluent and the light components as well as hydrogen to pass through a conventional hydrorefining reactor for reaction, and separating and distilling a hydrorefined effluent to obtain a light product. According to the method disclosed by the invention, the shale oil is firstly segmented into the light components and the heavy components so as to make metal, colloids and other easily precipitated impurities in the shale oil enter the heavy components, and then the characteristic of the up-flow type reactor is utilized to uniformly precipitate the colloids, the metal and other pollutants in a catalyst bed, so that the excessive increase of the pressure drop in the catalyst bed is effectively slowed down; a material flow in which most of impurities are removed is subjected to the conventional hydrorefining, on the one hand, sulfur, nitrogen and other impurities in the shale oil can be removed, on the other hand, the operating cycle of the hydrorefining catalyst can be prolonged, and thus, an ideal processing effect is achieved.

Description

technical field [0001] The invention relates to a processing method of shale oil, in particular to a combined process of shale oil fractionation and hydrofining. Background technique [0002] Shale oil is a liquid product obtained by thermal decomposition of kerogen in oil shale. In addition to a large amount of unsaturated hydrocarbons, shale oil also contains many non-hydrocarbon compounds such as sulfur, nitrogen and oxygen. Unsaturated hydrocarbons and non-hydrocarbon compounds in shale oil are the main reasons for the increase of oil colloid and the formation of sediment, resulting in poor stability and black color; in addition, shale oil often entrains some metals during upstream processing Impurities. Therefore, when producing light products from shale oil, it is necessary to remove non-hydrocarbon compounds, saturated olefins, and metals to ensure product quality. [0003] US4338186 discloses a method for processing shale oil. Firstly, the whole distillate shale oi...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: complex process flow and high investment; at the same time, due to the use of hydrochloric acid to produce acid slag, which pollutes the environment, it is necessary to use acid-resistant materials

The disadvantages of this method are: too many hydrogenation processes, high hydrogen consumption, high operating costs, and high construction investment

Its disadvantages are: the use of two-stage all-hydrogen technology, high hydrogen consumption, high operating costs, high construction investment; and the fluidized bed technology is not mature enough

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