Flexible shale oil hydrocracking process

Abstract

The invention discloses a flexible shale oil hydrocracking process. After the shale oil raw material is subjected to hydrocracking pretreatment, gas-liquid separation is carried out. The separated liquid phase first passes through the hydrocracking pretreatment reactor, and then continues to enter the hydrocracking reactor, and passes through the first hydrocracking catalyst bed. The material is divided into two streams; one stream of material is obtained through the gas-liquid separator in the middle of the bed to obtain the liquid phase, and then extracted from the hydrocracking reactor, which enters the hydroisomerization cracking reactor for isomerization cracking reaction; after the liquid phase is drawn out, the The material continues to flow downward through the second hydrocracking catalyst bed; the hydrocracking reaction material and the hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation respectively to obtain naphtha, aviation kerosene, diesel oil and tail oil products. The invention provides for the first time a hydrocracking process for simultaneous production of two or more different specifications of light naphtha, heavy naphtha, jet fuel, diesel oil and tail oil products on a set of hydrogenation process equipment.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a hydrocracking process for flexibly producing high-quality light naphtha, heavy naphtha, jet fuel, diesel oil and tail oil products with different properties by using shale oil as raw material oil. Background technique [0002] Hydrogenation technology is an important processing method for lightening heavy oil and upgrading the quality of light oil. Hydrocracking technology has developed rapidly due to the advantages of strong feed oil adaptability, good product flexibility, high liquid product yield, and high product quality. The existing hydrocracking technology can be divided into three types according to the processing flow: one-stage series hydrocracking process, single-stage hydrocracking process and two-stage hydrocracking process. According to whether the tail oil is recycled or not, it can be divided into three types: one-way one-pass process, partial cycl...

AI Technical Summary

Problems solved by technology

Therefore, when the above hydrocracking processes are used alone, different types of hydrocracking catalysts can only be selected according to needs, or two molecular sieve composite catalysts are used, or two hydrocracking catalysts are used in gradation, or reverse sequence Hydrocracking process technology, but the products of the same fraction range in these processes can usually only produce products of one specification, that is, the operation flexibility is relatively poor

Images