Method for processing inferior crude oil through combined processes

Abstract

The invention relates to a method for processing inferior crude oil through combined processes, which comprises the following steps of: carrying out solvent deasphalting to an inferior crude heavy oil to obtain deasphalted oil; preheating the deasphalted oil, entering a first reaction zone of a catalytic conversion reactor, mixing either oil gas produced by the reaction or a spent catalyst with alightweight crude oil, entering a second reaction zone for a cracking reaction, a hydrogen transfer reaction and an isomerization reaction, separating solids and liquids, further separating the reaction products into dry gas, liquefied gas, gasoline, diesel and catalytic wax oil, and cycling the spent catalyst through steam stripping and regeneration, wherein the reaction conditions of the first reaction zone and the second reaction zone are sufficient to obtain the catalytic wax oil product occupying 12-60 wt% of the crude oil through the reactions; hydrogenating the catalytic wax oil to obtain hydrogenated catalytic wax oil, and introducing to the catalytic conversion reactor to further react to obtain a lightweight fuel oil product. The method provided by the invention can be used for furthest producing propylene and lightweight fuel oil especially high-octane petrol from inferior crude oil, and thus, the efficient utilization of oil resources is realized.

Description

technical field [0001] The invention belongs to the catalytic conversion method of hydrocarbon oil, more specifically, it combines extraction process, catalytic cracking process and hydrogenation process to process low-quality raw material oil and convert it into a large amount of light fuel oil. Background technique [0002] The quality of crude oil is getting worse with the continuous increase of crude oil extraction, mainly manifested in the increase of crude oil density, viscosity, heavy metal content, sulfur content, nitrogen content, colloid and asphaltene content and acid value. At present, the price difference between low-quality crude oil and high-quality crude oil is also increasing with the shortage of oil resources, resulting in more and more attention to low-priced low-quality crude oil extraction and processing methods, that is, to increase as much as possible from low-quality crude oil. The yield of light oil has brought huge challenges to traditional crude oi...

AI Technical Summary

Problems solved by technology

This method organically combines the catalytic cracking process, extraction process and hydrogenation process, and has a certain effect on heavy oil treatment, but the process is complicated and the liquid yield is low

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