Two-way combined process of wax-oil hydrogenation treatment and catalytic cracking

Abstract

A two-way combined process of wax oil hydro-process and catalytic crack is carried out by entering wax oil, catalytic cracking re-circulating oil and catalytic cracking diesel oil into hydro-processor, hydrogenation reacting under existence of hydrogen and hydrogenation catalyst, separating for reactant to obtain gas, hydrogenation naphtha oil, hydrogenation diesel oil and hydrogenation tail oil, entering hydrogenation tail oil into catalytic cracker, crack reacting under existence of catalytic cracking agent, separating to obtain dry gas, liquefied gas, catalytic cracking gasoline, catalytic cracking diesel oil and catalytic cracking re-circulating oil and oil slurry, and circulating for catalytic cracking diesel oil and catalytic cracking re-circulating oil to hydro-processor. It has higher recovery rate and cetyl value, less sulfur content, arene content and coke output.

Description

technical field

[0001] The invention belongs to a combined process for treating hydrocarbon oil with a hydrotreating process and another conversion step, more specifically, a method for organically combining the two processes of wax oil hydrotreating and catalytic cracking. Background technique

[0002] At present, the world is facing the trend of crude oil becoming heavier and worse, while people's demand for heavy fuel oil is gradually decreasing, while the demand for light oil is greatly increasing. Therefore, how to use limited oil resources to produce light products in a large amount, the light weight of heavy oil is one of the key technologies. The main processes for lightening heavy oil include hydrocracking, catalytic cracking and coking. Among them, the application of hydrocracking is limited due to factors such as high investment, high operating costs and difficulty in processing vacuum residue; coking process is limited due to low liquid yield. , poor product qua...

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