Catalytic conversion method for processing high-nitrogen raw material

Abstract

A catalytic conversion method for processing a high-nitrogen raw material is characterized in that a regenerated catalyst having a lower temperature enters the pre-lift section of a reactor, upward flows under the action of a pre-lift medium, enters a first reaction zone, contacts with the high-nitrogen raw material, adsorbs and reacts at the lower portion of the first reaction zone, and upward flows; the formed oil agent mixture enters a second reaction zone, contacts with a regenerated catalyst having a higher temperature in the second reaction zone, and continuously and fully reacts; and the oil agent mixture from the second reaction zone goes through the outlet of the reactor and undergoes gas-liquid separation, the carbon-containing catalyst obtained after the separation is stripped, scorched and regenerated for cycle use, and the separated reaction oil gas is sent to a subsequent product separating system. The method can be used to directly process the high-nitrogen raw material, and improves the conversion rate of the high-nitrogen raw material. The method is simple to operate, and a routine catalytic cracking device can be simply reconstructed to carry out the operation of the method. Gasoline produced through the method has a low olefin content.

Description

technical field [0001] The invention belongs to the catalytic cracking method of hydrocarbon oil in the absence of hydrogen, more specifically, belongs to a catalytic cracking method of processing high-nitrogen hydrocarbon oil feedstock in the absence of hydrogen. Background technique [0002] Catalytic cracking is an important heavy oil lightening process in the oil refining industry. It is a process of catalytically converting heavy hydrocarbons with high boiling points into high-value products such as gasoline by using acidic catalysts and high reaction temperatures. In recent years, with the lack of crude oil worldwide and its increasing weight, the yield of light oil in the primary processing process of the oil refining industry has declined, and the raw materials for catalytic cracking units have also become increasingly scarce. Therefore, it is necessary to gradually increase the proportion of blending vacuum residue, coker wax oil and deasphalted oil in the catalytic...

AI Technical Summary

Problems solved by technology

Thus ultimately reducing the conversion rate of raw materials, reducing the yield of gasoline, increasing the yield of dry gas and coke, resulting in a decrease in the selectivity of the catalytic process

[0003] Various methods have been used to try to process high-nitrogen raw materials, such as hydrogenation treatment, oxidation treatment, acid treatment, etc., but the problems with these methods are that the equipment investment and operating costs are high, and may cause equipment corrosion and environmental pollution

The disadvantage of this method is that only high-nitrogen raw materials can be blended

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