Method for hydrocracking of coked wax oil

A technology of hydrocracking and coking wax oil, which is applied in the fields of hydrocarbon oil cracking and petroleum industry, etc. It can solve the problems of rapid increase in reactor pressure drop and the influence of long-term operation of the device, so as to prevent the increase of bed pressure drop and facilitate the process of processing Hydrocracking activity and the effect of extending the operating cycle
CN101760233AActive Publication Date: 2010-06-30CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2010-06-30

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Abstract

The invention provides a method for hydrocracking of coked wax oil, which comprises: contact reaction of raw materials, hydrogen and a hydrogenation protection catalyst under the condition for hydrogenation protection reaction, wherein oil in the raw materials is coked wax oil or mixed oil containing coked wax oil; contact reaction of products in the hydrogenation protection reaction, products ofhydrocracking reaction and a hydrogenation refining catalyst under the condition for hydrogenation refining reaction; separation of light distillates, intermediate distillates and heavy distillates with initial boiling points being 350-360 DEG C from products of the hydrogenation refining reaction; and contact reaction of the heavy distillates with the initial boiling points being 350-360 DEG C and a hydrocracking catalyst under the condition for hydrocracking reaction, thereby obtaining products of the hydrocracking reaction. The method of the invention prolongs the operating cycle of the device, the consumption of the hydrocracking catalyst is low, and the yield of the intermediate distillates in the products is high.
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Description

technical field

[0001] The invention relates to a method for hydrocracking coker gas oil. Background technique

[0002] Delayed coking is one of the important secondary processing methods in refineries. Coker gas oil (CGO) is the wax oil fraction obtained in the delayed coking process, generally accounting for 20-30% by weight of coking products. Compared with straight-run gas oil fractions, coker gas oil has the characteristics of high nitrogen content, high colloid content, high content of polycyclic aromatic hydrocarbons, and many solid particles (such as coke powder), etc. It is a low-quality and difficult-to-process fraction.

[0003] The coking wax oil can be processed by mixing the coker wax oil into the feed of the catalytic cracking unit for catalytic cracking, and using the coker wax oil as the raw material of the hydrocracking unit for hydrocracking.

[0004] Due to the characteristics of coker gas oil, mixing it into the raw material of catalytic cracking unit f...

Claims

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