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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

Active Publication Date: 2010-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when processing coker wax oil, the pressure drop of the reactor will still rise rapidly, and the long-term operation of the device will be seriously affected

Method used

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  • Method for hydrocracking of coked wax oil
  • Method for hydrocracking of coked wax oil
  • Method for hydrocracking of coked wax oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The feedstock oil is a mixture of 50% by weight of coker gas oil and 50% by weight of vacuum gas oil. The properties of the feedstock oil are shown in Table 1.

[0037] The catalyst used is that the hydrogenation protection catalyst loaded in the hydrogenation protection reactor is RG-1 catalyst, and the amount of loading is 33.3ml; the hydrofinishing catalyst loaded in the hydrofinishing reactor is RN-32 catalyst, and the loaded The amount is 200ml; the hydrocracking catalyst loaded in the hydrocracking reactor is RHC-1 catalyst, and the loaded amount is 100ml. The above-mentioned catalysts are all produced by Changling Catalyst Factory of Sinopec Catalyst Company.

[0038] The specific process is as follows:

[0039] Such as figure 1 As shown, the feedstock oil from pipeline 23 is mixed with the new hydrogen from pipeline 17 passing through the new hydrogen compressor 1, and after heat exchange in the heat exchanger 19, it is mixed with the circulating hydrogen from...

Embodiment 2

[0053] The feedstock oil is a mixture of 70% by weight of coker gas oil and 30% by weight of vacuum gas oil. The properties of the feedstock oil are shown in Table 5.

[0054] The adopted hydrogenation protection reactor, hydrofinishing reactor and hydrocracking reactor are the same as those in Example 1.

[0055] The catalyst used is that the hydrogenation protection catalyst loaded in the hydrogenation protection reactor is RG-1 catalyst, and the amount of loading is 26.7ml; the hydrofinishing catalyst loaded in the hydrofinishing reactor is RN-32 catalyst, and the loaded The amount is 200ml; the hydrocracking catalyst loaded in the hydrocracking reactor is RHC-1M catalyst, and the loaded amount is 80ml. The above-mentioned catalysts are all produced by Changling Catalyst Factory of Sinopec Catalyst Company.

[0056] The same process as in Example 1 was used to operate, except that the reaction conditions in each reactor were shown in Table 6, and the properties of the effl...

Embodiment 3

[0067]According to the raw material described in embodiment 1, catalyzer, process flow and reaction condition operate, difference is, what hydrogenation protection reactor adopted is fixed-bed reactor, and feeding mode is upper feeding, and the effluent of this reactor is from outflow from the bottom of the reactor.

[0068] After 5000 hours of continuous operation of the flow process, the pressure drop of the reactor bed rises, and subsequent operations cannot be performed. The properties of the final product at this time are shown in Table 9.

[0069] Compared with Example 1, the upper feeding mode of the hydrogenation protection reaction in Example 3 still makes the operation period of the whole device shorter.

[0070] Table 9

[0071]

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/00
Inventor 董建伟胡志海蒋东红赵阳吴昊毛以朝聂红
Owner CHINA PETROLEUM & CHEM CORP
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