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Catalytic cracking method for increasing liquid yield

A catalytic cracking and catalytic cracking device technology, which is applied in the field of catalytic cracking to increase liquid yield, can solve problems such as poor thermal stability, and achieve significant economic benefits

Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such dispersants can achieve the effect of reducing coke, they have poor thermal stability, and cracking reactions will occur in the catalytic cracking process to generate sulfur nitrogen compounds that pollute the environment, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0028] One embodiment, the oxidation synthesis method is used to carry out the oxidation treatment; the conditions of the oxidation synthesis method include: the oxidant is hydrogen peroxide, the oxidation synthesis catalyst is ferric oxide, and the weight ratio of hydrogen peroxide to distillate oil is 1: (1- 150), preferably 1:(2-100); the weight ratio of oxidation synthesis catalyst to distillate oil is 1:(1-15), preferably 1:(2-10), and the reaction temperature is 40-55°C, preferably 50-55°C, and the reaction time is 1-10 hours, preferably 5-10 hours.

[0029] According to the present invention, in step d, the hydroxylated oil and the hydrocarbon oil feedstock can be mixed in conventional mixing conditions and equipment in the art, such as feedstock oil mixing tanks or static mixers, etc., preferably the obtained hydroxylated oil and hydrocarbon oil The raw materials are mixed in a static mixer. Static mixer is a kind of high-efficiency mixing equipment without moving par...

Embodiment 1

[0042] This example is used to illustrate the catalytic cracking method for increasing the liquid yield provided by the present invention.

[0043] According to the ratio of m (atmospheric residual oil): m (hydroxylated oil A) of 4:1, the two are fully mixed in a static mixer to obtain a mixed raw oil at 200 ° C, and then the mixed raw oil is injected into the fluidized bed for reaction The catalytic cracking reaction is carried out in the reactor, wherein the reaction temperature is 510°C, and the weight hourly space velocity is 20h -1 , the mass ratio of agent to oil is 6. The resulting product distribution is shown in Table 4.

Embodiment 2

[0045] This example is used to illustrate the catalytic cracking method for increasing the liquid yield provided by the present invention.

[0046] The reaction device adopted is the same as in Example 1, and the atmospheric residue and main experimental steps used are the same as in Example 1. The difference is that the atmospheric residue is mixed with hydroxylated oil B, and m (atmospheric residue): m (hydroxylated oil B) was 20:3, and the main results are listed in Table 4.

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PUM

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Abstract

The invention relates to a catalytic cracking method for increasing the liquid yield. The catalytic cracking method for increasing the liquid yield comprises the steps that hydrocarbon oil feedstock fed into a catalytic cracking unit is in contact with a catalytic cracking catalyst, and a catalytic cracking reaction is performed to obtain a reaction product and a spent catalyst; the obtained reaction product is separated to at least obtain a distillate with a distillation range of 190-360 DEG C; at least a part of the distillate is sent to a hydroxylation unit for oxidation treatment to obtainhydroxylated oil; and the obtained hydroxylated oil is mixed with the hydrocarbon oil feedstock, and mixed feedstock oil is obtained; and the mixed feedstock oil is sent to the catalytic cracking unit to be in contact with the catalytic cracking catalyst for the catalytic cracking reaction. The catalytic cracking method can reduce coke output and increase the liquid yield.

Description

technical field [0001] The present disclosure relates to a catalytic cracking process with increased liquid yield. Background technique [0002] With the continuous deepening of oil resource exploitation, the proportion of heavy and low-quality crude oil in the process of oil refining and oil processing is increasing. Heaviness and inferiority are mainly reflected in the increase of colloid and asphaltene content in raw oil, and according to the definition of additional coke in coke, it is mainly composed of colloid, asphaltene and other high-boiling point and polycyclic aromatic hydrocarbons in raw oil The coke precursors are formed by condensation reaction on the catalyst surface. Therefore, the worse the quality of raw oil, the greater the impact on coke. [0003] At present, the following three measures are taken to solve the problem of inferior raw materials: one is to improve the original equipment by introducing auxiliary equipment to improve the quality of raw oil;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00
CPCC10G57/00
Inventor 杨超朱根权谢朝钢
Owner CHINA PETROLEUM & CHEM CORP