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A method for preparing mesophase pitch using catalytic cracking oil slurry

A technology of catalytic cracking oil slurry and mesophase pitch, which is applied in the field of petroleum pitch, can solve the problems of waste of resources, no economic benefits, and limited use range, etc., to reduce waste, realize large-scale industrial production, and have a low softening point Effect

Active Publication Date: 2022-06-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the petrochemical industry, catalytic cracking oil slurry is an important low-value-added by-product, which is mainly used as a blending component of fuel oil or directly as heavy fuel oil, which limits its application range and does not bring High economic benefits, resulting in a certain waste of resources

Method used

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  • A method for preparing mesophase pitch using catalytic cracking oil slurry
  • A method for preparing mesophase pitch using catalytic cracking oil slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the first step, 0.01g of a 30nm-sized few-layer reduced graphene oxide combination (with an oxygen content of 1%) and 400g of catalytically cracked oil slurry were added to the high-temperature and high-pressure reactor, and the nitrogen was purged to replace the air and then sealed. The temperature was raised to 150 °C at a rate of 5 °C / min and vigorously stirred (500 rpm) for 1 h to make the graphene evenly dispersed in the oil slurry. Then it was raised to 430°C at a rate of 2°C / min, stirred (300 rpm) and kept for 3 h, and the pressure during the reaction was self-boosting. When the heat preservation process is over, release the pressure in the kettle, purge with nitrogen for 30 minutes to remove light components, stop the stirring device, and cool the reaction kettle to room temperature to obtain 300 g of petroleum asphalt, the softening point of which is 120 ° C, the molecular weight distribution is 1.72, and the crystal layer is The pitch is 0.3483nm.

[0031]...

Embodiment 2

[0034] The amount of reduced graphene oxide added was increased from 0.01g to 0.04g, and other conditions were the same as in Example 1. The obtained petroleum pitch had a softening point of 135 ° C, a molecular weight distribution of 1.70, and a crystal layer spacing of 0.3481 nm. The final prepared mesophase The softening point of the asphalt is 265°C, and the mesophase content is 95%. The thermal conductivity of the carbon foam prepared by using the mesophase pitch is 106 W / (m·K); the modulus of the carbon fiber is 510 GPa, and the thermal conductivity is 983 W / (m·K).

Embodiment 3

[0036]The amount of reduced graphene oxide added was increased from 0.01g to 0.08g, and other conditions were the same as in Example 1. The obtained petroleum pitch had a softening point of 142 ° C, a molecular weight distribution of 1.66, and a crystal layer spacing of 0.3479 nm. The final prepared mesophase The softening point of the asphalt is 261°C, and the mesophase content is 97%. The thermal conductivity of the carbon foam prepared by using the mesophase pitch is 115 W / (m·K); the modulus of the carbon fiber is 550 GPa, and the thermal conductivity is 1008 W / (m·K).

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Abstract

The invention discloses a method for preparing mesophase pitch by using catalytic cracking oil slurry, which belongs to the field of petroleum pitch. The method uses catalytic cracking oil slurry as a low value-added by-product as a raw material, and graphene as an additive. The first step is to prepare petroleum pitch with a high softening point, narrow molecular weight distribution, and high regularity. high performance mesophase pitch. The present invention uses catalytic cracking oil slurry as a raw material, develops a new method for preparing high-performance mesophase pitch, increases its economic added value, and the preparation process of the present invention is simple, and the softening point of the finally obtained mesophase pitch is low. High mesophase content.

Description

technical field [0001] The invention relates to a method for preparing mesophase pitch, which uses catalytic cracking oil slurry as raw material to prepare mesophase pitch by a two-step method, and belongs to the field of petroleum pitch. Background technique [0002] Catalytic cracking oil slurry refers to the waste oil slurry rich in aromatic hydrocarbons discharged from the crude oil after passing through the catalytic cracking unit in the refining process. It is the main by-product of the catalytic cracking process. one of the refining processes. The by-product oil slurry produced by catalytic cracking units in my country can reach more than 10 million tons every year. In the petrochemical industry, catalytic cracking slurry is an important low value-added by-product, which is mainly used as a blending component of fuel oil or directly used as heavy fuel oil, which limits its scope of use and does not bring Higher economic benefits, resulting in a certain waste of reso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00C10C3/02
CPCC10G50/00C10C3/02
Inventor 马兆昆刘昱宏蒋兴家房廷浩张型伟
Owner BEIJING UNIV OF CHEM TECH
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