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Method for preparing mesophase asphalt by using catalytic cracking slurry oil

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

Active Publication Date: 2021-10-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for preparing mesophase asphalt by using catalytic cracking slurry oil
  • Method for preparing mesophase asphalt by using catalytic cracking slurry oil

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In the first step, 0.01g of 30nm few-layer reduced graphene oxide combination (with an oxygen content of 1%) and 400g of catalytic cracking oil slurry are added to a high-temperature and high-pressure reactor, and nitrogen is purged to replace air and then sealed to Raise the temperature to 150°C at a rate of 5°C / min and vigorously stir (500rpm) for 1h to disperse the graphene evenly 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 hours, and the pressure was self-increasing during the reaction. When the heat preservation process is over, the pressure in the kettle is released, nitrogen is purged for 30 minutes to remove light components, the stirring device is stopped, and the reactor is cooled to room temperature to obtain 300 g of petroleum pitch, which has a softening point of 120 ° C, a molecular weight distribution of 1.72, and a crystal layer. The pitch is 0.3483nm.

[0031] The second step is to crush the...

Embodiment 2

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

Embodiment 3

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

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Abstract

The invention discloses a method for preparing mesophase asphalt by using catalytic cracking slurry oil, and belongs to the field of petroleum pitch. According to the method, a low-added-value byproduct, namely catalytic cracking slurry oil, is taken as a raw material, graphene is taken as an additive, the petroleum asphalt with a high softening point, narrow molecular weight distribution and high regularity is prepared in the first step, and the high-performance mesophase asphalt is prepared through direct thermal polycondensation in the second step. According to the method, the catalytic cracking oil slurry is adopted as the raw material, a novel method for preparing the high-performance mesophase asphalt is developed, the economic added value of the high-performance mesophase asphalt is increased, the preparation process is simple in technology, and the finally obtained mesophase asphalt is low in softening point and high in mesophase content.

Description

technical field [0001] The invention relates to a method for preparing mesophase pitch, which uses catalytic cracking oil slurry as a raw material to prepare mesophase pitch through a two-step method, and belongs to the field of petroleum asphalt. Background technique [0002] Catalytic cracking oil slurry refers to the waste oil slurry rich in aromatics discharged from the crude oil refining process after passing through the catalytic cracking unit. It is the main by-product of the catalytic cracking process, and the catalytic cracking process is the main One of the refining process. 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 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 Higher economic benefit...

Claims

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Application Information

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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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