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Method for preparing mesophase pitch through catalytic cracking oil slurry hydrogenation reduction and co-carbonization

A mesophase pitch and co-carbonization technology, which is applied to the processing of tar pitch/petroleum pitch/natural asphalt by chemical methods, can solve the problems of high softening point, low purity of mesophase pitch, and low content of mesophase, and reach the softening point Low, reduced condensation reaction rate, high mesophase content effect

Active Publication Date: 2016-01-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method of using FCC oil slurry and polypropylene alcohol as raw materials to prepare mesophase pitch through a co-carbonization process, so as to solve the problem of low purity, low content of mesophase, and softening of mesophase pitch prepared from petroleum. high point problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 250g of catalytic cracking oil slurry of naphthenic crude oil, 10g of bromoethane and 5g of aluminum chloride into a stainless steel autoclave; purge with nitrogen, the flow rate is 3L / min, start stirring, and the reaction temperature is 300°C. The reaction pressure is 1MPa, and the temperature is maintained for 12 hours to obtain modified oil; the modified oil is distilled under reduced pressure to obtain distillate oil above 400°C, mix 250g of distillate oil with 25g of polypropylene alcohol, and add it to a stainless steel high-pressure reactor; Purge, the flow rate is 3L / min, start stirring, the reaction temperature is 440°C, the reaction pressure is 6MPa, the reaction is continued for 6 hours, the pressure is released, and the temperature is slowly lowered to obtain a mesophase pitch with a softening point of 249°C and a H / C ratio of 0.61 , the mesophase content is 100%, and it is a wide-area streamlined optical structure.

[0021] The optical structure and mes...

Embodiment 2

[0023] Put 250g of catalytic cracking oil slurry of naphthenic crude oil, 10g of bromoethane and 5g of aluminum chloride into a stainless steel autoclave; purge with nitrogen, the flow rate is 3L / min, start stirring, and the reaction temperature is 300°C. The reaction pressure is 1MPa, and the temperature is maintained for 12 hours to obtain modified oil; the modified oil is distilled under reduced pressure to obtain distillate oil above 400°C, mix 250g of distillate oil with 37.5g of polypropylene alcohol, and add it to a stainless steel high-pressure reactor; Nitrogen purging, the flow rate is 3L / min, stirring is started, the reaction temperature is 450°C, the reaction pressure is 8MPa, the reaction is continued for 6 hours, the pressure is released, and the temperature is slowly lowered to obtain a mesophase pitch with a softening point of 257°C and a H / C ratio of 0.59, the mesophase content is 98%, and it is a wide-area streamlined optical structure.

Embodiment 3

[0025] Put 250g of naphthenic crude oil catalytic cracking oil slurry, 15g of bromoethane and 7.5g of aluminum chloride into the stainless steel high-pressure reaction kettle; pass in nitrogen for purging, the flow rate is 3L / min, start stirring, and the reaction temperature is 320°C , the reaction pressure is 2MPa, and the temperature is constant for 8 hours to obtain modified oil; the modified oil is distilled under reduced pressure to obtain distillate oil above 400°C, mix 250g distillate oil with 50g polypropylene alcohol, and add it to a stainless steel high-pressure reactor; Nitrogen purging, the flow rate is 3L / min, stirring is started, the reaction temperature is 430°C, the reaction pressure is 12MPa, the reaction is continued for 4 hours, the pressure is released, and the temperature is slowly lowered to obtain a mesophase pitch with a softening point of 261°C and a H / C ratio of 0.57, the mesophase content is 96%, and it is a wide-area streamlined optical structure.

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Abstract

The invention provides a preparation method of petroleum base mesophase pitch with even high mesophase content. The FCC oil slurry of naphthenic crude oil or intermediate base crude oil serves as the raw material, under the action of a catalyst, haloalkane is mixed with the raw material, the temperature is increased to range from 280 DEG C to 350 DEG C, the pressure ranges from 0 MPa to 2 MPa, reaction is conducted for 5-20 h, and modified oil is obtained. Distillate oil, obtained at the temperature higher than 400 DEG C, of the modified oil is taken, the distillate oil is mixed with a co-carbonization agent, the temperature ranges from 360 DEG C to 480 DEG C, the reaction pressure ranges from 4 MPa to 10 MPa, reaction is conducted for 2-10 h, and the high-quality mesophase pitch is obtained. According to the preparation method of the petroleum base mesophase pitch with the even high mesophase content, preparation technology is simple and easy to operate, the anisotropic structure of the prepared mesophase pitch is uniform, the mesophase content is high and larger than 96 percent, the softening point is low, the temperature ranges from 240 DEG C to 260 DGE C, and the spinnability is good.

Description

technical field [0001] The invention relates to a method for preparing uniform high-content petroleum-based mesophase pitch. Background technique [0002] Mesophase pitch is a pitch-like substance with mesophase characteristics. Mesophase pitch with excellent performance is obtained through careful pretreatment. It is a suitable raw material with high aromatic content and can be further carbonized to form high-performance carbon materials with different functions. The selection and pretreatment of raw materials are the key to the preparation of high-quality mesophase pitch. Petroleum fractions with high aromaticity and their processing by-products have the potential to be used as high-performance petroleum-based carbon materials, such as low asphaltene content, low heteroatoms and [0003] , the characteristics of metal content, through a suitable pretreatment process, can form a petroleum-based mesophase pitch with excellent performance, and then can be processed into a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02
Inventor 刘东杨远兮李明杜辉李庆银张亚东李敏于冉陈清泰于洋李志恒马倩倩陈艳峰陈朋陈鹏丁若男宋贤妮王浩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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