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A method for preparing mesophase pitch by hydrogenation reduction-co-carbonization of catalytic cracking oil slurry

A technology of mesophase pitch and co-carbonization, which is used in the chemical processing of tar pitch/petroleum pitch/natural pitch, etc., can solve the problems of high softening point, low purity of mesophase pitch, and low content of mesophase, and achieve the softening point Low, reduced condensation reaction rate, high mesophase content

Active Publication Date: 2017-07-07
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 method for preparing petroleum-based mesophase pitch with uniform and high mesophase content. In the method, the FCC oil slurry of naphthenic or intermediate-based crude oil is used as a raw material, and under the action of a catalyst, the halogenated alkanes are mixed with the raw materials, and the temperature is raised. to 280-350° C., under a pressure of 0-2 MPa, and react for 5-20 hours to obtain modified oil. Take the distillate oil of the modified oil above 400°C, mix the distillate oil with the co-carbonizing agent, and react for 2-10 hours at 360-480°C, with a reaction pressure of 4-10 MPa, to obtain high-quality mesophase pitch. The technological process of the invention is simple and easy to operate, and the prepared mesophase pitch has uniform anisotropic structure, high mesophase content (>96%), low softening point (240-260 DEG C), and good spinnability.

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 Patents(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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