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A method for preparing mesophase pitch by hydroisomerization-thermal polycondensation of catalytic cracking oil slurry

A technology for catalytically cracking oil slurry and mesophase pitch, which is applied in the direction of chemically processing tar pitch/petroleum pitch/natural pitch, etc., can solve the problem of high softening point of mesophase pitch, improve reaction activity, shorten reaction time, and improve production efficiency. short cycle effect

Active Publication Date: 2017-08-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of distillate oil above 400 ℃ that obtains through vacuum distillation with FCC oil slurry as raw material, 9,10-dihydroanthracene is the method for preparing mesophase pitch as a hydrogenation isomerization catalyst, to solve the following problems The problem of high softening point of mesophase pitch prepared from petroleum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 300g of vacuum distillate of naphthenic crude oil or intermediate base crude oil catalytic cracking oil slurry and 6g of 9,10-dihydroanthracene into a stainless steel high-pressure reaction kettle; pass nitrogen gas to purge the air in the replacement kettle, and the nitrogen flow rate is 3L / min, the temperature rises to 100°C to start stirring, the reaction temperature is 290°C, the reaction pressure is 5MPa, and the temperature is kept constant for 6h; then, the temperature is raised to 390°C, the reaction pressure is increased to 12MPa, the reaction is continued for 8h, the pressure is released, and the temperature is slowly lowered to obtain The softening point of the mesophase pitch is 235°C, the H / C ratio is 0.57, the mesophase content is 98%, and it has a wide-area streamlined optical structure and good spinnability.

[0021] The optical structure and mesophase content of mesophase pitch are observed by polarizing microscope; the softening point is measured b...

Embodiment 2

[0023] Add 300g of vacuum distillate of naphthenic crude oil or intermediate base crude oil catalytic cracking oil slurry and 15g of 9,10-dihydroanthracene into a stainless steel high-pressure reaction kettle; pass nitrogen gas to purge the air in the replacement kettle, and the nitrogen flow rate is 3L / min, the temperature rises to 100°C to start stirring, the reaction temperature is 300°C, the reaction pressure is 5MPa, and the temperature is kept constant for 6h; then, the temperature is raised to 400°C, the reaction pressure is increased to 12MPa, the reaction is continued for 8h, the pressure is released, and the temperature is slowly lowered to obtain The softening point of the mesophase pitch is 246°C, the H / C ratio is 0.65, the mesophase content is 100%, and it has a wide-area streamlined optical structure and good spinnability.

Embodiment 3

[0025] Add 300g of vacuum distillate of naphthenic crude oil or intermediate base crude oil catalytic cracking oil slurry and 24g of 9,10-dihydroanthracene into a stainless steel high-pressure reaction kettle; pass nitrogen gas to purge the air in the replacement kettle, and the nitrogen flow rate is 3L / min, the temperature rises to 100°C to start stirring, the reaction temperature is 290°C, the reaction pressure is 5MPa, and the temperature is kept constant for 8h; then, the temperature is raised to 380°C, the reaction pressure is increased to 12MPa, the reaction is continued for 10h, the pressure is released, and the temperature is slowly lowered to obtain The softening point of the mesophase pitch is 238°C, the H / C ratio is 0.61, the mesophase content is 100%, and it has a wide-area streamlined optical structure and good spinnability.

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Abstract

The invention provides a method for preparing mesophase pitch by hydroisomerization-thermal polycondensation of catalytic cracking oil slurry. This method is to use the FCC oil slurry of naphthenic crude oil or intermediate base crude oil, and then distillate > 400 °C distillate obtained by vacuum distillation as raw material, in the presence of a hydroisomerization catalyst, firstly, at 250 ~ 320 ° C, Under the pressure of 5MPa, react for 4‑8h to obtain the modified raw material. After modification, the raw materials are reacted at a reaction temperature of 330-460° C. and a reaction pressure of 12 MPa for 2-10 hours to obtain high-quality mesophase pitch. The invention has simple preparation process, low production cost, high mesophase content (>97%), low softening point (230-250°C), and large wide-area streamlined optical anisotropy structure, which can Spinning performance is good.

Description

technical field [0001] The invention relates to a method for preparing mesophase pitch by hydroisomerization-thermal polycondensation of catalytic cracking oil slurry, which belongs to the field of petroleum processing and the field of carbon fiber precursor research. Background technique [0002] Mesophase pitch is a mixture of a variety of flat disk-shaped fused-ring aromatic hydrocarbons with a relative molecular mass of 370-2000. It is a nematic liquid crystal substance generated from a mixture of heavy aromatic hydrocarbons, also known as liquid crystal phase pitch. The mesophase belongs to nematic liquid crystal, which has various properties of crystals and liquids, such as physical properties of crystals such as heat, light, electricity, and magnetism of crystals, as well as physical properties of liquids such as rheology, viscosity, and deformation. Many high-performance carbon materials can be prepared from mesophase pitch: such as ultra-high modulus pitch-based car...

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牛建萍刘静商晓敏常光凯叶家顺何笑雨马文茜李志恒于洋马倩倩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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