Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of petroleum-based spinnable mesophase pitch

A mesophase pitch and petroleum technology, which is applied in the field of high-performance pitch-based carbon fiber spinning raw material preparation, can solve the problems of high cost, high requirements for reaction equipment, strong corrosiveness of catalysts, etc.

Active Publication Date: 2021-11-30
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong corrosiveness of the catalyst used in this method, the requirements for the reaction equipment are very high, and it will bring about the problem of operation protection, so that the industrialization of this kind of asphalt has the disadvantages of high cost and high risk.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of petroleum-based spinnable mesophase pitch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Petroleum-based medium-temperature asphalt with the properties shown in Table 1 was used as raw material, and heat-treated in an autoclave at a temperature of 410°C, a pressure of 1 MPa, and a residence time of 5 hours. After the reaction, the reaction product was distilled under reduced pressure at 330° C. and 2000 Pa (absolute pressure) to obtain pitch with a high softening point. The yield and properties of the pitch are shown in Table 2.

[0019] In an autoclave, dissolve one part by weight of high softening point asphalt and three parts by weight tetralin, and carry out hydrogenation treatment at a temperature of 430 ° C, a pressure of 5 MPa, and a time of 120 minutes, and then let it settle for 1 hour to remove After the undesired components, the hydrogenated product was flashed at 400°C under normal pressure to obtain hydrogenated pitch. The yield and properties of the hydrogenated pitch are shown in Table 2.

[0020] The hydrogenated pitch undergoes thermal poly...

Embodiment 2

[0023] The first step is the same as in Example 1.

[0024] In an autoclave, one part by weight of high softening point pitch was dissolved in four parts by weight of tetralin. The reaction conditions were the same as the second step in Example 1. The yield and properties of the hydrogenated pitch obtained are shown in Table 2.

[0025] The conditions of the third step in the implementation case 1 are the same, and the properties and yield of the obtained mesophase pitch are shown in Table 2.

[0026] The obtained mesophase spinning pitch was spun at 348°C with spinning equipment, and carbonized to make carbon fibers. The properties are shown in Table 2.

Embodiment 3

[0028] The first step is the same as in Example 1.

[0029] In an autoclave, one part by weight of high softening point pitch was dissolved in three parts by weight of tetrahydroquinoline. The reaction conditions were the same as the second step in Example 1. The yield and properties of the hydrogenated pitch obtained are shown in Table 2.

[0030] The conditions of the third step in the implementation case 1 are the same, and the properties and yield of the obtained mesophase pitch are shown in Table 2.

[0031] The obtained mesophase spinning pitch was spun at 355°C with spinning equipment, and carbonized to make carbon fibers. The properties are shown in Table 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing spinnable mesophase pitch from petroleum-based asphalt. The preparation process comprises the following steps: the petroleum-based medium-temperature pitch which hardly contains toluene insolubles and quinoline insolubles is subjected to heat treatment and vacuum distillation for supplying In the presence of a hydrogen solvent, hydrogenation treatment is carried out, and finally a heat treatment is carried out to obtain a spinnable mesophase pitch. The mesophase pitch prepared by the invention has relatively low softening point and high mesophase content, and is suitable for preparing high-performance carbon fibers.

Description

technical field [0001] The invention belongs to the technical field of the preparation method of high-performance pitch-based carbon fiber spinning raw materials, and in particular relates to a preparation method of petroleum-based mesophase pitch. Background technique [0002] Pitch-based carbon fibers can be divided into two categories: one is general-purpose grade, which is prepared from isotropic precursor pitch; the other is high-performance grade, which is prepared from anisotropic mesophase pitch. The key to the preparation of high-performance mesophase carbon fibers is the modulation of mesophase pitch. For high-performance carbon fibers prepared from pitch, the spinning pitch must be a mesophase pitch, that is, an optically anisotropic mesophase as determined by a polarizing microscope, and the spinning pitch must have a suitable softening point. If the Mettler method softening point of pitch exceeds 330°C, its spinning temperature will exceed 360°C. The organic s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/155
CPCC10C3/02C10C3/06D01F9/155
Inventor 聂毅李佩佩王伟何成友白璐张香平张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com