A kind of preparation method of mesophase pitch
A technology based on mesophase pitch and time, which is applied in the field of preparation of new carbon materials, can solve problems such as the difficulty in realizing the industrialization of high-quality mesophase pitch preparation, the combination method, the results obtained during the operation process are not up to expectations, and the separation of low components is difficult. Excellent spinnability, high mesophase content, moderate softening point
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0058] The invention provides a kind of preparation method of mesophase pitch, comprising the following steps:
[0059]Raw material A is subjected to primary polymerization in an inert atmosphere at a temperature of 380°C to 420°C to obtain raw material B; raw material B is subjected to secondary polymerization in an inert atmosphere at a temperature of 380°C to 420°C to obtain raw material C ; The raw material C is aged in an inert atmosphere at a temperature of 320-360° C. to obtain the mesophase pitch; the raw material A is composed of petroleum pitch, ethylene tar pitch or heavy aromatic components of catalytic cracking oil slurry One or more of them are obtained after heat treatment; said S2 includes that when the viscosity of the reaction system of the secondary polymerization reaction is greater than or equal to 0.1 Pa·s, the viscosity of the reaction system of the secondary polymerization reaction is adjusted to be less than 0.1 by adding a viscosity reducer Pa·s steps...
Embodiment 1
[0062] The catalytic cracking oil slurry is subjected to vacuum rectification in a vacuum tower, and the fraction with a boiling point between 238-420° C. is cut to prepare 50 kg of viscosity reducer. After testing, the TI content of the viscosity reducer is 0.005%, the QI content is 0, the C / H value is 9.2, the S content is 0.38%, the N content is 0.36%, the colloid content is 3.5%, and the asphaltene content is 0.2%.
[0063] Take 400kg of petroleum asphalt with a softening point of 100°C after the purification treatment as raw material A, put it into a 500L primary polymerization reactor, and carry out the primary polymerization reaction under nitrogen protection at 400°C for 8 hours to obtain a softening point of 212°C. Raw material B with an AC content of 28%, a TI content of 46%, and a QI content of 10%.
[0064] Take 150kg of raw material B, put it into a 200L secondary polymerization reactor, 3 / (h·kg) and 410°C for secondary polymerization. At the beginning of the s...
Embodiment 2
[0067] The catalytic cracking oil slurry was rectified under vacuum in a vacuum tower, and the fraction with a boiling point of 242-420°C was cut to prepare 50kg of viscosity reducer. After testing, the TI content of the viscosity reducer is 0.008%, the QI content is absent, the C / H value is 9.6, the S content is 0.41%, the N content is 0.42%, the colloid content is 4%, and the asphaltene content is 0.28%.
[0068] Take 400kg of purified petroleum asphalt with a softening point of 100°C as raw material A, put it into a 500L first-stage polymerization reactor, and conduct a first-stage polymerization reaction under nitrogen protection at 410°C for 8 hours to obtain a softening point of 228°C and an AC content of 33 %, TI content 51%, QI content 12% raw material B.
[0069] Take 150kg of raw material B, put it into a 200L secondary polymerization reactor, 3 / (h·kg) and 415°C for secondary polymerization. At the beginning of the secondary polymerization reaction, the viscosity ...
PUM
Property | Measurement | Unit |
---|---|---|
softening point | aaaaa | aaaaa |
softening point | aaaaa | aaaaa |
softening point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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