Raw material pitch for a new carbon-based material and its production process

A production process and new material technology, applied in building thermal insulation materials, chemical processing of tar pitch/petroleum pitch/natural pitch, petroleum industry, etc. The effect of excellent aggregate structure, variety and narrow molecular weight distribution

Active Publication Date: 2021-09-07
鞍钢化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the existing problems of complex process, high equipment requirements, high cost and difficult industrialization process in the existing method for preparing mesophase pitch.

Method used

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  • Raw material pitch for a new carbon-based material and its production process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as figure 1 As shown, in the present embodiment, the raw material low-temperature coal tar that is stored in the raw oil storage tank 1 and whose quinoline insoluble matter content is 1.53wt% is sent into No. 1 vacuum distillation tower 3 through No. 1 heating furnace 2, The temperature at the top of the tower is controlled at 240°C, the temperature at the bottom of the tower is controlled at 350°C, and the vacuum degree is controlled at 0.08MPa. The gas phase line at the top of the tower gets by-product light oil and sends it to light oil storage tank 5; the remaining product at the bottom of the tower is sent to heavy oil storage tank 4. The heavy oil in the heavy oil storage tank 4 is sent to the polymerization reactor 6 for asphalting reaction. First, high-purity nitrogen is used to replace the air in the polymerization reactor 6 so that the initial pressure is 0.05 MPa, and the pressure is self-boosted; Raise the temperature from normal temperature to 360°C at...

Embodiment 2

[0085] The raw material medium-temperature coal tar with quinoline insoluble matter content of 2.78% is sent to No. 1 vacuum distillation tower through No. 1 heating furnace. The temperature at the top of the tower is controlled at 238 ° C, the temperature at the bottom of the tower is controlled at 340 ° C, and the vacuum degree is controlled at 0.08 MPa, the gas phase line at the top of the tower obtains light oil as a by-product, and the remaining product at the bottom of the tower is sent to the polymerization reactor for asphaltization reaction. First, high-purity nitrogen is used to replace the air in the polymerization reactor so that the initial pressure is 0.1MPa, and the pressure is self-boosted, and then the temperature is raised from normal temperature to 360°C at a rate of 2°C / min, and the constant temperature is kept for 7 hours. The final pressure in the kettle is maintained At 0.85MPa, the polymerized asphalt is prepared, the softening point of the polymerized a...

Embodiment 3

[0093] The raw material high-temperature coal tar with quinoline insoluble matter content of 3.98% is sent to No. 1 vacuum distillation tower through No. 1 heating furnace. MPa, the gas phase line at the top of the tower obtains light oil as a by-product, and the remaining product at the bottom of the tower is sent to the polymerization reactor for asphaltization reaction. First, high-purity nitrogen is used to replace the air in the polymerization reactor so that the initial pressure is 0.4MPa, and the pressure is self-boosted, and then the temperature is raised from normal temperature to 340°C at a rate of 5°C / min, and the constant temperature stays for 6 hours. The final pressure in the kettle remains At 1.0MPa, polymerized asphalt is prepared, the softening point of polymerized asphalt is 46°C, and the density is 1.12g / cm 3 .

[0094] Cool the polymerized asphalt to about 200°C, and send it to the No. 1 mixing tank with the mass ratio of 4:1 with the washing oil. The mixi...

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Abstract

The invention relates to a kind of raw material asphalt for carbon-based new materials and its production process. The remaining product after the light oil is removed from the raw material oil through a vacuum distillation tower is sent to a polymerization reactor, and after pressurized asphalting reaction, a polymerization Asphalt; polymerized asphalt and the first solvent are separated by settling to obtain aromatic-rich light oil and aromatic-rich heavy oil; aromatic-rich heavy oil is mixed and separated with the first solvent to obtain soluble components and insoluble components; aromatic-rich light oil Distillation with soluble components under reduced pressure to obtain light refined asphalt; hydrogenation reaction between light refined asphalt and hydrogen-donating reagent to obtain hydrogenated asphalt, and further refined hydrogenated asphalt; insoluble components and first solvent, second solvent Mix and separate to obtain filtrate and filter residue; the filtrate is distilled under reduced pressure to obtain heavy refined asphalt. The invention is used for preparing a high-quality asphalt raw material with narrow molecular weight distribution, moderate molecular weight, highly ordered molecular arrangement, good fluidity, excellent aggregate structure and stable thermal reaction activity.

Description

technical field [0001] The invention relates to the technical field of high-efficiency utilization of coal tar pitch, in particular to a raw material pitch for carbon-based new materials and a production process thereof. Background technique [0002] Heavy aromatic hydrocarbons (such as coal tar pitch, petroleum pitch and various heavy oils, etc.) are bulk products separated from coal tar processing and petroleum processing. Material development and preparation are crucial. Heavy aromatic hydrocarbons are complex mixtures of condensed aromatic hydrocarbons, featuring high molecular weight, high aromaticity, high condensation degree, high carbon content, relatively low heteroatom and metal content, etc., and are a preparation functional type High-quality precursors for carbon-based new materials. [0003] The properties of starting materials and preparation conditions are important factors affecting the structure and performance of the final product. The chemical compositio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
CPCC10C3/02C10G57/00
Inventor 刘海丰何莹张大奎穆春丰
Owner 鞍钢化学科技有限公司
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