A kind of preparation method of high-quality mesophase pitch

A mesophase pitch, high-quality technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, chemical processing of tar pitch/petroleum pitch/natural pitch, petroleum industry, etc., can solve the problem of difficult recovery and recycling of catalysts , Increase the ash content of mesophase pitch, reduce the quality of carbon products, etc., achieve low softening point, improve product performance, and good spinnability

Active Publication Date: 2019-08-06
上海高强高模新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this preparation method, solid catalysts such as aluminum trichloride and alumina are difficult to separate from the reaction system, so there is a shortcoming that the catalyst is difficult to recycle and reuse, and the residual catalyst will increase the ash content in the prepared mesophase pitch and reduce carbon dioxide. The quality of vegetarian products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This example provides a kind of preparation method of high-quality mesophase pitch, and it comprises the following steps:

[0042] (1) Statically settle the petroleum asphalt at 50°C for 24 hours, take the upper layer component and add 2 times the volume of a 10:1 mixed solvent of acetone and tetrahydrofuran, stir well, and filter to remove the soluble components in the solvent . Evaporate the filtrate to dryness at 50°C to obtain purified petroleum asphalt.

[0043] (2) Purified petroleum asphalt and tetrabenzophenazine are mixed with the ratio of mass ratio 1:0.1, and tetrahydroquinoline is added (feeding quality is 10% of the total mass of purified petroleum asphalt and tetrabenzophenazine), set In the first stage high temperature and high pressure reactor. After airtight, feed high-purity nitrogen, and maintain the pressure in the reactor at 5 MPa; raise the temperature in the reactor to 300°C at a heating rate of 40°C / hour, and stir the reaction for 10 hours unde...

Embodiment 2

[0050] This example provides a kind of preparation method of high-quality mesophase pitch, and it comprises the following steps:

[0051] (1) Statically settle the petroleum asphalt at 70°C for 20 hours, take the upper layer component and add 3 times the volume of an 8:1 mixed solvent of acetone and tetrahydrofuran, stir well, and filter to remove the soluble components in the solvent . Evaporate the filtrate to dryness at 70°C to obtain purified petroleum asphalt.

[0052] (2) Mix purified petroleum pitch and anthrone violet at a ratio of 1:0.3, add 20% dihydroanthracene, and place it in the first-stage high-temperature and high-pressure reactor. After airtight, feed high-purity nitrogen and maintain the pressure in the reactor at 5.5MPa; raise the temperature in the reactor to 320°C at a heating rate of 55°C / hour, and stir for 8 hours at the reaction temperature to obtain a hydrogenated intermediate product of the body.

[0053] (3) Transfer the product obtained in the pr...

Embodiment 3

[0059] This example provides a kind of preparation method of high-quality mesophase pitch, and it comprises the following steps:

[0060] (1) Statically settle the petroleum asphalt at 85°C for 17 hours, take the upper layer component and add 4 times the volume of a 6:1 mixed solvent of acetone and tetrahydrofuran, stir well, and filter to remove the soluble components in the solvent . Evaporate the filtrate to dryness at 90°C to obtain purified petroleum asphalt.

[0061] (2) Mix purified petroleum asphalt and methylnaphthalene at a ratio of 1:0.4, add 30% tetrahydronaphthalene, and place it in the first-stage high-temperature and high-pressure reactor. After airtight, feed high-purity nitrogen, and maintain the pressure in the reactor at 6MPa; raise the temperature in the reactor to 360°C at a heating rate of 70°C / hour, and stir the reaction for 7.5 hours under the reaction temperature condition to obtain the hydrogenated intermediate product of the body.

[0062] (3) The...

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Abstract

The invention relates to a preparation method of high-quality mesophase pitch. The preparation method comprises the following steps: (1) purifying a petroleum pitch raw material by adopting settling and solve purifying methods to obtain purified petroleum pitch; (2) by taking purified petroleum pitch and a pure aromatic hydrocarbon compound as raw materials, carrying out hydrotreatment on the raw materials by adopting a hydrogenation process under a certain condition, so that a hydrogenation intermediate with a certain hydrogenation quantity is obtained; and (3) adding a small amount of HF / BF3 catalyst into the obtained hydrogenation intermediate, and carrying out two-step pyrocondensation polymerization, so that the high-quality mesophase pitch is obtained. The preparation method provided by the invention not only organically combines respective advantages of the petroleum pitch and the pure aromatic hydrocarbon compound in preparation of the mesophase pitch, the defects possibly existing in composition and properties of a single raw material can be made up, product performance is effectively improved, and the problem that corrosion on equipment can be caused by usage of a great quantity of HF / BF3 catalyst, so that production cost can be reduced to some extent.

Description

technical field [0001] The invention belongs to the technical field of synthetic pitch preparation, and in particular relates to a preparation method of high-quality mesophase pitch. Background technique [0002] Mesophase pitch is a substance composed of a variety of sheet-like fused-ring polycyclic aromatic hydrocarbons with an average relative molecular weight of about 2000, and its molecules are mostly sheet-like aromatic ring structures. These sheet-like aromatic ring structures are very complex, mainly composed of highly condensed aromatic hydrocarbons, a small amount of alkyl side chains, and naphthenic structures, stacked to form various liquid crystal structures, and exhibit extinction characteristics under a polarizing microscope. As a typical representative of high-quality synthetic pitch, mesophase pitch has many advantages such as abundant raw materials, low price, high carbon yield, high oxidation activity, high purity, low viscosity, good spinnability, and goo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02
CPCC10C3/026
Inventor 庞守德查凌驰刘怀成
Owner 上海高强高模新材料科技有限公司
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