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Method for preparing mesophase pitch by microwave heating

A mesophase pitch and microwave heating technology, which is applied in the direction of distillation processing of tar pitch/petroleum pitch/natural pitch, etc., can solve problems such as unstable quality of mesophase products, uneven heating, and long-term operation of the device, so as to avoid Easy to coke, uniform microwave heating, ensure the effect of long-term operation

Active Publication Date: 2021-12-10
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a microwave heating, fast heating, uniform heating, environmental protection, and high-quality mesophase pitch products, avoid coking, and ensure the long-term operation of the microwave heating method for preparing mesophase pitch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method of preparing a microwave heating intermediate mesophase pitch, comprising the steps of:

[0020] The vacuum residue of about 30g 100mL tall beaker placed; tall beaker placed in a small microwave oven test, high purity nitrogen gas into the furnace to replace air Microwave experiments were continued charged with nitrogen to a pressure 0.5MPa, open small microwave oven heating test; rapidly heating temperature was raised to 360 deg.] C, then adjust the power of the microwave apparatus of the reactor at 2 ℃ / min heating to 400 ℃, the reaction pressure was 0.5MPa, the reaction 15H; after completion of the reaction the pressure was released to atmospheric pressure, cooled to room temperature to obtain an anisotropic structure content of 95% mesophase pitch under a polarizing optical basin intermediate structure, a softening point of 289 ℃.

[0021] The optical structure of mesophase pitch content and the anisotropic structure obtained by polarized light microscopy and ...

Embodiment 2

[0023] A method of preparing a microwave heating intermediate mesophase pitch, comprising the steps of:

[0024] The catalytic slurry of about 30g 100mL tall beaker placed; tall beaker placed in a small microwave oven test, high purity nitrogen gas into the furnace to replace air Microwave experiments were continued charged with nitrogen to 2 MPa pressure, a small opening microwave oven heating test; rapidly heating temperature was raised to 360 deg.] C, then adjust the power of the microwave apparatus of the reactor at 5 ℃ / min was heated to 450 ℃, a reaction pressure of 2MPa, the reaction 8H; after completion of the reaction the pressure was released to atmospheric pressure, cooled to room temperature to obtain an anisotropic structure content of 97% mesophase pitch under a polarizing optical basin intermediate structure, a softening point of 310 ℃.

[0025] The optical structure of mesophase pitch content and the anisotropic structure obtained by polarized light microscopy and...

Embodiment 3

[0027] A method of preparing a microwave heating intermediate mesophase pitch, comprising the steps of:

[0028] The petroleum pitch about 30g 100mL tall beaker placed; tall beaker placed in a small microwave oven test, high pure nitrogen to replace air in the furnace of a small microwave experiments continue purged with nitrogen pressure to 3 MPa, a small opening microwave oven heating test; rapidly heating temperature was raised to 360 deg.] C, then adjust the power of the microwave apparatus of the reactor at 10 ℃ / min was heated to 480 deg.] C, a reaction pressure of 3MPa, the reaction 3H; after completion of the reaction the pressure was released to atmospheric pressure, cooled to room temperature to obtain an anisotropic structure content of 96%, the intermediate pitch under a polarizing phase basin optical structure, a softening point of 295 ℃.

[0029] The optical structure of mesophase pitch content and the anisotropic structure obtained by polarized light microscopy and...

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Abstract

The invention relates to a method for preparing mesophase pitch by microwave heating, which comprises the following steps: 1) using heavy oil as a raw material; 2) microwave heating; 3) preparing a mesophase pitch product. The present invention uses heavy oil as raw material, adopts microwave method to heat heavy oil, converts microwave electromagnetic energy into thermal energy, produces thermal effect, and makes heavy oil evenly heated to a certain temperature in a relatively short period of time to undergo cracking and decomposing. The condensation reaction can not only reduce the problems of uneven heating of materials, high wall temperature and long heating time in the traditional heating process, but also it is easier to control the reaction time, reaction temperature and heating power by using microwave heating; Substances have different effects, which is extremely beneficial for asphalt modification, automatically balances the absorption of microwaves, and avoids coking when the asphalt mixture is heated. The mesophase pitch prepared by the invention has high content of anisotropic structure, and the distribution of anisotropic structure is uniform.

Description

Technical field [0001] The present invention relates to the preparation of carbon materials technical field, particularly relates to a method of preparing a microwave heating phase intermediate pitch. Background technique [0002] Mesophase pitch is a new carbon material precursor, needle coke, pitch-based carbon fiber of high performance, high value-added carbon material are prepared by conversion of mesophase pitch. Determine the quality mesophase pitch carbon material properties late. [0003] At home and abroad in the middle of preparing a mesophase pitch methods are: Hydrogen synthesis method, a modified alkylation, catalytic reforming method, a new method and a co-carbonized mesophase modification method, mesophase pitch is mainly Patent CN105238431 , CN107201248, CN107163970, CN107384462, CN104610994, CN102942945 and so on. These methods are to improve the properties of the raw material pretreatment and reactant viewpoint, the heating methods used for the thermal radiation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/06
CPCC10C3/06
Inventor 李华佘喜春田娟朱国荣黄华何驰剑刘晨
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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