阅读说明：本技术 一种制备高导热碳纤维用中间相沥青的方法 (Method for preparing mesophase pitch for high-thermal-conductivity carbon fibers ) 是由 王新筑 于 2020-05-15 设计创作，主要内容包括：本发明提供一种制备高导热碳纤维用中间相沥青的方法,包括以下步骤：(1)将石油渣油于100℃下热过滤,得到颗粒物直径≤0.2μm的精制渣油。(2)将精制渣油雾化,并连续地注入反应器中在460～480℃下进行反应,当反应器内的压力超过反应器顶部阀门的设定压力时,低沸点产物作为副产物排出；当沉降于底部的高沸点产物的液位达到一定高度时,高沸点产物排出。本发明方法具有产品收率高、对设备控制精度要求低、能够大规模连续化工业生产的优势。与现有方法相比,生产相同质量的中间相沥青,成本节约50％以上。(The invention provides a method for preparing mesophase pitch for high-thermal-conductivity carbon fibers, which comprises the following steps of: (1) the petroleum residual oil is filtered under the temperature of 100 ℃ to obtain refined residual oil with the particle diameter less than or equal to 0.2 mu m. (2) Atomizing refined residual oil, continuously injecting the atomized refined residual oil into a reactor, reacting at 460-480 ℃, and discharging a low-boiling-point product as a byproduct when the pressure in the reactor exceeds the set pressure of a valve at the top of the reactor; when the liquid level of the high boiling point product settled at the bottom reaches a certain height, the high boiling point product is discharged. The method has the advantages of high product yield, low requirement on equipment control precision and large-scale continuous industrial production. Compared with the prior art, the method can save the cost by more than 50 percent when producing the mesophase pitch with the same quality.)

1. A method for preparing mesophase pitch for high-thermal-conductivity carbon fibers is characterized by comprising the following steps:

(1) hot filtering petroleum residual oil at 100 deg.c to obtain refined residual oil with particle size not greater than 0.2 micron;

(2) atomizing refined residual oil, continuously injecting the atomized refined residual oil into a reactor, reacting at 460-480 ℃, and discharging a low-boiling-point product as a byproduct when the pressure in the reactor exceeds the set pressure of a valve at the top of the reactor; when the liquid level of the high boiling point product settled at the bottom reaches a certain height, the high boiling point product is discharged.

2. The method as claimed in claim 1, wherein the pore size of the filter element used for the hot filtration of the petroleum residue in the step (1) is less than or equal to 0.2 μm.

3. The method according to claim 1, wherein the atomized refined residue in the step (2) has an atomized particle size of 1 to 10 μm.

4. The method according to claim 1, wherein the set pressure of the top valve in the step (2) is 0.1 to 2.0 MPa.

5. The process according to any one of claims 1 to 4, wherein the liquid level in step (2) is 5 to 10% of the height of the reactor.

6. The device applied to the method of any one of claims 1 to 5, which is characterized by comprising an atomizer and a reactor, wherein the upper part of the reactor is provided with a top one-way valve, the lower part of the reactor is provided with a bottom automatic liquid discharge valve, the atomizer is arranged at the top of the reactor, and an outlet of the atomizer is opposite to the reactor.

7. The apparatus of claim 6, wherein the residuum enters the atomizer through a high pressure pump; the pressure of the high-pressure pump is 5-15 MPa.

8. The apparatus of claim 6, wherein the reactor has a maximum design temperature of 550 ℃ and a design pressure of 5 MPa.