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Pretreatment method for producing needle coke raw material

A needle coke raw material and pretreatment technology, which is applied in the treatment of hydrocarbon oil, hydrotreating process, petroleum industry, etc., can solve the problems of non-uniformity, large influence of needle coke morphology and thermal expansion coefficient, etc.

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the above method, the raw material of needle coke is mainly produced by reducing the sulfur content in the raw material and increasing the aromatic content in the raw material. The raw materials produced by different pretreatment methods have a great influence on the performance of the needle coke, especially on the morphology characteristics of the needle coke. However, the shape characteristics of needle coke are related to its thermal expansion coefficient, but the current measurement methods for thermal expansion coefficient are not uniform, and the thermal expansion coefficient is greatly affected in the process of sample preparation

Method used

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  • Pretreatment method for producing needle coke raw material
  • Pretreatment method for producing needle coke raw material

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Embodiment 1

[0022] Utilize the method of the present invention to process the catalytic oil slurry of a refinery in China as shown in Table 1. The oil slurry is first filtered and pretreated. Hydrogen treatment device, the active components of the hydrogenation catalyst are Ni and W. The hydrogenation reaction temperature is 380°C, the reaction hydrogen partial pressure is 3.0MPa, and the hydrogen-to-oil ratio is 200 Nm 3 / m 3 , the volume space velocity is 0.8h -1 , 30 (w)% of the hydrogenated oil is sent to the vacuum distillation device, the pressure of the vacuum distillation is 20mmHg, and the temperature is 400°C. After passing through the vacuum distillation device, the separated light distillate oil and the remaining 70 (w) The final high-quality needle coke raw material is obtained after the hydrogenated oil is mixed. The properties of the final high-quality needle coke raw materials are shown in Table 2. figure 1 It is the needle coke fiber structure observed under the scann...

Embodiment 2

[0024] Utilize the method of the present invention to process the catalytic oil slurry of a domestic refinery as shown in Table 1. The oil slurry is first filtered and pretreated. Hydrogen treatment device, the active components of the hydrogenation catalyst are Ni and W. The hydrogenation reaction temperature is 350°C, the reaction hydrogen partial pressure is 2.5MPa, and the hydrogen-to-oil ratio is 300 Nm 3 / m 3 , the volumetric space velocity is 2.5h -1 , 40 (w)% of the hydrogenated oil is sent to the vacuum distillation device, the pressure of the vacuum distillation is 60mmHg, and the temperature is 350°C. After passing through the vacuum distillation device, the separated light distillate oil and the remaining 60 (w) The final high-quality needle coke raw material is obtained after the hydrogenated oil is mixed. The properties of the final high-quality needle coke raw materials are shown in Table 2. image 3 It is the needle coke fiber structure observed under the s...

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Abstract

The invention discloses a pretreatment method for producing needle coke raw material from catalytic slurry oil. The method includes the following steps: filtering the catalytic oil slurry and subjecting the catalytic oil slurry to a mild hydrogenation treatment; introducing 20-50 wt% of the oil produced by hydrogenation into a vacuum distillation device with the operation conditions of pressure of 5-100 mmHg and temperature of 300-450 DEG C; and mixing the hydrogenation light distillates and the rest oil produced by hydrogenation and using the mixture as the raw material for production of needle coke. The method is applicable to production of needle coke raw material from the catalytic slurry oil rich in aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a pretreatment method for producing needle coke raw materials, in particular to a pretreatment method for producing needle coke raw materials with catalytic oil slurry. Background technique [0002] Needle coke is a high-quality carbon raw material vigorously developed in the 21st century. Needle coke is made into carbon products after calcination and graphitization. In addition to the steel industry, needle coke is also widely used in industry, national defense, medical treatment, aerospace and atomic energy, so it has attracted widespread attention from various countries. [0003] The most critical issues in the production of needle coke are the selection and pretreatment of raw materials. According to the coke formation mechanism of needle coke, the raw materials for producing needle coke must meet the high content of aromatics, among which the content of linearly connected tricyclic and tetracyclic short side chain aromat...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 初人庆彭绍忠杜正军矫德卫勾连忠
Owner CHINA PETROLEUM & CHEM CORP
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