Method for producing raw material for needle-like coke

A technology of needle coke raw material and production method, which is applied to the refining and cracking process treatment of multi-stage series connection, petroleum industry, processing of hydrocarbon oil, etc. rate and other issues, to achieve the effects of low cost, high yield, and large operational flexibility

Active Publication Date: 2017-06-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After research, it is found that the disadvantages of the above method are: a large number of raw material fractions are cracked, which reduces the yield of needle coke; Raw material utilization

Method used

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  • Method for producing raw material for needle-like coke
  • Method for producing raw material for needle-like coke
  • Method for producing raw material for needle-like coke

Examples

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Embodiment 1

[0057] In Example 1, the raw material oil is a mixture of vacuum residue and catalytic cracking oil slurry with a mass ratio of 1:1, and the added catalyst is LBO-16 catalytic cracking catalyst, and the addition amount is 0.5% of the raw material oil quality; Example 2 The raw material oil is catalytic cracking oil slurry; the raw material oil in Example 3 is ethylene tar, and the added catalyst is CHN-1 residual oil catalytic cracking catalyst, and the added amount is 3% of the raw material oil quality. The properties of the raw oil are shown in Table 1, the main process conditions of visbreaking are shown in Table 2; the main process conditions of solvent deasphalting are shown in Table 3; the properties of the needle coke raw materials obtained in the examples are shown in Table 4.

[0058] The raw material oil properties used in the embodiment of table 1

[0059]

[0060]

[0061] Table 2 Main process conditions of visbreaking reaction

[0062] project E...

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Abstract

The invention relates to a method for producing a raw material for needle-like coke. The method comprises viscosity-breaking treatment and solvent deasphalting treatment and comprises the following steps: (1) heating catalyst mixed raw oil with a heater, then, enabling the heated raw oil to enter a viscosity breaking reactor, carrying out a catalytic viscosity-breaking reaction, and enabling a viscosity-broken material to enter a fractionating tower, so as to separate dry gas, a gasoline fraction and a viscosity-broken heavy component oil; and (2) subjecting the viscosity-broken heavy component oil obtained in the step (1) to heat exchange, then, feeding the viscosity-broken heavy component oil to an extraction tower for solvent deasphalting, and subjecting a tower top component to desolventizing so as to obtain deasphalted oil for producing the needle-like coke; and subjecting a tower bottom component to desolventizing so as to obtain deoiled asphalt for producing asphalt or asphalt blended components. According to the method, components with relatively high cracking activity, components with high polymerization activity and a large number of impurities such as catalyst fines, heavy metals, sulfur and nitrogen, which are unfavorable to the production of the needle-like coke, can be effectively removed from the oil, and thus, the obtained raw material for the needle-like coke is high in yield and good in property. The residual component can be used for producing the asphalt and the blended components thereof, so that the added value of raw material utilization is increased.

Description

technical field [0001] The invention relates to a process for producing needle coke raw materials. Specifically, it is a method in which needle coke raw materials are produced by first visbreaking and then solvent deasphalting, and road asphalt or asphalt blending components are produced at the same time. Background technique [0002] Needle coke is the main raw material for producing high-power and ultra-high-power graphite electrodes. The most critical issue in the production of needle coke is the selection and handling of raw materials. According to the coke formation mechanism of needle coke, the raw materials for producing needle coke must meet the requirements of high aromatic content, among which the content of linearly connected three-ring and four-ring short side chain aromatics is mostly, generally requiring the content of aromatics to reach 30%-50%; colloid Colloids and asphaltenes are low in content. Colloids and asphaltenes are hydrocarbon compounds with macro...

Claims

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Application Information

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IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/206
Inventor 于志敏付兴国张艳梅刘银东侯经纬张璐瑶赵广辉张东明卢竟蔓许倩
Owner PETROCHINA CO LTD
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