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Combined technological method for producing needle coke from coal tar

A technology combining process and process method, applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc., can solve the problems of small thermal expansion coefficient, low impurity content, low ash content of needle coke, etc., to improve the properties of raw materials, fiber Well-structured and effective

Active Publication Date: 2018-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of high energy consumption in the distillation operation to remove quinoline insolubles and high impurity content in the raw material of coal-based needle coke existing in the existing technology, the present invention proposes a combined process method for producing needle coke from coal tar. The refined coal tar raw material obtained by the inventive method has the advantages of low content of quinoline insolubles, low content of S and N impurities, etc., and the needle coke produced has the advantages of small thermal expansion coefficient, low sulfur content, low ash content, etc.

Method used

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  • Combined technological method for producing needle coke from coal tar
  • Combined technological method for producing needle coke from coal tar
  • Combined technological method for producing needle coke from coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] See Table 1 for the properties of the coal tar used in the test, see Table 2 for the properties of the catalyst filled in the ebullated bed reactor, and circulate the light components generated by the ebullated bed reaction back to the buffer tank with a circulation ratio of 0.2. See Table 3 for the pretreatment conditions. See Table 4 and Table 5 for the reaction conditions of the coking unit. During the coking reaction, the waste hydrogen produced by the ebullating bed reactor is used as the gas used for "coking". See Table 6 and Table 7 for the properties of coal tar raw materials after pretreatment and the properties of needle coke products.

Embodiment 2

[0036] Embodiment 2 has the same raw material properties as in Example 1, and the light components generated by the ebullated bed reaction are circulated back to the buffer tank, and the circulation ratio is 0.4. The pretreatment conditions are shown in Table 3, and the reaction conditions of the ebullated bed reaction device and the coking device are shown in Table 4 and Table 5, the waste hydrogen produced by the ebullated bed reactor is used as the gas used for "coke pulling" during the coking reaction. See Table 6 and Table 7 for the properties of coal tar raw materials after pretreatment and the properties of needle coke products.

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Abstract

The invention provides a combined technological method for producing needle coke from coal tar. The combined technological method comprises following steps: coal tar after a coal tar raw material is pretreated enters a boiling-bed reactor, after a reaction, a liquid product obtained through separation is subjected to fractional distillation, a light component and a heavy component are obtained, and the light component is mixed with the coal tar raw material; the heavy component enters a coking device and is subjected to a coking reaction, and after separation, gas, coked gasoline, coked diesel, coked gas oil and needle coke are obtained. The refined coal tar raw material obtained with the method has the advantages of low quinoline insoluble content, low S and N impurity content and the like, and the produced needle coke has the advantages of low coefficient of thermal expansion, low sulfur content, low ash content and the like.

Description

technical field [0001] The invention relates to a process for producing high-quality needle-shaped coke, in particular, an expanded-bed or ebullating-bed process is used to process catalytic cracking oil slurry to produce high-quality needle-shaped coke. Background technique [0002] Needle coke is a coke with special properties produced during the thermal conversion of coal-based or oil-based raw materials. Needle coke is an important raw material in the carbon industry, which has the advantages of low thermal expansion coefficient and good graphitization performance. After being broken, the shape is needle-like, and it has obvious fibrous structure and high anisotropy under the microscope. Power electrode steelmaking can improve steelmaking efficiency, reduce power consumption, and reduce steelmaking costs, and has significant economic and social benefits. [0003] Needle coke can be divided into coal-based needle coke and petroleum-based needle coke according to the sou...

Claims

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Application Information

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IPC IPC(8): C10G67/06
CPCC10G67/06C10G2300/202C10G2300/70
Inventor 孟兆会杨涛葛海龙刘建锟贾永忠蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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