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A combined process method for producing needle coke

A combined process, needle coke technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of short operation cycle, frequent switching protection, and too much catalyst powder of fixed-bed hydrogenation reaction unit, and achieve The effect of reducing sulfur content without affecting aromatic content and prolonging operation cycle

Active Publication Date: 2020-03-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the characteristics of large amount of catalyst powder and high sulfur content in the catalytic oil slurry, when dealing with the above problems in the existing technology, there are problems such as frequent switching of the protection reactor and short operation period of the fixed bed hydrogenation reaction device. The present invention proposes a production needle The combined process method of shaped coke uses an ebullating bed reactor to pretreat the catalytic oil slurry. During the pretreatment of the catalytic oil slurry, the influence of the catalyst powder can be basically eliminated, the sulfur content can be reduced, and the prolongation The operation cycle of the device produces high-quality needle coke

Method used

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  • A combined process method for producing needle coke
  • A combined process method for producing needle coke
  • A combined process method for producing needle coke

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Experimental program
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Effect test

Embodiment 1

[0036] The properties of the catalytic cracking raw materials used in the test are shown in Table 1, and the properties of the catalyst filled in the ebullated bed reactor are shown in Table 2. The middle distillate generated by the ebullated bed reaction is recycled to the catalytic cracking reactor with a circulation ratio of 0.1, and the final boiling point of light components is 180 °C , the final boiling point of the middle component is 300°C, see Table 3 for catalytic cracking reaction conditions, see Table 4 and Table 5 for the reaction conditions of the ebullated bed reactor and coking unit, respectively, and use the gas produced by the ebullated bed reactor as the The gas used for "pull focus". See Table 6 and Table 7 for the product distribution and needle coke product properties of the catalytic cracking unit.

Embodiment 2

[0038] Example 2 has the same raw material properties as Example 1, except that the middle distillate produced by the ebullated bed reaction is recycled back to the catalytic cracking reactor with a circulation ratio of 0.2, wherein the final boiling point of the light components is 180°C, and the final distillation of the middle components is The temperature is 300°C, see Table 3 for catalytic cracking reaction conditions, see Table 4 and Table 5 for the reaction conditions of ebullating bed reactor and coking unit, respectively, and use the gas produced by ebullating bed reactor as the gas used for "coke pulling" during the coking reaction . See Table 6 and Table 7 for the product distribution and needle coke product properties of the catalytic cracking unit.

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Abstract

The invention provides a combined technological method for producing needle coke. The method comprises the following steps: raw oil enters a catalytic cracking unit; catalytic slurry oil obtained after reactive separation is mixed with hydrogen, and the mixture enters a boiling-bed reactor; heavy components of a liquid product obtained after separation of reaction effluent of the boiling-bed reactor enters a coking unit, after oil and gas generated in a pyrogenic reaction are separated, gas, coked gasoline, coked diesel and coked gas oil are obtained, and the needle coke generated after the reaction period is deposited in the coking unit. According to the method, the boiling-bed reactor is adopted for pretreatment of the catalytic slurry oil, on the premise that content of aromatic hydrocarbon is hardly lost during pretreatment of the catalytic slurry oil, influence of catalyst powder can be eliminated basically, sulfur content is reduced, running period of devices is prolonged, and high-quality needle coke is produced.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
CPCC10G67/14
Inventor 孟兆会杨涛刘建锟葛海龙贾永忠蒋立敬
Owner CHINA PETROLEUM & CHEM CORP