Ethylene tar treating method

A treatment method, ethylene tar technology, applied in the treatment of hydrocarbon oil, hydrotreating process, petroleum industry, etc., can solve the problems of shortening the operation cycle, etc., and achieve the effect of improving liquid collection, increasing gas velocity, and good thermal stability

Active Publication Date: 2019-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not specify the delayed coking process, it can be considered that the conventional delayed coking process is adopted
However, some refineries try to use the heavy component of ethylene tar as the delayed coking raw material, that is, the ethylene tar is sent to the delayed coking tower for reaction after heat exchange at the bottom of the fractionating tower and heating in the heating furnace. shorten

Method used

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Examples

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Effect test

Embodiment 1

[0044] Examples Using the method of the present invention, ethylene tar is contacted with delayed coking and catalytic cracking reaction effluents in a pretreatment reactor to separate light components and heavy components. The light component enters the hydrogenation reaction system, and passes through FZC-102B, FZC-103, FF-26 and FF-46 catalysts in sequence in the hydrogenation reactor. The volume ratio of the four catalysts is 10:10:45:35. The product is separated to obtain gas, hydrogenated gasoline fraction, hydrogenated diesel fraction and hydrogenated heavy oil fraction; the hydrogenated heavy oil fraction enters the catalytic cracking reaction system. Reactor; the heavy component discharged from the bottom of the pretreatment reactor is sent to the delayed coking reaction system, and AlCl is injected into the pipeline before entering the tower 3 The aqueous, coking reaction effluent also enters the pretreatment reactor. The specific operating process conditions are li...

Embodiment 2

[0047] Similar to Example 1, the difference is that AlCl is not injected into the pipeline before entering the tower 3 aqueous solution. The specific operating process conditions are listed in Table 2, and the liquid product distribution is listed in Table 3. After the device was running for 600 hours, the reaction was stopped, and the FF-26 catalyst in the hydrogenation reactor was taken out, and the carbon content was analyzed, as shown in Table 4.

[0048] The device ran smoothly within 600 hours. Compared with Example 1, the distillate yield at 180°C to 350°C was slightly different at 50h and 600h, and the amount of carbon deposited on the hydrotreated FF-26 catalyst was slightly higher.

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Abstract

The present invention provides an ethylene tar treating method, which comprises that preheated ethylene tar enters a pretreatment reactor, and contacts a coking reaction effluent from a delayed cokingreaction system and a reaction effluent from a catalytic cracking reaction system, and a light component and a heavy component are obtained after separation; the heavy component enters the delayed coking reaction system, and the generated coking reaction effluent enters the pretreatment reactor; the light component and hydrogen enter a hydrogenation reaction system, and the reaction effluent is separated to obtain gas, a hydrogenated gasoline distillate, a hydrogenated diesel oil distillate and a hydrogenated heavy oil distillate; and the hydrogenated heavy oil distillate enters a catalytic cracking reaction system, and the reaction effluent directly enters the pretreatment reactor through the second material inlet of the pretreatment reactor. With the treating method of the present invention, the stable long-cycle operation of the whole treatment system can be ensured, and the yield of the light oil product is high.

Description

technical field [0001] The invention relates to a method for processing inferior oil products, in particular to a method for processing ethylene tar. Background technique [0002] Ethylene tar is a by-product produced during steam cracking of raw materials such as naphtha to produce ethylene. It is a high-temperature polymer of raw materials and their products. It is mainly composed of condensed ring aromatics and aromatic olefins without side chains or with short side chains. , and its yield is about 15% of that of ethylene. The 10% distillation temperature of ethylene tar is about 200°C, the 90% distillation temperature is higher than 600°C, and the distillation range distribution is wide. The aromatic content of ethylene tar is as high as 90wt%, the Kangxi residual carbon is generally greater than 10wt%, and the density at 20°C is greater than 1.0g / cm 3 , Sulfur, nitrogen, metal and other impurities are low, and the ash content is also very small. Ethylene tar in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/00
Inventor 郭丹勾连忠初人庆矫德卫宋永一刘继华
Owner CHINA PETROLEUM & CHEM CORP
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