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Ethylene tar treatment process

A treatment process, a technology for ethylene tar, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problem of shortening the operation cycle, and achieve the effect of controlling the residence time, reducing the degree of back mixing, and facilitating the residence time.

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Using the treatment process of the present invention, ethylene tar is contacted with the delayed coking reaction effluent in the pretreatment reactor to separate light components and heavy components, and the light components enter the hydrogenation reaction system, and the hydrogenation reactor successively Through FZC-102B, FZC-103, FF-26 and FF-46 catalysts, the volume ratio of the four catalysts is 7:18:35:40, and the reaction products are separated to obtain gas, hydrogenated gasoline fraction, hydrogenated diesel fraction and hydrogenated Hydrogenated heavy oil fractions; hydrogenated heavy oil fractions enter the catalytic cracking reaction system, the grade of catalytic cracking catalyst used is RICC-1, under the action of the catalyst, gas, catalytic cracking gasoline fractions, catalytic cracking diesel fractions and catalytic cracking heavy oil fractions; catalytic cracking diesel fractions Enter the pretreatment reactor together with the ethylene ta...

Embodiment 2

[0048] The method of embodiment 2 is similar to that of embodiment 1, the difference is that the catalytic cracking diesel fraction is used as a product discharge device and does not enter the pretreatment reactor.

[0049] The reaction of the device stops after 600 hours of operation, and the operation is stable within 600 hours. There is little difference in the yield and distribution of liquid products between 50 hours and 600 hours. Compared with Example 1, the gasoline fraction generated in Example 2 has a low yield, and the FCC diesel fraction is rich in aromatics and relatively poor in quality.

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Abstract

The invention discloses an ethylene tar treatment process, which comprises that preheated ethylene tar contacts a coking reaction effluent from a delayed coking reaction system in a pretreatment reactor, and a light component and a heavy component are obtained after separation; the heavy component and delayed coking raw material oil enter 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, gasoline distillate,diesel oil distillate and heavy oil distillate; and the heavy oil distillate enters a catalytic cracking reaction system, and the catalytic diesel oil obtained after separation enters the pretreatmentreaction. With the process 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 processing technology for 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 m...

Claims

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Application Information

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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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