Ethylene bottom oil complex processing technology

A technology for comprehensive processing of ethylene tar, applied in the direction of tar processing through distillation, hydrocarbons, chemical instruments and methods, etc., can solve the problems of difficult control of the reaction process, low quality, complicated operation process, etc.

Active Publication Date: 2007-05-30
浙江美阳国际工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) The quality of industrial naphthalene is not high, and the content is about 83%;
[0009] (2) Although the content of mixed methylnaphthalene is greater than 63%, the color is light yellow and cannot be used as a colorless solvent;
[0010] (3) During the alkylation polymerization reaction before the separation of methylnaphthalene, a solid acid mixed acid catalyst is added to carry out the alkylation polymerization reaction, the operation process is complicated, and the reaction process is difficult to control

Method used

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  • Ethylene bottom oil complex processing technology

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Experimental program
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Effect test

Embodiment 1

[0020] Ethylene tar first enters the pre-fractionation tower and is fractionated into light components and heavy components at 275°C. The heavy components with a boiling point greater than 275°C are used as carbon black oil or fuel oil, and those with a boiling point lower than 275°C are used as light components.

[0021] Hydrofining of light components, after hydrogenation, the bromine value of light components drops from 96.6g / 100ml to 33.9g / 100ml; the hydrogenation conditions are t=260°C, p=3.5MPa, and the catalysts used are Ni, Mo, Al 2 o 3 .

[0022] After hydrofining, it enters four series and continuous rectification towers, and solvent oil I, industrial naphthalene (refined naphthalene), β-methylnaphthalene, α-methylnaphthalene, mixed methylnaphthalene, and solvent oil II are respectively cut.

[0023] The resulting product quality is:

[0024] Refined naphthalene

Embodiment 2

[0026] Ethylene tar first enters the pre-fractionation tower and is fractionated into light components and heavy components at 270°C. The heavy components with a boiling point greater than 270°C are used as carbon black oil or fuel oil, and those with a boiling point lower than 270°C are used as light components;

[0027] Hydrofining of light components, after hydrogenation, the bromine value of light components drops from 106.3g / 100ml to 34.1g / 100ml; the hydrogenation conditions are t=260°C, p=3.5MPa, and the catalysts used are Co, Mo, Al 2 o 3 .

[0028] After hydrofining, it enters four series and continuous rectification towers, and solvent oil I, industrial naphthalene (refined naphthalene), β-methylnaphthalene, α-methylnaphthalene, mixed methylnaphthalene, and solvent oil II are respectively cut.

[0029] The resulting product quality is:

[0030] Refined naphthalene

Embodiment 3

[0032] Ethylene tar first enters the pre-fractionation tower and is fractionated into light components and heavy components at 268°C. The heavy components with a boiling point greater than 268°C are used as carbon black oil or fuel oil, and those with a boiling point lower than 268°C are used as light components.

[0033] Hydrofining of light components, after hydrogenation, the bromine value of light components drops from 95.8g / 100ml to 32.9g / 100ml; the hydrogenation conditions are t=252°C, p=3.5MPa, and the catalysts used are Ni, Mo, Al 2 o 3 .

[0034] After hydrofining, it enters four series and continuous rectification towers, and solvent oil I, industrial naphthalene (refined naphthalene), β-methylnaphthalene, α-methylnaphthalene, mixed methylnaphthalene, and solvent oil II are respectively cut.

[0035] The resulting product quality is:

[0036] Refined naphthalene

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Abstract

The invention discloses an extracting method of industrial refined naphthalene, alpha-methylnaphthalene, beta-methylnaphthalene from ethylene tar, which is characterized by the following: prefractionating ethylene tar under 260-280 deg.c; hydrogenating light fractionated component under 160-300 deg.c at 3.0-4.0Mpa to remove insaturated hydrocarbons; rectifying to separate refined naphthalene with crystallizing point at 79.6 deg.c; obtaining alpha-methylnaphthalene and beta-methylnaphthalene with each purity over 95%.

Description

technical field [0001] The invention relates to a chemical process, in particular to a comprehensive processing process for extracting industrial naphthalene (refined naphthalene), β-methylnaphthalene, α-methylnaphthalene, mixed methylnaphthalene and solvent oil from ethylene tar. Background technique [0002] For a long time, due to the wide range of uses of naphthalene and naphthalene-based products, they cannot meet the growing domestic demand. In recent years, they have been relying on imports to make up for the gap between supply and demand, especially industrial naphthalene (refined naphthalene), and the annual growth rate of imports has continued to increase. [0003] my country's petroleum processing capacity continues to increase, ethylene production continues to expand, and ethylene tar production also continues to increase. At present, ethylene tar is basically used as fuel oil or carbon black oil, without deeper comprehensive utilization. [0004] The patent appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/12C07C7/163
Inventor 杨东平
Owner 浙江美阳国际工程设计有限公司
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