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Anthracene oil hydrogenation method

An anthracene oil and hydrofining technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of low hydrogenation liquid yield, low circulating hydrogen partial pressure, and incomplete hydrogenation reaction, etc., and achieve conversion High efficiency, increased hydrogen partial pressure, improved reaction depth and hydrogenation effect

Active Publication Date: 2016-04-06
HUADIAN HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low partial pressure of circulating hydrogen, incomplete hydrogenation reaction, and low yield of hydrogenation liquid in the two-stage hydrogenation process in the prior art, thereby providing a process flow A kind of anthracene oil hydrogenation method with simple equipment and high conversion rate

Method used

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Examples

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Effect test

Embodiment 1

[0033] In this example, fixed-bed hydrorefining and hydrocracking are used in series, the refining and cracking hydrogen circulation systems are connected in parallel, and new hydrogen is added from the cracking section to treat anthracene oil.

[0034] Process flow diagram as figure 1 Shown: the anthracene oil is diluted with hot low fraction oil, pressurized, heated and mixed with inlet hydrogen, and then enters the hydrofining reactor 1; the hot low fraction oil used for dilution can be pre-stored hot low fraction oil or the first The stored hot low-separation oil generated by the first start-up, after the cycle is started, the hot low-separation oil is refined hot low-separation oil.

[0035]The hydrofinishing product from the bottom of the refining reactor enters the hot high-pressure separator 5 after taking heat, and is separated into hot high-fraction steam and hot high-fraction oil. After heat extraction and injection of desalinated water, the hot high-separation ste...

Embodiment 2

[0041] In this example, fixed bed hydrofining and hydrocracking are used in series, and the refining and cracking hydrogen circulation systems are connected in parallel. The difference from Example 1 is that the new hydrogen is supplied by the cracking section and the refining section respectively, and other parts are the same as in Example 1. .

[0042] Among them, the conditions of hydrofining reaction are total pressure of 18MPa, standard volume ratio of hydrogen to oil of 800:1, reaction temperature of 350°C, volume space velocity of 1.0h -1 , The composition and properties of the hydrogenation refining catalyst are: molybdenum oxide 22wt%, nickel oxide 8wt%, and the carrier is alumina. The pore volume of the catalyst is 0.40ml / g, and the specific surface area is 150m 2 / g, the catalyst dosage is 80μg / g.

[0043] The total pressure of the hydrocracking reaction system is 18MPa, the reaction temperature is 260°C, and the reaction space velocity is 1.0h -1 , The standard ...

Embodiment 3

[0045] In this example, fixed-bed hydrofining and hydrocracking are used in series, the refining and cracking hydrogen circulation systems are connected in series, and new hydrogen is added from the refining section to process anthracene oil. The difference from Example 1 is the refining refrigeration of hydrofining The high-fraction gas is used as the circulating hydrogen in the hydrocracking section for hydrocracking reaction without introducing new hydrogen. The cold high-fraction gas in the cracking section is boosted and circulated through the circulating hydrogen compressor, and other parts are the same as in Example 1.

[0046] Among them, the conditions of hydrofining reaction are total pressure of 18MPa, standard volume ratio of hydrogen to oil of 800:1, reaction temperature of 350°C, volume space velocity of 1.0h -1 , The composition and properties of the hydrogenation refining catalyst are: molybdenum oxide 22wt%, nickel oxide 8wt%, and the carrier is alumina. The p...

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Abstract

The invention discloses an anthracene oil hydrogenation method. According to the method, anthracene oil is diluted with hot low-pressure segregator oil, and then the diluted oil and inlet hydrogen are mixed to undergo hydrofining so as to obtain a hydrofining product; the hydrofining product is separated to obtain refined hot low-pressure segregator oil; part of the refined hot low-pressure segregator oil and inlet hydrogen are mixed, and new hydrogen is supplemented to carry out hydrocracking so as to obtain a hydrocracking product; the hydrocracking product is separated to obtain cracked cold high-pressure segregator oil; the cracked cold high-pressure segregator oil and refined cold high-pressure segregator oil are mixed and separation is then carried out to obtain cold low-pressure segregator oil; and the cold low-pressure segregator oil undergoes fractionation so as to obtain a product. by the method of introducing inlet hydrogen in the hydrofining stage and supplementing new hydrogen in the hydrocracking stage, the hydrogen circulatory system and new hydrogen joint point are adjusted, hydrogen purity and hydrogen partial pressure in the hydrogen circulatory system are guaranteed, hydrofining and hydrocracking depth is enhanced, liquid yield of the product is raised, and tail oil quantity is reduced. The method has advantages of simple technological flow, high conversion rate and stable plant operation.

Description

technical field [0001] The invention belongs to the field of anthracene oil hydrogenation technology, and in particular relates to a method for hydrogenation of anthracene oil. Background technique [0002] Coal tar is a by-product formed in the process of coking, gasification and carbonization of coal. It contains a large amount of unsaturated hydrocarbons such as olefins and polycyclic aromatic hydrocarbons, sulfur and nitrogen compounds, and has high acidity and high colloid content. Anthracene oil is a distilled fraction of high-temperature coal tar cut at 280°C to 360°C, and is mainly composed of three- and four-ring aromatic compounds with high melting points such as anthracene, phenanthrene, carbazole, fluoranthracene, and pyrene. For the reprocessing of anthracene oil, it is mainly through concentration, solvent extraction or distillation to extract crude anthracene, phenanthrene, carbazole and other chemical raw materials, or to prepare carbon black raw material oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/1037
Inventor 苏玉更陈松单小勇金毅李斌
Owner HUADIAN HEAVY IND CO LTD
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