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Double-phase hydrogenating method

An additive and hydrogen technology, applied in the field of hydrocarbon oil hydrogenation, can solve the problems of reducing the mass transfer and reaction speed of fresh feed oil and hydrogen, and achieve the effect of low operating cost, small hydrogen loss, and large operating flexibility.

Inactive Publication Date: 2012-08-15
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above improvements still require circulating hydrogen and circulating hydrogen compressors. US6428686 proposes a two-phase hydrogenation method, which dissolves hydrogen in raw oil before the reactor, cancels circulating hydrogen and circulating hydrogen compressors, and reduces the hydrogenation unit. investment and operating costs, the technology uses the liquid phase circulation of the reaction product to increase the dissolved amount of hydrogen to meet the hydrogen requirements in the hydrogenation process and bring out the heat of reaction. After mixing, it enters the hydrogenation reactor. The disadvantage is that the existence of a large amount of circulating oil will affect the reaction rate of fresh raw materials and hydrogen, because the reaction between fresh raw materials and hydrogen is relatively intense when they start to contact with the catalyst, and the existence of circulating oil inhibits the reaction rate of fresh raw materials. The contact chance of oil and hydrogen with catalyst reduces the mass transfer and reaction rate of fresh raw oil and hydrogen

Method used

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Embodiment Construction

[0074] Such as figure 1 As shown, the reactor shown in the figure is a four-stage catalyst bed. Fresh raw oil 1 is mixed with hydrogen 2 and cycle oil 17 in the first mixer 3 in the presence of part of the solvent or diluent 13, and the mixture flows into the separation tank 4, and the waste gas 14 of the separation tank is separated to become the reactor feed 7, The reactor feed 7 enters the catalyst bed in the first section of the reactor from the top of the reactor 5 to contact and react with the catalyst, and another part of the solvent or diluent 13 is mixed with the hydrogen 2 in the third mixer 10 and discharged from the third mixer exhaust gas 18 , the hydrogen-dissolving solvent or diluent 12 enters the reaction between the first section and the second section catalyst bed, the second section and the third section catalyst bed and the third section and the fourth section catalyst bed of the reactor 5 5, the reaction effluent from the bottom of the reactor 5 enters th...

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Abstract

The invention discloses a double-phase hydrogenating method. In the double-phase hydrogenating method, recycle hydrogen and a recycle hydrogen compressor are omitted, hydrogen is mixed with fresh raw oil and a part of recycle oil under the action of solvent or diluent to form mixture flow, the mixture flow enters a reactor and contacts with catalyst, after the rest recycle oil and the hydrogen gas are mixed to discharge gas, the gas in one channel or branches enters the reactor from catalyst bed layers of the reactor, the solvent or diluent is mixed with hydrogen gas to discharge gas, and the gas in one channel or branches enters the reactor from the catalyst bed layers of the reactor. Reaction effluence is subjected to liquid gas separation, liquid phase is further separated to obtain solvent or diluents for recycling, and a part of separated liquid products is utilized as products and the other part of separated liquid products is utilized as recycle oil.

Description

[0001] This application is the application number: 200810140990.3, the application date is: August 11, 2008, and the name is: a divisional application of a two-phase hydrogenation method technical field [0002] The invention relates to hydrocarbon oil hydrogenation technology, in particular to liquid-solid two-phase hydrocarbon oil hydrogenation technology. Background technique [0003] In hydrocarbon oil processing technology, hydrogenation technology is one of the commonly used technologies to improve the quality of hydrocarbon oil. As the global crude oil market tends to supply crude oil with higher sulfur content, refineries need to process low-quality hydrocarbon oil with higher sulfur content. Impurities such as sulfur, nitrogen, oxygen and metals are removed during the refining process, and the quality of hydrocarbon oil is changed by changing the molecular structure, so that various products meet the specification requirements. In the hydrocarbon oil hydrogenation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/00
Inventor 朱华兴王月霞叶杏园梁龙虎董利萍薛皓张光黎师敬伟胡敏李淑红
Owner CHINA PETROCHEMICAL CORP
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