Hydrodesulfurization and dearomatization catalyst and system, preparation method thereof, and method for hydrodesulfurization and dearomatization of diesel oil

A hydrodesulfurization and dearomatization technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrocarbon oil treatment, etc., can solve the problems of catalysts that cannot take into account the effects of desulfurization and dearomatization, and the low proportion of multi-layer stacking activity , to achieve the effect of low aromatics content, low sulfur and aromatics content, and increase the degree of sulfidation

Active Publication Date: 2018-08-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The inventors of the present invention have found that the main reason why the existing hydrodesulfurization and dearomatization catalysts cannot take into account the effects of desulfurization and dearomatization is that the catalyst has a relatively low ratio of sulfidation and multilayer stacking activity

Method used

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Examples

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Effect test

preparation example Construction

[0040] According to the preparation method of the catalyst of the present invention, preferably, the method further includes increasing the temperature at a rate of 1-20°C / h from the temperature corresponding to the highest exothermic peak of the alcohol compound by 20-150 °C is preferably 1-10 °C, more preferably 5-10 °C and is kept constant for 1-15 h, preferably 1-10 hours.

[0041] By adopting a multi-stage sulfuration method, the degree of sulfuration of the metal in the catalyst is increased, so the catalyst has a high number of active centers.

[0042] In order to improve the activity of the catalyst, a special sulfidation step is taken in the present invention. This method can convert more active metals in the oxidized catalyst into a sulfurized state, increase the number of active components, and increase the ratio of the three-layer stacked active phase, so that the catalyst exhibits higher hydrodesulfurization and aromatic hydrocarbon saturation activities.

[0043...

Embodiment 1

[0083] The alcohol compound contained in catalyst A1 is ethylene glycol, the content of cobalt oxide is 3%, and the content of molybdenum oxide is 17%. 2 o 3 Content is 1.5%, P 2 o 5 The content is 6%, and the molar ratio of ethylene glycol to cobalt is 1:1.

[0084] Catalyst B1 contains nickel oxide 3%, molybdenum oxide content is 17%, B 2 o 3 Content is 1.5%, P 2 o 5 The content is 6%, and the molar ratio of ethylene glycol to nickel is 1:1.

[0085] The above-mentioned catalyst is determined by temperature-programmed oxidation experiments, and it can decompose and release CO between 230-300°C and 300-400°C. 2 , and the release temperatures were 260°C and 350°C, respectively.

[0086] Catalyst A1 is packed in the upper bed, catalyst B1 is packed in the lower bed, and the volume ratio of catalyst A1 to catalyst B1 is 1:1.

[0087] The activity evaluation of the catalyst system was carried out on a 20mL high-pressure hydrodesulfurization evaluation device. Before the...

Embodiment 2

[0101] The alcohol contained in the catalyst A2 is glycerol, the content of cobalt oxide is 6%, the content of molybdenum oxide is 25%, the content of MgO is 1.9%, and the molar ratio of glycerol to cobalt is 1.5:1.

[0102] Catalyst B2 contains 6% nickel oxide, 25% molybdenum oxide, 1.9% MgO, and a molar ratio of glycerol to nickel of 1.5:1.

[0103] Catalyst A2 is packed in the upper bed, catalyst B2 is packed in the lower bed, and the volume ratio of catalyst A2 to catalyst B2 is 2:1.

[0104] According to the temperature-programmed oxidation test, the catalysts decompose and release CO at 265°C and 345°C respectively. 2 . The vulcanization conditions and activity test conditions are the same as in Example 1, and the vulcanization program is changed to: heat up to 265°C at a heating rate of 8°C / h and then keep the temperature for 3h, then raise the temperature to 345°C at a heating rate of 5°C / h and keep the temperature constant After 2.5 hours, the temperature was raised...

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Abstract

The invention relates to a hydrogenation desulfurization and dearomatization catalyst, a preparation method thereof, a hydrogenation desulfurization and dearomatization catalyst system, and a diesel hydrogenation desulfurization and dearomatization method. The hydrogenation desulfurization and dearomatization catalyst comprises a carrier and sulfide-state metal active components and trace elements loaded on the carrier. The trace elements are one or more selected from P, F, Si, B and Mg. The metal active components comprise Group VIII and Group VIB metal elements. The catalyst is characterized in that, tested with XPS, the vulcanization degree of the Group VIII metal elements in the catalyst is no lower than 70%, and the vulcanization degree of the Group VIB metal elements in the catalyst is no lower than 70%; and counted with TEM, an active phase ratio of a three-layer stack of the catalyst is no lower than 30%. With the hydrogenation desulfurization and dearomatization catalyst provided by the invention, both the desulfurization effect and the dearomatization effect are taken into account.

Description

technical field [0001] The invention relates to a hydrodesulfurization and dearomatization catalyst, a hydrodesulfurization and dearomatization catalyst system and their application, and a method for using the catalyst system to carry out hydrodesulfurization and dearomatization on diesel oil. Background technique [0002] With the increasingly stringent environmental protection regulations, the quality requirements of diesel oil are becoming more and more stringent, and gradually develop towards ultra-low sulfur content (sulfur content is not higher than 10ppm). On the other hand, the proportion of low-quality crude oil is getting higher and higher, resulting in low-quality and diversified sources of diesel oil, which has caused enormous pressure on today's diesel hydrogenation units. The properties of different diesel hydrogenation raw materials are very different, such as sulfur content, sulfide type, nitrogen content, aromatics content, etc. may be significantly differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J27/049C10G49/04
Inventor 陈文斌龙湘云王轶凡李明丰聂红李大东鞠雪艳
Owner CHINA PETROLEUM & CHEM CORP
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