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A liquid-phase hydrogenation process and liquid-phase hydrogenation reactor

A liquid-phase hydrogenation and hydrogenation reaction technology, which is used in the petroleum industry, chemical instruments and methods, and hydrocarbon oil treatment, etc., can solve the problems of local hot spots, cannot be removed in time, and affects the service life of catalysts.

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, from the perspective of the liquid-phase hydrogenation reaction process in the prior art, there are mainly the following problems: (1) Hydrodesulfurization by-product H in the reaction process 2 S also has obvious inhibitory effect on hydrodesulfurization reaction, hydrodenitrogenation and hydrodearomatization reaction, and cannot be removed in time during the reaction process, which has an adverse effect on the realization of deep hydrogenation; (2) the raw material oil in the reaction feed The amount of hydrogen that can be dissolved is small. For the hydrogenation reaction process with a slightly larger hydrogen-to-oil ratio, it is far from meeting the needs of hydrogen consumption. A large amount of circulating oil is required for auxiliary dissolution, which greatly reduces the reaction efficiency. , while increasing the volume of the reaction system; (3) The reaction process is uneven, mainly due to the uneven dispersion of hydrogen in the raw oil, which makes the liquid phase hydrogenation reaction process have problems of uneven reaction and local hot spots, which affect the use of catalysts life
In this method, on the one hand, the H 2 S is removed, but the H generated during the reaction 2 S has not been removed in time, and still has a certain inhibitory effect on the hydrodesulfurization reaction; on the other hand, a large amount of solvent or circulating oil is introduced to dissolve hydrogen during the reaction process, which will inevitably increase the volume and complexity of the reaction system, making production Process investment and energy consumption are high

Method used

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  • A liquid-phase hydrogenation process and liquid-phase hydrogenation reactor
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  • A liquid-phase hydrogenation process and liquid-phase hydrogenation reactor

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preparation example Construction

[0045] The preparation method of catalyst B: put 125 g (dry basis 80) of macroporous alumina dry rubber powder in a rolling pan, add 2 g of scallop powder, and spray it to the alumina carrier in the rolling pan under the condition of rotation Spray 80mL containing 21.5g molybdenum trioxide, 21.1g basic cobalt carbonate, 0.6g ethylene glycol, 2.0g citric acid, 20g 10% nitric acid, 0.6g sodium methylene bis-naphthalene sulfonate, 52.7g aluminum sulfate Aqueous solution, after the solution is sprayed, continue to rotate in a rolling pot for 30 minutes, knead, shape, dry at 110°C for 4 hours, and roast at 550°C for 3 hours to obtain catalyst B in oxidation state. The oxidized catalyst B was vulcanized by an in-vehicle vulcanization process. The amount of vulcanizing agent introduced was 120% of the theoretical sulfur demand of the catalyst. The vulcanization process was carried out by temperature programming, and the temperature was raised to 320°C for 10 hours to obtain the finish...

Embodiment 1

[0058] Attached figure 2 In the liquid-phase hydrogenation reactor and the liquid-phase hydrogenation reaction process, the amount of hydrogen in the hydrogen-dissolving raw material oil is 0.116% of the quality of the raw material oil; The amount of hydrogen injected into the micrometer is 0.068% of the mass of the raw oil. The reaction conditions in the hydrogenation reaction section are as follows: the reaction temperature is 240-260°C, the reaction pressure is 3.3MPaG, and the liquid hourly volume space velocity is 4.5h -1 ; The reaction conditions in the air stripping section are as follows: the reaction temperature is 240-260°C, the reaction pressure is 3.5MPaG, and the liquid hourly volume space velocity is 86h -1 . The diameter of the hydrogenation reaction section is 200mm, the height is 3050mm, and the aspect ratio is 12.2:1; the diameter of the horizontal section is 2000mm, the length is 2000mm, and the aspect ratio is 1:1; the diameter of the hydrogenation react...

Embodiment 2

[0060] Attached figure 2 In the liquid-phase hydrogenation reactor and liquid-phase hydrogenation reaction process shown, the amount of hydrogen in the hydrogen-dissolving feedstock oil is 0.100% of the mass of the feedstock oil; the membrane tube microdisperser disperses the hydrogen into 500nm hydrogen bubbles, and The amount of hydrogen injected into the micrometer is 0.08% of the mass of the raw oil, and the hydrogen-oil mixing equipment adopts a membrane tube micro-disperser. The reaction conditions in the hydrogenation reaction section are as follows: the reaction temperature is 240-260°C, the reaction pressure is 3.6MPaG, and the liquid hourly volume space velocity is 4.5h -1 ; The reaction conditions of the air stripping section are as follows: the reaction temperature is 240-260°C, the reaction pressure is 3.0MPaG, and the liquid hourly volume space velocity is 57h -1 The diameter of the hydrogenation reaction section is 500mm, the height is 2.5 meters, and the heig...

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Abstract

The invention discloses a liquid phase hydrogenation process and a liquid phase hydrogenation reactor. The process includes the following content: the hydrogen-dissolving raw material oil enters the hydrogenation reaction section and contacts with the hydrogenation catalyst to undergo a hydrogenation reaction, and the obtained reaction effluent enters the nano / micron hydrogen injection section and mixes with the nano / micron hydrogen dispersed through the ceramic membrane tube , the mixture stream enters the stripping section to contact with the hydrogenation catalyst for hydrogenation reaction, and at the same time, the hydrogen gas transfers the H in the stream 2 S, NH 3 The reaction gas is extracted and discharged through the gas outlet at the top of the arc tube, and the liquid-phase reaction effluent flows out from the reaction outlet. The present invention realizes the continuous efficiency and uniformity of the hydrogenation reaction process by setting a reactor with a special structure. During the reaction process, H 2 S, NH 3 The gas that inhibits the reaction is removed from the reaction system in time, which is conducive to improving the hydrogenation reaction rate and realizing deep hydrogenation.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a liquid phase hydrogenation process and a liquid phase hydrogenation reactor. Background technique [0002] The liquid-phase hydrogenation reactor in the prior art is generally a conventional liquid-phase hydrogenation reactor. The raw material oil hydrogen is first mixed with a static mixer and then enters the hydrogenation reactor for hydrogenation reaction. During the reaction process, hydrogenation and desulfurization By-product H 2 S also has obvious inhibitory effect on hydrodesulfurization, hydrodenitrogenation and hydrodearomatization reactions. There are two main reasons: one is because the H 2 The partial pressure of S can affect the activation energy of the hydrodesulfurization reaction. Taking toluene as an example, when the partial pressure of hydrogen sulfide is 0, the activation energy of the reaction is 16kcal / mol. When H 2 When the partial pressure of S ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04C10G45/06C10G45/08B01J8/02B01J8/06
CPCB01J8/025B01J8/0278B01J8/0292B01J8/06C10G45/04C10G45/06C10G45/08C10G2300/1044C10G2300/1062C10G2300/107C10G2300/202C10G2300/207C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70
Inventor 杨秀娜于淼阮宗琳王昊辰金平
Owner CHINA PETROLEUM & CHEM CORP
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