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Coal tar hydrogenation method

A process method and coal tar technology are applied in the field of prolonging the life of a coal tar hydrogenation catalyst, which can solve problems such as difficult treatment, and achieve the effects of difficult treatment, simple and easy method, and high catalytic activity.

Inactive Publication Date: 2013-01-30
陕西双翼石油化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Paraffin wax products have few impurities (sulfur, nitrogen, metals, etc.), while raw coal tar contains a large amount of impurities such as water, solid impurities, and metal salts, making it difficult to process

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Coal tar was processed on a continuous hydrogenation test device equipped with 0.5L industrial heavy oil hydrogenation catalyst. The catalyst used is the RHT series hydrogenation catalyst developed by the Beijing Institute of Petroleum Science. The coal tar raw material used in the test comes from the medium-temperature coal tar in northern Shaanxi. Its properties are shown in Table 1. The catalyst type, physical and chemical properties and the loading amount of each catalyst are shown in Table 1. 2. This device adopts the pre-vulcanization technology in the wet in-situ device. The specific vulcanization operating conditions and vulcanization temperature rise are shown in Table 3 and Table 4. The device is at an airspeed of 0.5h -1 , the reaction pressure is 14MPa, the hydrogen oil ratio is 1200:1, the protective agent bed temperature is 300°C, the metal removal agent bed temperature is 350°C, the desulfurization agent bed temperature is 360°C, and the denitrification ...

Embodiment 2

[0037] Raw materials, catalyst and process conditions are consistent with embodiment 1, but continuously inject sulfidation agent CS to the catalyst bed of the device during operation 2 , control the hydrogen sulfide concentration in the circulating hydrogen to 0.07%. The change curve of sulfur and nitrogen content in the product oil with time is shown in image 3 , 4 .

[0038] Depend on image 3 , 4 It can be seen that, and compared with the situation of Example 1 (no sulfur supplementation), sulfur supplementation is continuously added to the reactor during the hydrogenation process, and the hydrogenation product will maintain a high desulfurization rate and denitrification rate within 3000h. Moreover, with the prolongation of time, the sulfur and nitrogen content in the product oil fluctuated less, indicating that sulfur supplementation played a great role in maintaining the activity of the catalyst.

Embodiment 3

[0040] Coal tar was treated on a continuous hydrogenation test device equipped with a 0.5L industrial heavy oil hydrogenation catalyst. The catalyst used was from the FZC series hydrogenation catalyst developed by Fushun Research Institute of Catalysts. The raw material of coal tar for the test came from medium-temperature coal tar in northern Shaanxi. See Table 1 for its properties, and Table 5 for the model and physical and chemical properties of the catalyst and the loading amount of each catalyst. The device is at an airspeed of 0.5h -1 , reaction pressure 14.5MPa, hydrogen-oil ratio 1000:1, protective agent bed temperature 290°C, demetallization agent bed temperature 350°C, desulfurization agent bed temperature 360°C, denitrification agent bed temperature 370°C under the conditions of continuous After running for 3000 hours, the change curve of sulfur and nitrogen content in product oil with time is shown in Figure 5 , 6 .

[0041]

[0042] from Figure 5 , 6 It ...

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Abstract

The invention discloses a method for prolonging the coal tar hydrogenation catalyst life by continuously adding sulfur, characterized in that: in the operation process of coal tar hydrogenation, the addition of a vulcanizing agent is controlled by taking H2S volume content which is 0.05-0.1% in recycle hydrogen as the indicators, by continuously on-line adding sulfur, the hydrogenation impurity removal rate and product quality can be maintained without shutting down the device, the catalyst activity is kept, thus the operation period of the catalyst is prolonged.

Description

technical field [0001] The invention relates to a coal tar hydrogenation process method, in particular to a method for prolonging the service life of a coal tar hydrogenation catalyst. Background technique [0002] my country has abundant coal reserves, and promoting the development of coal-based diversified energy sources has become an important means for my country to adjust and optimize its energy structure. Among them, the production of gasoline and diesel by hydrogenation and upgrading of coal tar produced by coal pyrolysis, coking or gasification can not only effectively alleviate the energy situation of shortage of petroleum resources, but also fully improve the comprehensive utilization value of coal tar and solve the problem of Problems such as environmental pollution caused by low-value utilization of coal tar. [0003] Coal tar hydrogenation technology is to remove sulfur, nitrogen and other components that pollute the environment in coal tar through hydrogenatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/18
Inventor 李冬李稳宏雷宝刚刘庆超李振龙
Owner 陕西双翼石油化工有限责任公司
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