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Coal tar hydrogenation process and catalyst therefor

A catalyst, coal tar technology, applied in the field of coal chemical industry, can solve the problems of dust pollution, air pollution and so on

Inactive Publication Date: 2008-08-20
上海博申工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the sulfur, nitrogen and other impurities contained in coal will become sulfur and nitrogen oxides during the combustion process and release them into the atmosphere, causing air pollution, and the coal combustion process will also cause dust pollution.

Method used

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  • Coal tar hydrogenation process and catalyst therefor
  • Coal tar hydrogenation process and catalyst therefor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The main properties of by-product coal tar in a gasification plant are shown in Table 3. The fixed bed hydrogenation process and special catalyst are adopted. The main properties of the catalyst are shown in Table 4. The feedstock for hydrogenation is the light fraction of coal tar less than 350°C. The target products are high-quality naphtha and high-quality diesel blending components.

[0024] The distillate above 350°C is used as bitumen to exit the hydrogenation unit. There is no switching protection reactor. Its technological process is shown in Figure 3. The main process parameters of hydrogenation are shown in Table 5. The main properties of the product are shown in Table 6.

[0025] Table 3 Properties of coal tar

[0026] Fraction range

whole distillate

Less than 350℃ coal tar light

distillate

Density (20℃), g / m 3

0.98

0.93

Carbon residue, m%

4.0

2.5

Elemental composition, m%

...

Embodiment 2

[0034] The main properties of by-product coal tar in a gasification plant are shown in Table 3. Ebullated bed technology and special catalyst are adopted. The main properties of the catalyst are shown in Table 7. The feedstock for hydrogenation is full-fraction coal tar, and the target products are high-quality naphtha and high-quality diesel oil. The fraction of unconverted oil above 350°C is sent out of the hydrogenation unit as needle coke raw material or recycled into the hydrogenation reactor. Set up a switching protection reactor. Its technological process is shown in Figure 4. The main process parameters of hydrogenation are shown in Table 8. The main properties of the product are shown in Table 9.

[0035] Table 7 Main Properties of Catalysts

[0036] name

Coal tar hydrogenation pre-refining catalyst

Coal tar hydrogenation upgrading catalyst

Chemical composition, % (mass)

MoO 3

5.0-9.0

10.0-11.0

WO 3

/ ...

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Abstract

The present invention, coal tar hydrogenating process and catalyst, has obvious economic and environment protecting significance. Different hydrogenating catalysts are developed for meeting the requirement of hydrogenating coal tar of different components. The hydrogenating reactor has inlet pressure not higher than 15.0 MPa. After coal tar is hydrogenated in proper process to modify, may be obtained high-quality naphtha, high-quality diesel oil component or diesel oil, high-quality needle coke material and high-purity chemical product. The key point of the present invention is to use the developed special hydrogenating refining and modifying catalyst in hydrogenating coal tar.

Description

technical field [0001] This patent belongs to the field of coal chemical industry and relates to a novel coal tar hydrogenation process and catalyst. The reasonable utilization of coal tar is of great significance especially to environmental protection. Its essence is based on the hydrogenation process of petroleum refining, through the development of engineering technology, and the research of special catalysts, to realize the desulfurization and denitrification of coal tar and other environmentally polluting components to produce environmentally friendly fuels or petrochemical raw materials. Background technique [0002] Coal tar is one of the products of coal dry distillation and coal gas production. In the 1950s and 1960s, the deep processing of coal tar, especially the hydrogenation method, attracted much attention and invested a lot of money and manpower in research. Due to the discovery and exploitation of underground oil in Daqing, Xinjiang and other places in my c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/00
Inventor 张明会王守峰吕子胜牟湘鲁
Owner 上海博申工程技术有限公司
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