A method for improving selectivity of selective hydrodesulfurization catalyst

A hydrodesulfurization and selective technology, applied in the treatment of hydrocarbon oil, petroleum industry, refined hydrocarbon oil, etc., can solve the problems of reducing the desulfurization activity of the catalyst, shortening the operation cycle of the device, and long processing time, so as to achieve easy implementation and high product quality. Low octane loss and low olefin saturation

Active Publication Date: 2019-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can improve the selectivity of the catalyst, but the treatment process takes a long time, which brings inconvenience to the start-up of the device. In addition, the treatment process also reduces the desulfurization activity of the catalyst and shortens the operation period of the device.

Method used

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  • A method for improving selectivity of selective hydrodesulfurization catalyst
  • A method for improving selectivity of selective hydrodesulfurization catalyst
  • A method for improving selectivity of selective hydrodesulfurization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Using fresh A and B catalysts, the loading volume ratio of A and B catalysts in the reactor is A:B=85:15. The catalysts A and B in the reactor are vulcanized, and after the vulcanization finishes,

[0042] Adjust the gas in the reaction system to be a regulating gas. In the regulating gas, the volume fraction of hydrogen is 95%, and the volume fraction of the sum of hydrogen sulfide and carbon monoxide is 3%. The regulating raw materials are introduced into the reaction system, and the distillation range of the regulating raw materials is 30-200 ℃, where the volume fraction of olefins is 30%, the silicon content is 10μg / g, the volume fraction of aromatics is 18%, and the hydrogen partial pressure is 1.6MPa under the control conditions; the hydrogen-oil ratio is 400Nm 3 / m 3 ;Volume space velocity 4.0h -1 ; After contacting with the catalyst for 70 hours at a reaction temperature of 360°C.

[0043] Then adjust to normal reaction conditions, switch control raw material...

Embodiment 2

[0047] Using fresh C catalyst, the C catalyst in the reactor is vulcanized, after the vulcanization is finished,

[0048] The regulated raw materials are introduced into the reaction system, and under the regulated conditions, the hydrogen partial pressure is 1.6MPa; the hydrogen-oil ratio is 200Nm 3 / m 3 ;Volume space velocity 4.0h -1 Contacting the catalyst for 70 hours at a reaction temperature of 350° C., adjusting the distillation range of the raw material to 30-200° C., wherein the volume fraction of aromatics is 30%, and the silicon content is 50 μg / g.

[0049] Adjust the gas in the reaction system to be a regulating gas. In the regulating gas, the volume fraction of hydrogen is 95%, and the volume fraction of the sum of hydrogen sulfide and carbon monoxide is 0.3%. The regulating raw material is introduced into the reaction system, and the distillation range of the regulating raw material is 30-200 ℃, wherein the volume fraction of olefins is 25%, the silicon content...

Embodiment 3

[0054] Using fresh A and B catalysts, the loading volume ratio of A and B catalysts in the reactor is A:B=85:15. The catalysts A and B in the reactor are vulcanized, and after the vulcanization finishes,

[0055] Adjust the gas in the reaction system to be a regulating gas. In the regulating gas, the volume fraction of hydrogen is 95%, and the volume fraction of the sum of hydrogen sulfide and carbon monoxide is 1.5%. The regulating raw material is introduced into the reaction system, and the distillation range of the regulating raw material is 30-200 ℃, where the volume fraction of olefins is 30%, the silicon content is 3μg / g, the volume fraction of aromatics is 18%, and the hydrogen partial pressure is 1.6MPa under the control conditions; the hydrogen-oil ratio is 400Nm 3 / m 3 ;Volume space velocity 4.0h -1 ; After contacting with the catalyst for 70 hours at a reaction temperature of 360°C.

[0056] Adjust to normal reaction conditions, switch the control raw material to...

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Abstract

A method of improving selectivity of a selective hydrodesulfurization catalyst is provided. A catalyst selectivity regulating step is provided additionally between a sulfidation step and a normal production step. The catalyst selectivity regulating step is a step in which a regulating raw material and the selective hydrodesulfurization catalyst are brought into contact for 24-70 h in a regulating gas atmosphere under regulating reaction conditions. By the method, selectivity of the selective hydrodesulfurization catalyst can be improved. Compared with the prior art, in a situation that the sulfur contents of gasoline products are same, the olefin saturation factor of a product prepared by the method is lower and the octane number loss of a product prepared by the method is lower.

Description

technical field [0001] The invention relates to a method for improving the selectivity of a selective hydrodesulfurization catalyst. Background technique [0002] As we all know, air pollution is a serious environmental problem, and a large number of engine emissions are one of the important causes of air pollution. In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuel, especially the sulfur content. The standards implemented in Beijing and Shanghai require the sulfur content in gasoline to be less than 10 μg / g. [0003] The processing capacity of catalytic cracking in my country accounts for a relatively large proportion of secondary processing, and catalytic cracking gasoline is the main source of commercial gasoline, and other gasoline components are few, and the blending ability is poor. Judging from the various blending components in the gasoline pool, the sulfur in cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/12
CPCC10G45/12C10G2300/1051C10G2300/1055C10G2300/1059C10G2300/202C10G2300/70
Inventor 习远兵张登前高晓冬屈锦华田鹏程褚阳刘锋
Owner CHINA PETROLEUM & CHEM CORP
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