A sulfuration starting method for a hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of uneven catalyst vulcanization, catalyst activity damage, increased material consumption, etc., to avoid Emissions and pollution to the environment, increasing the time of intensive vulcanization, and reducing the consumption of reagents

Active Publication Date: 2016-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Various compounds in the starting oil will cause coking of the catalyst
[0008] 2. The end of vulcanization is advanced, the degree of strengthening in the catalyst is weakened, and the degree of initial vulcanization is not sufficient
[0009] 3. Gas, liquid and solid phases exist at the same time, which affects the logistics distribution and causes uneven sulfuration of the catalyst
[0010] 4. The vulcanization and passivation process is carried out at the same time, and the consumption of reagents increases
[0011] 5. Highly active cracking agents and oil products exist at the same time, and the risk of over-temperature increases
[0012] To sum up, in order to adapt to the change of the catalyst type, the start-up mode will increase the material consumption, increase the operation risk, and reduce the catalyst activity. Compared with the

Method used

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  • A sulfuration starting method for a hydrogenation catalyst
  • A sulfuration starting method for a hydrogenation catalyst
  • A sulfuration starting method for a hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0040] like figure 1 As shown, an embodiment of the hydrogenation catalyst start-up method of the present invention is as follows:

[0041] Raise the inlet temperature of the refining reactor 10 to 120-140°C. Sulfur-containing exhaust gas 1 passes through light hydrocarbon absorption tower 2 for light hydrocarbon recovery, absorbing liquid heavy naphtha 4 is injected into the top of the tower, mixed naphtha 5 is discharged from the bottom of the tower to analyze and stabilize the system, and the absorbed gas is injected into the In high pressure separator 6. Then the obtained high-fraction gas is mixed with the new hydrogen 8 through the circulating hydrogen desulfurization tower 7 to obtain the mixed hydrogen 9, which enters the refining reactor 10 and the cracking reactor 11 in turn, and the cracking reactor effluent 12 enters the high-pressure separator 6, so that the gas circulation process is carried out After the hydrogen sulfide concentration is greater than or equal ...

Embodiment 1

[0043] The properties of the catalysts used in Examples 1, 2 and Comparative Examples 1, 2 are listed in Table 1. Among them, Example 1 and Example 2 are the start-up methods of the present invention, Comparative Example 1 is a conventional wet start-up process, and Comparative Example 2 is a conventional gas phase (dry method) start-up process, wherein hydrogen sulfide gas is not used for protection.

[0044] Table 1 The main physicochemical properties of the catalyst.

[0045]

[0046] Example 1

[0047] After the hydrogen airtightness of the hydrocracking unit is qualified, adjust the inlet pressure of the reaction system to 14.0MPa, start to raise the temperature at 20°C / h, and when it reaches 140°C, pass the mixed exhaust gas into the light hydrocarbon absorption system for absorption, and then start the compression The machine injects the gas after absorbing light hydrocarbons into the high fraction, and then enters the reaction system through the compressor. After ...

Embodiment 2

[0049] After the hydrogen airtightness of the hydrocracking unit is qualified, adjust the inlet pressure of the reaction system to 14.0MPa, start to raise the temperature at 20°C / h, and when it reaches 140°C, collect the exhaust gas of the hydrogenation unit containing hydrogen sulfide gas, and then start The compressor injects the collected exhaust gas into the high fraction, and then enters the reaction system through the compressor. After the concentration of hydrogen sulfide at the outlet of the hydrocracking reactor reaches 0.01v%, it is considered that hydrogen sulfide has played a protective role. Then cut off the injection channel of the sulfur-containing gas, adjust the reactor inlet temperature to 180°C, start injecting the vulcanizing agent DMDS, and adjust the catalyst bed temperature to 230°C after the hydrogen sulfide concentration at the outlet of the hydrocracking reactor reaches 0.1v%. Constant temperature for 8 hours, this process maintains the concentration ...

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Abstract

A gaseous starting method for a hydrocracker containing a hydrogenation catalyst with second type active centers is provided. The method utilizes a plurality of hydrogen sulfide containing gases in industrial equipment to pre-protect the catalyst before sulfuration, and a formed gas protective film can completely avoid decomposition of auxiliary agents in the catalyst, thus avoiding problems which are activity loss and increased material consumption in a starting process, saving energy and greatly improving using activity of the catalyst.

Description

technical field [0001] The invention relates to a start-up sulfidation method of a hydrogenation catalyst, especially for a catalyst containing a second type of active center, mainly by using various industrial gases containing hydrogen sulfide to pre-protect the catalyst so that it can be started in a dry process , to achieve the purpose of improving catalyst activity, and is suitable for the sulfuration process of various second-type active center catalysts. Background technique [0002] At present, due to the increasingly heavy crude oil in the world and the strict requirements of environmental protection regulations, the quality of raw materials processed by hydrogenation devices is deteriorating year by year. Various impurities contained in raw materials, including metals, The content of reactants such as sulfur and nitrogen is on the rise. In this harsh environment, catalyst developers in various countries have regarded the renewal and progress of catalyst activity as ...

Claims

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Application Information

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IPC IPC(8): C10G45/04B01J37/20
Inventor 王仲义彭冲崔哲孙士可黄新露吴子明
Owner CHINA PETROLEUM & CHEM CORP
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