Method for FCC gasoline proceeding hydrodesulphurization and olefin removal

A gasoline hydrogenation and gasoline technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of large heat release and difficult control, and achieve the effects of improving service life, reducing carbon deposits, and reducing carbon deposits

Active Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It does not solve the problems of a large number of reactions in the vulcanization pro

Method used

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  • Method for FCC gasoline proceeding hydrodesulphurization and olefin removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In Example 1, three different raw materials were selected as sulfurized oil, and the gasoline reforming catalyst was MQ-A.

[0026] The vulcanization conditions and process are:

[0027] Vulcanization conditions

[0028] High partial pressure: 3.4MPa; volumetric space velocity: 2.0h -1 ; Hydrogen oil volume ratio: 400; Circulating hydrogen purity: 70v%; Vulcanized oil: reformed oil; Vulcanized agent: C 2 h 6 S 2 ; Final vulcanization temperature: 340°C.

[0029] The vulcanization process is as follows:

[0030] After the reactor inlet temperature rises to 150°C, start the feed pump, and the volumetric space velocity is 2.0h -1 Feed vulcanized oil into the system, carry out closed circuit circulation of vulcanized oil, and start injecting C into the vulcanized oil at a constant speed 2 h 6 S 2 , C 2 h 6 S 2 The content in vulcanized oil is 4%, and the temperature is constant for 3 hours. Raise the inlet temperature of the reactor to 230° C. at a heating rate...

Embodiment 2

[0032] In Example 2, see Table 3 for the operation results and catalyst carbon deposits after switching to catalytically cracked gasoline with three starting oils. The process conditions are: inlet temperature 340°C, reaction pressure 3.5MPa, liquid hourly volume space velocity 2h -1 , The volume ratio of hydrogen to oil is 400:1.

[0033] Table 3 The reaction results of three kinds of start-up oils after switching to FCC gasoline

[0034] Start oil name

[0035] It can be seen from the reaction results after the three kinds of starting oils are switched to catalytic cracked gasoline that due to the low carbon deposits in the reformed oil, there is little difference in the various indicators of the products after 500-2000 hours; the catalyst carbon deposits of the other two starting oils are high , affecting the activity and stability of the catalyst.

Embodiment 3

[0036] In Example 3, the selective reforming oil produced by the MQ-B and MQ-C catalysts was used as the start-up oil. The vulcanization process was the same as in Example 1, and the process conditions were the same as in Example 2. Table 4 shows the operation results and the amount of carbon deposited on the catalyst.

[0037] Table 4 Reaction results of FCC gasoline treated with MQ-B and MQ-C catalysts

[0038] Start oil name

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Abstract

The invention relates to a work-starting method of FCC gasoline hydrodesulfurization to degrade the alkenes. According to the invention, on the basis of regular wet process thiolaction, it adopts reformed generating oil as the sulfurized oil so as to avoid the extra high temperature in the early starting time, decrease the carbon deposition of the catalyst and increase the stability and activity of the catalyst. The invention can be used in different kinds of gasoline that contains molecular sieve reforming catalyst thiolaction, especially the gasoline that contains high molecular sieve.

Description

technical field [0001] The invention relates to a start-up method of FCC gasoline hydrodesulfurization and olefin reduction technology, in particular to a start-up method of full fraction FCC gasoline hydrodesulfurization and olefin reduction technology. Background technique [0002] In order to reduce the emission of harmful substances in automobile exhaust, countries successively legislated to impose stricter restrictions on sulfur and olefins in gasoline. Around 2005, the sulfur content of gasoline in Europe, the United States and other countries and regions will be reduced to 30-50 μg / g, and even put forward the suggestion of 5-10 μg / g "sulfur-free gasoline"; olefins will be reduced to about 10.0v%. FCC gasoline generally contains more sulfur and contains a large amount of olefins, especially full-cut FCC gasoline. Full-fraction FCC gasoline aromatization to reduce olefins is a new technology for upgrading full-fraction FCC gasoline. It is characterized in that it can g...

Claims

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Application Information

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IPC IPC(8): C10G45/12
Inventor 李扬方向晨刘继华赵乐平王震
Owner CHINA PETROLEUM & CHEM CORP
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