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Production method for lowering contents of sulfur and alkene in gasoline

A production method and technology for olefin content, which are applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve problems such as difficulty in meeting clean gasoline, make up for the loss of octane number, reduce olefin content, and ensure octane number. Effect

Active Publication Date: 2010-09-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can produce clean gasoline that meets the requirements of Euro IV sulfur indicators, and can recover the octane loss caused by hydrodesulfurization through hydro-upgrading, it is difficult to produce clean gasoline that meets the requirements of Euro V sulfur indicators.

Method used

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  • Production method for lowering contents of sulfur and alkene in gasoline
  • Production method for lowering contents of sulfur and alkene in gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the whole cut FCC gasoline enters the pre-hydrogenation reactor to remove diolefins, it enters the fractionation tower for cutting and fractionation, light gasoline is adsorbed and desulfurized, and heavy gasoline is subjected to selective hydrodesulfurization and then hydrogenated and upgraded. Among them, the selective hydrogenation catalyst used in the prehydrogenation reactor is an industrial agent; the light gasoline adsorption desulfurization reactor chooses a fixed bed reactor, and the adsorption desulfurization agent used is an industrial agent; the selective hydrogenation catalyst used in the heavy gasoline selective hydrodesulfurization reactor The hydrodesulfurization catalyst is an industrial agent; the hydromodification agent used in the hydromodification reactor is an industrial agent. The reaction results are shown in Table 2.

[0026] The data in Table 2 shows that after adsorption and desulfurization of light gasoline, the sulfur content dropped f...

Embodiment 2

[0030] The raw materials, catalysts and reaction process conditions used are the same as in Example 1, the difference is that the hydrogenation upgrading reactor is omitted, heavy gasoline is directly blended with light gasoline adsorption desulfurization product after selective hydrodesulfurization, light gasoline product and heavy gasoline product After reconciliation, the sulfur content is 18.6μg / g, meeting the requirements of Euro IV sulfur index, but the octane number is lost by 2.3 units, and the total liquid yield is 99.9%. The specific reaction results are shown in Table 3.

[0031] Table 3 Example 2 data

[0032]

Embodiment 3

[0034] The raw materials, catalyst and reaction process conditions used are the same as those in Example 1, except that the light gasoline is desulfurized by the traditional alkali-elution desulfurization method. After the light gasoline is desulfurized by alkali, the sulfur content is reduced from 72.0 μg / g to 50.2 μg / g. g. The desulfurization effect is obviously inferior to that of the adsorption desulfurization method. After the light gasoline alkali washing desulfurization product is reconciled with the heavy gasoline product, the sulfur content is 29.5 μg / g, which meets the requirements of the Euro IV sulfur index. The specific reaction results are shown in Table 4.

[0035] Table 4 Example 3 data

[0036]

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Abstract

The invention relates to a production method for lowering the contents of sulfur and alkene in gasoline; alkadiene is firstly removed from the raw material of FCC gasoline by a pre-hydrogenation reactor, then the FCC gasoline enters a fractionating tower and is cut and fractionated into light gasoline and heavy gasoline, the light gasoline is adsorbed and desulfurized, the heavy gasoline enters a selective hydrogenation and desulphurization reactor, selective hydrogenation and desulphurization is carried out on the heavy gasoline, organic sulfide and part of the alkene in the heavy gasoline are removed, then a reaction effluent enters a hydrogenation and modification reactor and is hydrogenized and modified, the content of the alkene is lowered, and the heavy gasoline after being modified and the light gasoline are blended by an adsorption and desulphurization product or the light gasoline is blended by the adsorption and desulphurization product or the treatment of the process flows of adsorption and desulphurization is carried out after the heavy gasoline and the light gasoline are mixed with light gasoline obtained after cutting and fractionation to obtain clean gasoline meeting the standard requirements; and the process flows are flexible and can be flexibly regulated, the utilization of heat is reasonable, the production meets European IV and compromises European V clean gasoline, the selective deep hydrogenation and desulphurization and the alkene content reduction can be achieved, and the aims of reducing the loss of the octane value and having higher liquid yield can also be achieved.

Description

technical field [0001] The invention relates to a production method for reducing sulfur and olefin content in gasoline. Background technique [0002] CN1464033A, introduces a process of aromatization, hydroisomerization, desulfurization and upgrading of catalytic cracking gasoline. The whole fraction or light fraction of catalytic cracking gasoline is used to enter the aromatization, hydroisomerization, desulfurization and upgrading reactor to carry out olefin Aromatization and hydroisomerization desulfurization reactions reduce the olefin and sulfur content in gasoline, and gasoline from the aromatization hydroisomerization desulfurization reforming reactor, if the sulfur content does not meet the requirements, first undergo hydrodesulfurization treatment, and then carry out non-alkali deodorization, and then get gasoline products that meet the requirements. This technology is suitable for processing FCC gasoline with low sulfur content. For FCC gasoline with high sulfur c...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 兰玲邢颖春鞠雅娜门存贵张学军钟海军陈烈杭侯远东孙洪磊葛少辉张振莉刘坤红袁晓亮
Owner PETROCHINA CO LTD
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