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Gasoline deep desulfurization method and equipment for gasoline deep desulfurization

A deep desulfurization and gasoline technology, applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of reduced extraction of sulfide, unfavorable hydrogenation unit, and many impurities, and achieve the effect of avoiding large losses

Active Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conventional liquid-liquid solvent extraction usually has low desulfurization efficiency, and absorbs more non-sulfide hydrocarbons, which need to be washed and separated later, and the separated sulfur-containing materials also carry more impurities, which is not conducive to transportation. In particular, the recovered solvent is often incompletely regenerated, resulting in a decline in the ability to extract sulfides when the solvent is recycled.

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  • Gasoline deep desulfurization method and equipment for gasoline deep desulfurization
  • Gasoline deep desulfurization method and equipment for gasoline deep desulfurization
  • Gasoline deep desulfurization method and equipment for gasoline deep desulfurization

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preparation example Construction

[0107] In the present invention, there is no special limitation on the preparation method of the adsorbent, and there is no special limitation on the shape of the adsorbent.

[0108] Preferably, the sulfur content in the adsorbed light fraction obtained after the adsorbent adsorption step is ≯10 μg / g.

[0109] Preferably, the method of the present invention further includes: before mixing with the heavy fraction after hydrogenation in step (4), first performing etherification reaction on the sweetened light fraction obtained in step (3), to obtain etherified light fraction; then the etherified light fraction is mixed with the hydrogenated heavy fraction in step (4) to obtain the gasoline product.

[0110] The etherification reaction of the present invention makes it possible to obtain etherified light ends with reduced olefin content and increased octane number.

[0111] The etherification reaction under the preferred circumstances of the present invention is provided below: ...

Embodiment 1

[0180] This embodiment adopts figure 1 The equipment shown in Table 1 performs advanced desulfurization treatment on the gasoline feedstock A.

[0181] Gasoline feedstock A was fractionated at a cut point temperature of 95°C to obtain a yield of 50% by weight of the light fraction and a yield of 50% by weight of the heavy fraction.

[0182] In the solvent extraction system, the fractionated light fraction is subjected to solvent extraction distillation in a solvent extraction distillation tower to obtain the solvent-extracted light fraction and sulfur-containing solvent, and the sulfur-containing solvent is 5% by weight of the total light fraction. Then, in the solvent recovery tower, the sulfur-containing solvent is separated from the sulfide contained therein to obtain the solvent-extracted sulfur-containing material and the recovered solvent from which the sulfide has been removed:

[0183] In the solvent extraction distillation tower: the feed weight ratio of the extracti...

Embodiment 2

[0209] This embodiment adopts figure 2 The equipment shown is for advanced desulfurization of gasoline feedstock E.

[0210] Gasoline Feedstock E was fractionated at a cut point temperature of 120°C to obtain a yield of 60% by weight of the light fraction and a yield of 40% by weight of the heavy fraction.

[0211] In the solvent extraction system, the fractionated light fraction is subjected to solvent extraction distillation in a solvent extraction distillation tower to obtain the light fraction and sulfur-containing solvent after solvent extraction, and the sulfur-containing solvent is 7% by weight of the total amount of the light fraction . The sulfur-containing solvent is then separated from the sulfide contained therein by distillation in a solvent recovery tower to obtain the solvent-extracted sulfur-containing material and the recovered solvent from which the sulfide has been removed:

[0212] In the solvent extraction distillation tower: the feed weight ratio of th...

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Abstract

Relating to the refining field of hydrocarbon materials, the invention discloses a gasoline deep desulfurization method and equipment for gasoline deep desulfurization. The method includes: (1) fractionating a gasoline raw material; (2) contacting a light fraction with an extraction solvent to perform solvent extraction, and then conducting distillation to separate a sulfur-containing solvent andthe sulfide therein; (3) contacting the light fraction left after solvent extraction with lye to perform lye extraction, or contacting the light fraction subjected to solvent extraction with an adsorbent; (4) contacting a heavy fraction with a hydrodesulfurization catalyst to carry out selective hydrodesulfurization reaction, thus obtaining a hydrogenated heavy fraction; and (5) mixing the hydrogenated heavy fraction with the light fraction subjected to lye extraction or the adsorbed light fraction to obtain a gasoline product. The method provided by the invention can acquire a gasoline product with lower sulfur under the premise of avoiding large octane number loss.

Description

technical field [0001] The present invention relates to the refining field of hydrocarbon materials, in particular, to a method for deep desulfurization of gasoline and a device for deep desulfurization of gasoline, and more specifically, to a kind of sulfur-containing gasoline through hydrogenation and non-hydrogenation A combination of deep desulfurization process. Background technique [0002] As we all know, the emission of toxic and harmful substances in automobile exhaust seriously affects the air quality. For this reason, countries all over the world have set stricter and stricter standards for the quality of oil used as engine fuel. From January 1, 2013, my country has implemented No. IV emission standards nationwide, and has implemented No. V emission standards in Beijing, Shanghai and other major cities. No. Ⅳ and No. Ⅴ emission standards respectively stipulate that the sulfur content in motor gasoline shall not exceed 50 μg / g and 10 μg / g. [0003] The sulfur in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/202C10G2300/305C10G2400/02
Inventor 潘光成常春艳李涛唐文成习远兵赵丽萍田龙胜褚阳李明丰胡志海
Owner CHINA PETROLEUM & CHEM CORP
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