Method for lowering gasoline sulphur content

A technology of sulfur content and gasoline, applied in the petroleum industry, processing hydrocarbon oil, hydrotreating process, etc., can solve problems such as large energy consumption

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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However, this method will inevitabl

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  • Method for lowering gasoline sulphur content

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Effect test

Embodiment 1

[0066] A catalytically cracked gasoline is used as feedstock F, and its feedstock properties are shown in Table 1. Raw oil F is first cut into light distillate gasoline (distillation range C 5 ~65°C) and heavy distillate gasoline (distillation range 65°C~190°C). Wherein the mass proportion of light distillate gasoline is 25%, and the mass proportion of heavy distillate gasoline is 75%. The light distillate gasoline is sweetened by alkali extraction; the heavy distillate gasoline is subjected to hydrodesulfurization treatment using the technological process in the accompanying drawings of the present invention. The light distillate gasoline after alkali extraction is mixed with the heavy distillate gasoline after hydrodesulfurization to obtain the whole distillate gasoline product.

[0067] The specific reaction conditions of the first reactor, the second reactor and the third reactor and the properties of the whole fraction gasoline product are shown in Table 3. It can be se...

Embodiment 2

[0070] A catalytically cracked gasoline is used as feedstock G, and its feedstock properties are shown in Table 1. Raw oil G is first cut into light distillate gasoline (distillation range C 5 ~58°C) and heavy distillate gasoline (distillation range 58°C~205°C). Among them, the proportion of light distillate gasoline is 25% by weight, and the proportion of heavy distillate gasoline is 75% by weight. The light distillate gasoline is sweetened by alkali extraction; the heavy distillate gasoline is subjected to hydrodesulfurization treatment using the technological process in the accompanying drawings of the present invention. The light distillate gasoline after alkali extraction is mixed with the heavy distillate gasoline after hydrodesulfurization in the product tank to obtain the whole distillate gasoline product.

[0071] The specific reaction conditions of the first reactor, the second reactor and the third reactor and the properties of the whole fraction gasoline product ...

Embodiment 3

[0073] A catalytically cracked gasoline is used as feedstock I, and its feedstock properties are shown in Table 1. Raw oil I is first cut into light distillate gasoline (distillation range C 5 ~60°C) and heavy distillate gasoline (distillation range 60°C~205°C). Among them, the proportion of light distillate gasoline is 24% by weight, and the proportion of heavy distillate gasoline is 76% by weight. The light distillate gasoline is sweetened by alkali extraction; the heavy distillate gasoline is subjected to hydrodesulfurization treatment using the technological process in the accompanying drawings of the present invention. The light distillate gasoline after alkali extraction is mixed with the heavy distillate gasoline after hydrodesulfurization in the product tank to obtain the whole distillate gasoline product.

[0074] The specific reaction conditions of the first reactor, the second reactor and the third reactor and the properties of the whole fraction gasoline product ...

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Abstract

Disclosed is a method for lowering the gasoline sulphur content. Gasoline raw materials are fractionized into light fraction gasoline and heavy fraction gasoline, the light fraction gasoline enters an alkali extraction unit, and refined light fraction gasoline is obtained, after heavy fraction gasoline and hydrogen are mixed, the mixture enters a first hydrogenation reactor, a second hydrogenation reactor and a third hydrogenation reactor in sequence to make contact with a first selective hydrogenation diene removal catalyst and a second selective hydrogenation diene removal catalyst II for reactions, the first selective hydrogenation diene removal catalyst and the second selective hydrogenation diene removal catalyst are subjected to selectivity control treatment respectively, and reaction effluents of the third hydrogenation reactor are separated to obtain hydrogenation heavy fraction gasoline. The refined light fraction gasoline and hydrogenated heavy fraction gasoline are mixed to obtain an ultralow sulfur gasoline product. The method can treat high-sulfur high-olefin catalytic gasoline, the product sulfur content is smaller than 10 microgram/g, octane value losses are small, and the gasoline yield reaches 99% or above.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil, in particular to a method for reducing the sulfur content of gasoline and producing ultra-low sulfur gasoline. Background technique [0002] With the rapid increase of the number of automobiles in our country, the problem of air pollution caused by automobile exhaust emissions is becoming more and more serious. The pollutants emitted by automobile exhaust mainly include SOx and NOx. Such pollutants will not only cause acid rain, but also destroy the ozone layer, and NOx can also cause cancer in the human body, causing great harm to humans and the environment. Sulfur in gasoline can poison automobile exhaust gas purification catalysts, seriously affecting its ability to treat exhaust pollutants. Therefore, countries all over the world have formulated more and more stringent gasoline quality standards to limit the sulfur content in gasoline. The U.S. Environmental Protection Agency requir...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 张登前牛传峰高晓冬习远兵屈锦华褚阳李大东田鹏程
Owner CHINA PETROLEUM & CHEM CORP
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