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Method for producing clean gasoline

A gasoline and clean technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problem of large octane loss and achieve low octane loss, good adaptability, and multi-operation flexibility Effect

Active Publication Date: 2008-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the FCC gasoline hydrotreating technology developed abroad has good results only for the treatment of raw materials with low olefin content. It is used to treat the FCC gasoline with high olefin content in my country, and the octane number loss is relatively large.

Method used

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  • Method for producing clean gasoline

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specific Embodiment approach

[0014] By the above composition of my country's gasoline pool, in-depth analysis and understanding of the group composition, olefin and sulfur-containing compound distribution of FCC gasoline, the specific implementation mode of the present invention is:

[0015] Gasoline raw material and hydrogen enter the tower from the middle of the catalytic distillation tower for fractionation, and fractionate into light and heavy fractions. The fractionated light gasoline fraction passes through the upper catalyst bed of the catalytic distillation tower together with hydrogen, and is carried out under the action of a hydrofining catalyst. Hydrodemercaptan reaction to obtain hydrogenated light gasoline fraction, the reaction conditions of the catalytic distillation tower are: pressure 0.5-3.0MPa, catalyst bed reaction temperature 150-300°C, liquid hourly space velocity 3-10h -1 、Hydrogen oil volume ratio 200~1000Nm 3 / m 3 .

[0016] The heavy gasoline fraction flowing out from the botto...

Embodiment 1

[0044] A catalytically cracked gasoline is used as feedstock A, and its feedstock properties are shown in Table 1. After the raw material oil A is mixed with hydrogen, it enters the tower from the middle of the catalytic distillation tower for fractionation, and the distilled light gasoline fraction passes through the upper catalyst bed of the catalytic distillation tower together with hydrogen, and undergoes hydrodesulfurization under the action of the hydrofining catalyst E Alcohol reaction to obtain a hydrogenated light gasoline fraction; the heavy gasoline fraction flowing out from the bottom of the catalytic distillation tower enters a fixed-bed hydrogenation reactor together with hydrogen, and undergoes hydrogenation under the action of a hydrofinishing catalyst D and an octane recovery catalyst F For reactions such as desulfurization, hydrodenitrogenation, olefin saturation, and octane recovery, the reaction effluent is cooled and separated to obtain a hydrogenated heavy...

Embodiment 2

[0047] A catalytically cracked gasoline is used as feedstock B, and its feedstock properties are shown in Table 1. After the raw material oil B is mixed with hydrogen, it enters the tower from the middle of the catalytic distillation tower for fractionation, and the fractionated light gasoline fraction passes through the upper catalyst bed of the catalytic distillation tower together with hydrogen, and undergoes hydrodesulfurization under the action of the hydrofining catalyst E Alcohol reaction to obtain hydrogenated light gasoline fraction; the heavy gasoline fraction flowing out from the bottom of the catalytic distillation tower enters the fixed bed hydrogenation reactor together with hydrogen, and undergoes hydrodesulfurization and hydrodenitrogenation under the action of hydrogenation reforming catalyst G , olefin saturation and octane number recovery, etc., the reaction effluent is cooled and separated to obtain hydrogenated heavy gasoline fraction; the obtained hydrogen...

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Abstract

A method for producing clean gasoline adopts the following steps: gasoline raw material and hydrogen are fed into a catalytic distillation tower form the middle part of the tower for fractionation; the fractionated light gasoline fraction and hydrogen pass through the catalyst bed arranged at the upper part of the catalytic distillation tower for hydro-sweetening reaction under the action of hydrofining catalyst so as to obtain hydrogenation light gasoline fraction; the heavy gasoline fraction which flows out from the bottom of the catalytic distillation tower and hydrogen are fed into a hydrogenation reactor for hydrodesulfurization reaction, hydrodenitrogenation reaction, alkene saturated reaction and octane number restoration, etc. under the action of hydrogenation catalyst; finally, the produced hydrogenated heavy gasoline fraction and hydrogenated light gasoline fraction are fed into a stabilizer and gasoline product is output from the bottom of the stabilizer. Through adopting the method, clean gasoline with sulphur content and alkene content meeting the Euro IV gasoline emission standard can be obtained along with low octane number loss.

Description

technical field [0001] This invention pertains to a process for the refining of hydrocarbon oils in the presence of hydrogen, and more particularly to a process for the production of clean gasoline. Background technique [0002] As we all know, air pollution brings serious environmental problems, and a large number of engine emissions are one of the important causes of air pollution. In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuel in order to reduce the emission of harmful substances. Among them, the restrictions on sulfur and olefin content in gasoline are more stringent. The United States requires that the sulfur content in gasoline be less than 150 μg / g in 2006, and the European Parliament has passed a decree that also requires that the sulfur content in gasoline is less than 50 μg / g and the olefin content is less than 18 volume percent in 2005. Conformity: On July ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 习远兵胡云剑屈锦华李明丰毛俊义聂红
Owner CHINA PETROLEUM & CHEM CORP
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