A method for producing ultra-low sulfur full distillate gasoline products

A full fraction, ultra-low sulfur technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of large octane loss and low yield, and achieve low octane loss and olefin content The effect of reducing and reducing the loss of octane number

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly applicable to relatively heavy catalytic cracking gasoline fractions. If the whole fraction gasoline with an initial boiling point of about 35°C is processed, the octane number loss of the product will be large, or when the octane number loss is small. 5 + The yield is too low (only about 80% by volume)

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  • A method for producing ultra-low sulfur full distillate gasoline products
  • A method for producing ultra-low sulfur full distillate gasoline products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this example, the same raw material oil A as that in Comparative Example 1 was used, and the raw material oil A was cut into three fractions at 60°C and 135°C as cut points, and the obtained light gasoline fraction, intermediate gasoline fraction and heavy gasoline fraction accounted for 30.0% of the raw material respectively. % by weight, 35.0% by weight and 35.0% by weight. The distillate of light gasoline is refined by alkali washing to remove mercaptan sulfur. The middle gasoline fraction is mixed with hydrogen and enters the fixed bed reactor for hydrofining reaction, and then sent to catalytic reforming treatment. The heavy gasoline fraction is mixed with hydrogen and then enters two hydrotreating reactors for selective hydrodediene, selective hydrodesulfurization, and then oxidative sweetening. The products of the above-mentioned three-stage gasoline fractions are blended to obtain full fraction gasoline products.

[0052] The hydrogenation reaction conditio...

Embodiment 2

[0054] A catalytically cracked gasoline is used as feedstock B, and its feedstock properties are shown in Table 1. The feed oil B was cut into three fractions at 65°C and 150°C as cut points, and the obtained light gasoline fraction, middle gasoline fraction and heavy gasoline fraction accounted for 33.0 wt%, 37.0 wt% and 30.0 wt% of the raw material respectively. The distillate of light gasoline is refined by alkali washing to remove mercaptan sulfur. The middle gasoline fraction is mixed with hydrogen and enters the fixed bed reactor for hydrofining reaction, and then sent to catalytic reforming treatment. The heavy gasoline fraction is mixed with hydrogen and then enters two hydrotreating reactors for selective hydrodediene, selective hydrodesulfurization, and then oxidative sweetening. The products of the above-mentioned three-stage gasoline fractions are blended to obtain full fraction gasoline products.

[0055]The hydrogenation reaction conditions of the middle gasoli...

Embodiment 3

[0057] A catalytically cracked gasoline is used as feedstock C, and its feedstock properties are shown in Table 1. The raw material oil C was cut into three fractions at 80°C and 160°C as cut points, and the obtained light gasoline fraction, middle gasoline fraction and heavy gasoline fraction accounted for 40.0 wt%, 40.0 wt% and 20.0 wt% of the raw material respectively. The light gasoline fraction is refined by alkali washing to remove mercaptan sulfur. The middle gasoline fraction is mixed with hydrogen and enters the fixed bed reactor for hydrofining reaction, and then sent to catalytic reforming treatment. The heavy gasoline fraction is mixed with hydrogen and then enters two hydrotreating reactors for selective hydrodediene, selective hydrodesulfurization, and then oxidative sweetening. The products of the above-mentioned three-stage gasoline fractions are blended to obtain full fraction gasoline products.

[0058] The hydrogenation reaction conditions of the middle ga...

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Abstract

The invention provides a production method for a full-fraction gasoline product with ultralow sulfur. Full-fraction gasoline is fractionated into a light gasoline fraction, a medium gasoline fraction and a heavy gasoline fraction; the light gasoline fraction is subjected to alkali washing and refining so as to remove mercaptan sulfur therein; the medium gasoline fraction enters into a first hydrogenation unit and undergoes catalytic reforming so as to obtain a reformed medium gasoline fraction with an improved octane number; the heavy gasoline fraction enters into a second hydrogenation unit, successively enters into two hydrotreatment reaction zones and respectively undergoes selective hydrogenation for removal of diene and selective hydrodesulfurization so as to obtain a hydrogenated heavy gasoline fraction, and the hydrogenated heavy gasoline fraction undergoes oxidation for removal of mercaptan sulfur so as to obtain a low-sulfur heavy gasoline fraction. The refined light gasoline fraction, the reformed medium gasoline fraction and the low-sulfur heavy gasoline fraction are mixed so as to obtain the full-fraction gasoline product with ultralow sulfur. The obtained full-fraction gasoline product has total sulfur content of less than 10 mu g / g; and compare with a full-fraction gasoline raw material, loss of the octane number RON of the full-fraction gasoline product is less than 1.0 unit.

Description

technical field [0001] The invention relates to a method for reducing the sulfur content of gasoline, in particular to a method for reducing the sulfur content of catalytic cracking gasoline and producing ultra-low sulfur gasoline. Background technique [0002] With the enhancement of human environmental protection awareness, people pay more and more attention to the pollution of atmospheric environment caused by harmful substances in automobile exhaust. Countries all over the world have put forward increasingly strict restrictions on the composition of engine fuel, especially the sulfur content. The European Union began to implement Euro IV vehicle exhaust emission standards in 2005, requiring gasoline sulfur content to be less than 50 μg / g, and implemented Euro V emission standards on September 1, 2009, requiring gasoline sulfur content to be less than 10 μg / g, and plans to implement in 2014 Around the implementation of more stringent Euro VI standards; China implemented t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
Inventor 屈锦华高晓冬习远兵戴立顺李明丰聂红褚阳卫剑
Owner CHINA PETROLEUM & CHEM CORP
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