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Method for producing low-sulfur gasoline

A technology for gasoline and gasoline fractions, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., and can solve problems such as loss of octane number of products

Active Publication Date: 2014-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when traditional catalysts and processes are used for hydrodesulfurization, the large-scale hydrogenation of olefins will cause a large loss of octane number of the product

Method used

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  • Method for producing low-sulfur gasoline
  • Method for producing low-sulfur gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] according to figure 1 The process shown produces low sulfur gasoline.

[0047] The gasoline stock oil feed is mixed stock C, its properties are listed in Table 1, catalyst A is RSE-1, and catalyst B is RSS-1.

[0048] The primary desulfurization reaction conditions are: reaction temperature is 270°C, reaction pressure is 1.6MPa, gasoline feed volume space velocity is 4h -1 , gasoline feed hydrogen oil volume ratio is 400. The properties of the gasoline fraction after hydrodesulfurization are listed in Table 2.

[0049] The secondary desulfurization reaction conditions are: the pressure is 1.3MPa, the average temperature of the catalyst bed below the feed is 220°C, and the mass space velocity of the feed is 3h -1 , The volume ratio of steam (inert gas) to raw oil is 7. The properties of the gasoline products are listed in Table 3.

Embodiment 2

[0051] according to figure 1 The process shown produces low sulfur gasoline.

[0052] The gasoline stock oil feed is mixed raw material H, and its properties are listed in Table 1. Catalyst A is RSE-1, and catalyst B is RSS-1.

[0053] The primary desulfurization reaction conditions are: reaction temperature is 270°C, reaction pressure is 1.6MPa, gasoline feed volume space velocity is 4h -1 , gasoline feed hydrogen oil volume ratio is 400. The properties of the gasoline fraction after hydrodesulfurization are listed in Table 2.

[0054] The secondary desulfurization reaction conditions are: the pressure is 1.3MPa, the average temperature of the catalyst bed below the feed is 220°C, and the mass space velocity of the feed is 3h -1 , The volume ratio of steam (inert gas) to raw oil is 7. The properties of the gasoline products are listed in Table 3.

Embodiment 3

[0056] exist figure 1 The shown process omits the flash tower 8, and produces low-sulfur gasoline according to this process.

[0057] The gasoline raw material oil feed is catalytic cracking full distillate gasoline A, its properties are listed in Table 1, the catalyst A is RSE-1, and the catalyst B is RSS-1.

[0058]The primary desulfurization reaction conditions are: reaction temperature is 270°C, reaction pressure is 1.6MPa, gasoline feed volume space velocity is 4h -1 , gasoline feed hydrogen oil volume ratio is 400. The properties of the gasoline fraction after hydrodesulfurization are listed in Table 2.

[0059] The secondary desulfurization reaction conditions are: the pressure is 1.3MPa, the average temperature of the catalyst bed below the feed is 220°C, and the mass space velocity of the feed is 3h -1 , The volume ratio of steam (inert gas) to raw oil is 7. The properties of the gasoline products are listed in Table 3.

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Abstract

The invention discloses a method for producing low-sulfur gasoline. The method comprises the following steps of: (1) in the presence of hydrogen and a catalyst A, performing primary desulfurization reaction on raw gasoline, and separating to obtain hydrogenated and desulfurized gasoline distillate oil; and (2) in the presence of inert gas and a catalyst B, performing secondary desulfurization reaction on the hydrogenated and desulfurized gasoline distillate oil, and separating to obtain the low-sulfur gasoline. Compared with the prior art, the method has the advantages that: the gasoline produced by the method has low sulfur content and low olefin saturation rate, and the method has high desulfurization selectivity.

Description

technical field [0001] The invention relates to a method for producing low-sulfur gasoline. Background technique [0002] Air pollution is a serious environmental problem, and a large amount of engine emissions is 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. [0003] At present, 90% to 99% of the sulfur in my country's finished gasoline comes from FCC gasoline. Therefore, reducing the sulfur content of FCC gasoline is the key to reducing the sulfur content of finished gasoline. [0004] Hydrogenation pretreatment of catalytic cracking feedstock (pre-hydrogenation) or hydrodesulfurization of catalytic cracked gasoline (post-hydrogenation) are two alternative technical solutions for reducing the sulfur content of catalytic cracking gasoline. Among them, the pretreatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 李明丰褚阳毛俊义刘锋朱玫王奎聂红
Owner CHINA PETROLEUM & CHEM CORP
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