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Method for reducing olefin sulfur content in gasoline

A technology of sulfur content and gasoline, applied in the petroleum industry, processing hydrocarbon oil, hydrotreating process, etc., can solve problems such as difficulty in meeting the requirements of gasoline quality, decrease in gasoline octane number, etc., and achieve no loss of gasoline octane number. , The effect of reducing total hydrogen consumption and high liquid yield

Inactive Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] Hydrogenation technology can reduce the content of olefins and sulfur in gasoline. However, olefins in gasoline are high-octane components. Using hydrogenation technology to saturate olefins will lead to a decrease in the octane number of gasoline. Hydrogen technology is difficult to meet the requirements for gasoline quality

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  • Method for reducing olefin sulfur content in gasoline

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Embodiment

[0035] This example gives the reaction conditions and reaction results of a medium-scale test of 100,000 tons / year of catalytic cracking gasoline heavy fraction. In this embodiment, the front hydrogenation reaction system and the rear dehydrogenation reaction system each have an independent hydrogen circulation system.

[0036] The research method of the whole distillate raw material of catalytic cracking gasoline has an octane number of 90.5, an olefin content of 50.3v%, a sulfur content of 130ppm, and a flow rate of 18657kg / h.

[0037] 1. Cutting of gasoline whole distillate raw materials

[0038] The light and heavy fraction cut point is 73°C, and the cut ratio is: light fraction 33.0% by weight, heavy fraction 67.0% by weight, then the flow rate of light fraction is 6157kg / h, and the flow rate of heavy fraction is 12500kg / h.

[0039] 2. Alkali washing treatment of light gasoline fraction

[0040] The sulfur content of the light gasoline fraction is 59ppm, and the mercapt...

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Abstract

The process of lowering the olefin and sulfur contents in gasoline includes separating gasoline fractions into light fraction and heavy fraction, alkaline washing the light fraction, hydrogenating the heavy fraction to saturate its olefin while desulfurizing and denitrogenating, dehydrogenating, and finally mixing the treated light and heavy fractions to obtain gasoline product with relatively low olefin and sulfur contents and relatively high octane number. The said process can lower the the olefin and sulfur contents of gasoline while losing no octane number of gasoline and has high liquid yield. Hydrogen produced in the dehydrogenation may be used in hydrogenation to lower the total hydrogen consumption of the whole gasoline hydrogenating process.

Description

technical field [0001] The invention relates to a method for upgrading gasoline, more specifically, a method for reducing the content of olefins and sulfur in gasoline. Background technique [0002] With the increasingly stringent environmental protection regulations, higher requirements are put forward for the sulfur content and olefin content of gasoline products. The composition of gasoline in China is quite different from that in the international market. The gasoline in China is dominated by catalytic cracking gasoline. Petroleum production has just started. Due to the high content of olefins and sulfur in FCC gasoline, only by effectively reducing the content of olefins and sulfur in gasoline can the requirements of environmental protection be met. The gasoline national standard currently implemented in my country requires gasoline sulfur content to be less than 800ppm and olefin content to be less than 35v%. By 2003 and 2006, the gasoline supplied to the three major...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/10
Inventor 赵志海师峰金欣付锦晖石亚华
Owner CHINA PETROLEUM & CHEM CORP
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