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Catalytic conversion method for reducing benzene content in gasoline

A catalytic conversion method and a technology of benzene content, which are applied in the field of catalytic conversion to reduce the benzene content of gasoline, can solve the problems of increased equipment investment, reduced gasoline yield, complicated separation process, etc., and achieve increased gasoline yield, improved gasoline quality, gasoline The effect of octane number improvement

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the benzene content can be reduced by using the alkylation benzene reduction technology route, it is often necessary to introduce high-value low-carbon olefins such as ethylene and propylene, the subsequent separation process is complicated, and the equipment investment increases. , easy to generate fractions above C12, reducing gasoline yield

Method used

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  • Catalytic conversion method for reducing benzene content in gasoline
  • Catalytic conversion method for reducing benzene content in gasoline
  • Catalytic conversion method for reducing benzene content in gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This example illustrates the use of the method provided by the present invention.

[0038] use figure 1 In the shown process, the benzene-containing gasoline A listed in Table 1 is used as the reaction raw material, methanol (Beijing Chemical Plant, purity ≥ 99.5%) is used as the alkylating agent, and Y-type molecular sieves (catalyst a in Table 2 for properties) are used as the reaction material. Catalyst, the catalytic conversion reaction of gasoline and methanol is carried out in a small fluidized bed reactor to produce low-benzene gasoline.

[0039] The mixture of benzene-containing gasoline A and methanol and preheated high-temperature steam are mixed into the fluidized bed reactor. At a reaction temperature of 400°C, the weight ratio of catalyst to total liquid feed is 15, methanol and benzene-containing gasoline The weight ratio is 0.25:1, and the space velocity is 10h -1 , under the condition that the water injection amount (accounting for the total liquid fee...

Embodiment 2

[0042] use figure 1 Shown technique, with the listed benzene-containing gasoline B of table 1 as reaction raw material, methyl alcohol (Beijing Chemical Plant, purity ≥ 99.5%) is used as alkylating agent, uses ZSM-5 type molecular sieve (property sees catalyst b in table 2 ) as a catalyst, the catalytic conversion reaction of gasoline and methanol is carried out in a small fluidized bed reactor to produce low-benzene gasoline.

[0043] The mixture of benzene-containing gasoline B and methanol and preheated high-temperature steam are mixed into the fluidized bed reactor. At a reaction temperature of 300°C, the weight ratio of the catalyst to the total liquid feed is 6, methanol and benzene-containing gasoline The weight ratio is 0.20:1, and the weight hourly space velocity of the total liquid feed is 8h -1 , under the condition of 10% by weight of water injection (accounting for the total liquid feed amount), contact with the catalyst to carry out catalytic conversion to prepa...

Embodiment 3

[0046] use figure 1 In the shown technique, the gasoline C containing benzene listed in Table 1 is used as the reaction raw material, methanol (Beijing Chemical Plant, purity ≥ 99.5%) is used as the alkylating agent, and ZSM-5 type molecular sieves are used (see catalyst b in Table 2 for properties). ) as a catalyst, the catalytic conversion reaction of gasoline and methanol is carried out in a small fluidized bed reactor to produce low-benzene gasoline.

[0047] The mixture of benzene-containing gasoline C and methanol and preheated high-temperature steam are mixed into the fluidized bed reactor. At a reaction temperature of 500°C, the weight ratio of catalyst to total liquid feed is 6, methanol and benzene-containing gasoline The weight ratio is 0.125:1, and the weight hourly space velocity of the total liquid feed is 8h -1 , under the condition of 10% water injection (accounting for the total liquid feed), contact with the catalyst to carry out catalytic conversion to prep...

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Abstract

A catalytic conversion method for reducing benzene content in gasoline comprises steps as follows: in a fluidized bed and / or riser reactor, allowing benzene-containing gasoline to be contacted with catalytic cracking catalyst to separate out the gasoline with reduced benzene content, wherein the catalytic cracking catalyst contains zeolite and heat resistant inorganic oxide, and the zeolite is mesoporous and / or macroporous zeolite. When the benzene-containing gasoline is treated with the method provided by the invention, the benzene content in the gasoline can be reduced by more than 60% (v / v); since benzene reacts with alcohol to be converted to gasoline fraction, the gasoline yield is increased; and since benzene reacts with alcohol to be converted to aromatic hydrocarbon, the gasoline octane number is improved.

Description

technical field [0001] The invention relates to a catalytic conversion method for reducing benzene content in gasoline. Background technique [0002] As an important part of the comprehensive control of motor vehicle exhaust pollution, reducing the sulfur content of gasoline, improving the content of aromatics and olefins in gasoline, and continuously improving the quality of gasoline are urgent tasks for the petrochemical industry, especially benzene in gasoline is a carcinogen , in gasoline, it will cause serious pollution to the atmosphere through evaporation and incomplete combustion. Countries all over the world have strict restrictions on the content of benzene in gasoline. The World Fuel Specification Class II specification indicators, the Euro III standard implemented in 2000 in Europe, and the Euro IV standard implemented in 2005 require the upper limit of the benzene content in motor gasoline to be 1.0% by volume. The U.S. Environmental Protection Agency further p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/18C10G3/00
CPCY02P20/52Y02P30/20
Inventor 魏晓丽李正谢朝钢龚剑洪龙军张久顺
Owner CHINA PETROLEUM & CHEM CORP
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