Catalytic conversion method for reducing benzene content in gasoline

A catalytic conversion method and technology of benzene content, applied in the field of catalytic conversion to reduce the benzene content of gasoline

Active Publication Date: 2012-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method does not give the hydrogenation rate of benzene

Method used

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  • Catalytic conversion method for reducing benzene content in gasoline

Examples

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Effect test

Embodiment 1

[0037] This example illustrates the situation of producing low-benzene gasoline by catalytic conversion and alkylation in a small fluidized bed reactor using the method provided by the present invention.

[0038] The gasoline raw material A listed in Table 1 was used as the raw material for catalytic cracking, and the above-mentioned catalyst was used to carry out the test of catalytic conversion and alkylation to produce low-benzene gasoline in a small fluidized bed reactor operated by continuous reaction regeneration.

[0039] Gasoline raw material A, small molecule olefin-containing gas and preheated high-temperature steam are mixed into the fluidized bed reactor. The reaction temperature is 300°C, the reactor pressure is 0.6 MPa, the weight ratio of the catalyst to the gasoline raw material is 20, and the gasoline The weight hourly space velocity of the raw material is 6 hours -1 , the ratio of agent to oil is 20, with catalytic cracking dry gas (containing ethylene 15% vo...

Embodiment 2

[0042] Feed oil B is contacted with catalyst in a small continuous fluidized bed reactor for catalytic conversion and alkylation. The main operating conditions are: the reaction temperature is 350°C, the reactor pressure is 0.5 MPa, the weight ratio of the catalyst to the gasoline feedstock is 15, the weight hourly space velocity of the gasoline feedstock is 5 hours-1, and the catalyst-to-oil ratio is 15. Liquefied gas (containing 35% vol of propylene) is used as a small molecule olefin donor, the weight ratio of the gasoline raw material to the liquefied gas is 10:1, and the water injection amount (accounting for the raw material) is 15% by weight. The alkylation product obtained from the top of the reactor is cooled and separated to obtain gaseous products and liquid products. The regeneration temperature of the catalyst is 550°C, and the regenerated catalyst is cooled and returned to the reactor for recycling. The test conditions, product distribution and main properties o...

Embodiment 3

[0044] Feed oil C is contacted with a catalyst in a small continuous fluidized bed reactor for catalytic conversion and alkylation. The main operating conditions are: the reaction temperature is 450°C, the reactor pressure is 0.3 MPa, the weight ratio of the catalyst to the gasoline feedstock is 8, and the weight hourly space velocity of the gasoline feedstock is 20 hours -1 , the ratio of agent to oil is 8, with catalytic cracking dry gas (containing ethylene 15% vol) as the small molecule olefin donor, the weight ratio of the gasoline raw material to the dry gas is 14:1, and the water injection amount (accounting for raw material) is 10% by weight. The alkylation product obtained from the top of the reactor is cooled and separated to obtain gaseous products and liquid products. The regeneration temperature of the catalyst is 600°C, and the regenerated catalyst is cooled and returned to the reactor for recycling. The test conditions, product distribution and main properties ...

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Abstract

The invention provides a catalysis conversion method used for reducing the content of gasoline benzene; the gasoline raw material and gases containing small molecule alkene contact normal catalytic cracking catalyst, so as to carry out the alkylation reaction inside a fluidized bed reactor under the conditions of 250-550 DEG C of temperature, 2-100h<-1> of weight hourly space velocity, 0.1-1.0MPaof pressure, 1-30 of weight ratio of catalyst to gasoline raw material, 2-30 of gasoline raw material to small molecule alkene and 0.05-1.0 of weight ratio of water vapour to raw material; the materials after reaction are separated, and the reaction outcome is sent to a subsequent separation system for outcome separation so as to gain the object outcome; the catalyst after reaction is regenerated after being stripped and burned; the regenerated catalyst is returned to a reactor after being cooled for recycling. The method reduces the volume content of the benzene in the gasoline raw material by more than 50% and improves the octane and yield of the gasoline.

Description

technical field [0001] The invention belongs to the catalytic conversion method of hydrocarbon oil in the absence of hydrogen, more specifically, it is a catalytic conversion method for reducing the benzene content of gasoline. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on benzene content in gasoline are becoming more and more stringent. Worldwide, the volume fraction limit of benzene in Euro III and Euro IV standards is usually 1.0%, and it is expected that the requirement for benzene in fuel standards in 2010 will tend to be less than 1.0%. The U.S. Environmental Protection Agency proposed a new specification to limit the benzene content in gasoline in the second phase of the Automobile Emissions Atmospheric Toxic Substances Regulations (MSAT), which will control the benzene content in U.S. gasoline to a lower level than the currently used reformulated gasoline (RFG), The new regulations consider reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G63/04
Inventor 崔守业许友好刘宪龙杨轶男刘守军
Owner CHINA PETROLEUM & CHEM CORP
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