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Method for reducing olefin content of catalytically cracked gasoline

A technology for catalytically cracking gasoline and olefin content, applied in the gasoline field, can solve the problems of reducing the olefin content of light gasoline fractions, unable to react with normal olefins, reducing the olefin content, etc. economic effect

Active Publication Date: 2017-03-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the existing FCC light gasoline etherification technology can react olefins in FCC light gasoline with methanol to generate MTBE and TAME, reduce the content of olefins and increase the RON value of light gasoline fractions by 1-2 units, but methanol can only be combined with FCC light gasoline. C in gasoline 5 and C 6 Isomerized olefins react and cannot react with normal olefins
The light gasoline fraction in FCC gasoline (C 5 +C 6 ) only accounts for about 30%, of which the olefin content is 50-60%, and the isomeric olefins account for about 60% of the olefins. The content is reduced by 12-15 percentage points, which still does not meet the requirements of National VI gasoline for olefin content (15v%)

Method used

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  • Method for reducing olefin content of catalytically cracked gasoline
  • Method for reducing olefin content of catalytically cracked gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and the mass percentage concentration are 37% formaldehyde aqueous solution to join in the slurry bed reactor according to the mass ratio of 6:1, then add account for catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and mass percentage concentration are 37% formaldehyde aqueous solution gross mass 1% strongly acidic styrene series cation exchange resin as catalyst, feed nitrogen, and keep the pressure of nitrogen to be 1.0MPa, control the temperature of slurry bed reactor The temperature is 100°C, the rotation speed is 400r / min, and the reaction time is 6h;

[0029] Next, the product after the above-mentioned reaction for 6 hours is subjected to purification treatment; the purification treatment is specifically: the product after the above-mentioned reaction for 6 hours is subjected to deacidification treatment, formaldehyde removal treatment and rectification dehydration treatment in sequ...

Embodiment 2

[0031] First, catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and mass percent concentration are 85% formaldehyde aqueous solution to join in the slurry bed reactor according to the mass ratio of 10:1, then add account for catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and mass percent concentration are 37% formaldehyde solution gross mass 4% H-Y molecular sieve as catalyzer, feed nitrogen, and keep the pressure of nitrogen to be 0.1MPa; The temperature of control slurry bed reactor is 140 ℃, and the rotating speed is 500r / min, reaction 6h;

[0032] Next, the product after reacting for 6 hours is purified to finally obtain a catalytic cracking (FCC) light gasoline product with reduced olefin content. Among them, the conversion rate of formaldehyde and catalytic cracking (FCC) light gasoline (C 5 +C 6 ) The conversion rate of olefins in the cut is shown in Table 2.

[0033] In this example, the same purification process as in Example 1 is used f...

Embodiment 3

[0035] First, catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and paraformaldehyde are added in the slurry bed reactor according to the mass ratio of 22:1, then add account for catalytic cracking (FCC) light gasoline (C 5 +C 6 ) fraction and 4% H-beta molecular sieve of paraformaldehyde gross mass as catalyst, feed nitrogen, and keep the pressure of nitrogen to be 1.0MPa, the temperature of control slurry bed reactor is 200 ℃, and the rotating speed is 600r / min, reaction 2h;

[0036] Next, the product after reacting for 2 hours is purified to finally obtain a catalytic cracking (FCC) light gasoline product with reduced olefin content. Among them, the conversion rate of formaldehyde and catalytic cracking (FCC) light gasoline (C 5 +C 6 ) The conversion rate of olefins in the cut is shown in Table 2.

[0037] In this example, the same purification process as in Example 1 is used for purification treatment.

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Abstract

The invention relates to a method for reducing the olefin content of catalytically cracked gasoline. The method comprises the following steps: (1) adding C5-C6 fractions of the catalytically cracked gasoline and formaldehyde into a slurry-bed reactor according to a mass ratio, and adding a solid acid catalyst; carrying out a reaction under a protection atmosphere of inert gas; and (2) carrying out deacidification treatment, formaldehyde removing treatment and rectification dehydration treatment on a reaction product obtained by the step (1) to finally obtain a catalytically cracked gasoline product with the reduced olefin content. According to the method for reducing the olefin content of the catalytically cracked gasoline, provided by the invention, the olefin content in the catalytically cracked gasoline can be effectively reduced and the oxygen content of the gasoline is increased, so that the octane number of the gasoline is improved; and the method has the advantages that the cost is saved and the economic benefits are good.

Description

technical field [0001] The invention relates to the technical field of gasoline, in particular to a method for reducing the olefin content of catalytic cracking gasoline. Background technique [0002] According to the statistics of the National Bureau of Statistics, the number of civilian vehicles in my country reached 137 million in 2013, and motor vehicle exhaust pollution caused by a large amount of gasoline consumption is one of the important reasons for inducing some regional air pollution problems. Regarding the control of vehicle exhaust pollution, in addition to improving vehicle performance through advanced technologies such as optimizing engine design and installing exhaust converters, the most effective and direct method is to improve the quality of oil products. [0003] Compared with foreign countries, there is a gap in the quality of motor gasoline in my country; at present, my country uses the GB17930-2013 "Gasoline for Motor (Ⅴ)" standard promulgated on Decem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C10L1/04
CPCC10G3/44C10G3/49C10G3/56C10L1/04C10G2400/02C10G2300/1037Y02P30/20
Inventor 刘晨光商红岩马安姜翠玉徐永强王芳珠夏洋峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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