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A kind of Fischer-Tropsch synthetic naphtha upgrading method for producing high-octane gasoline

A high-octane gasoline and Fischer-Tropsch synthesis technology, applied in the field of coal chemical industry, can solve the problems of difficult removal of reaction heat, easy carbon deposition on catalysts, and difficult continuous production, etc., so as to reduce the lifting and conveying process, improve the quality, and increase the liquid production. rate effect

Active Publication Date: 2015-12-23
SINOPEC LUOYANG PETROCHEM ENG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for producing high-octane gasoline by upgrading Fischer-Tropsch synthetic naphtha to solve the problem that the reaction heat of raw materials containing high olefins in the prior art is not easy to be taken out, and at the same time, the catalyst is easy to deposit carbon and deactivate quickly , technical problems that are not easy for continuous production

Method used

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  • A kind of Fischer-Tropsch synthetic naphtha upgrading method for producing high-octane gasoline
  • A kind of Fischer-Tropsch synthetic naphtha upgrading method for producing high-octane gasoline
  • A kind of Fischer-Tropsch synthetic naphtha upgrading method for producing high-octane gasoline

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Experimental program
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Effect test

Embodiment 1

[0036] The test raw material is Fischer-Tropsch synthetic naphtha from Lu'an, Shanxi, and the catalyst is ZSM-5 molecular sieve spherical catalyst. The properties of the feedstock fractionation into heavy and light fractions are shown in Tables 1 and 2. The reaction is carried out under non-hydrogen-facing conditions, the inlet temperature of the low-temperature reactor 1 is 310°C, the pressure is 0.25Mpa, and the reaction space velocity is 0.5h -1 ,; The inlet temperature of high temperature reactor 2 is 380℃, the pressure is 0.25Mpa, and the reaction space velocity is 0.4h -1 , The product distribution of the reaction product is shown in Table 3.

[0037] Table 1 Light Distillate Properties

[0038] Distillation range, ℃

＜140℃

Alkanes, mass%

25

Cycloalkane, mass%

0

Olefin, mass%

75

Aromatics, mass%

0

[0039] Table 2 Properties of heavy fractions

[0040] Distillation range, ℃

140-200℃

Al...

Embodiment 2

[0045] The test raw material is Fischer-Tropsch synthetic naphtha from Lu'an, Shanxi, and the catalyst is ZSM-5 molecular sieve spherical catalyst. The properties of the feedstock fractionation into heavy and light fractions are shown in Tables 1 and 2. The reaction is carried out under non-hydrogen-facing conditions, the inlet temperature of the low-temperature reactor 1 is 350°C, the pressure is 0.25Mpa, and the reaction space velocity is 0.6h -1 ; The inlet temperature of the high temperature reactor 2 is 410°C, the pressure is 0.25Mpa, and the reaction space velocity is 0.5h -1 , The product distribution of the reaction product is shown in Table 4.

[0046] Table 4 Example 2 product distribution

[0047]

Embodiment 3

[0049] The test raw material is Fischer-Tropsch synthetic naphtha from Lu'an, Shanxi, and the catalyst is ZSM-5 molecular sieve spherical catalyst. The properties of the feedstock fractionation into heavy and light fractions are shown in Tables 1 and 2. The reaction is carried out under non-hydrogen-facing conditions. The inlet temperature of the low-temperature reactor 1 is 350°C, the pressure is 0.25Mpa, and the reaction space velocity is 0.7h -1 ; The inlet temperature of the high temperature reactor 2 is 420°C, the pressure is 0.25Mpa, and the reaction space velocity is 0.6h -1 , the product distribution of the reaction product is shown in Table 5.

[0050] Table 5 Example 3 product distribution

[0051]

[0052]

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Abstract

Belonging to the field of coal chemical industry, the invention provides a method for reprocessing and utilization of Fischer-Tropsch synthetic naphtha mainly directed at the circumstances of high olefin content and low octane number in Fischer-Tropsch synthetic naphtha. The method includes: firstly, conducting fractionation on deacidified and dehydrated Fischer-Tropsch synthetic naphtha; letting the fractionated heavy fraction enter a low temperature reactor to undergo low temperature aromatization reaction, and isolating rich gas and gasoline blend components from the reaction product; and mixing the fractionated light fraction with part of the rich gas separated from a gas-liquid separator, and letting the mixture enter a high temperature reactor to undergo high temperature aromatization reaction so as to generate aromatic hydrocarbon, with the catalyst adopted by the high temperature aromatization reaction being a spent catalyst left by low temperature aromatization reaction. With the method provided by the invention, the spent catalyst left by low temperature aromatization reaction and the high olefin content light fraction with heat release characteristics can be effectively utilized to carry out high temperature aromatization reaction again to generate mixed aromatic hydrocarbon. While enhancing the liquid yield, the method fully improves the utilization efficiency of the catalyst and greatly reduces the energy consumption of equipment, thus having significant economic benefits.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for upgrading Fischer-Tropsch synthetic naphtha. Background technique [0002] Fischer-Tropsch naphtha is a gasoline fraction with a high olefin content. Compared with catalytic cracking gasoline, the linear olefins are greater than 55%, and the octane number RON<40 is far lower than that of catalytic cracking gasoline, so it cannot be directly used as fuel oil or blending components. It is of great significance to adopt an effective method to modify Fischer-Tropsch naphtha to produce high-octane gasoline. [0003] The traditional hydrofining process can effectively reduce the content of olefins in Fischer-Tropsch naphtha, but the octane number of naphtha after hydrogenation is lower and consumes a lot of hydrogen. [0004] Fischer-Tropsch synthetic naphtha also has the characteristics of no sulfur, nitrogen and low aromatics. After dehydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G61/00
Inventor 朱伟郝代军沈方峡任潇航俞安平
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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