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Method for catalyzing light gasoline to reduce olefin

A technology for light gasoline and olefins, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil processing products, etc., can solve the problems of high energy consumption and complex process flow, and achieve the effect of low energy consumption, simple separation process and increased output.

Active Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new catalytic gasoline olefin reduction method for the problems of complex process flow and high energy consumption in the production process of catalytic gasoline olefin reduction existing in the prior art

Method used

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  • Method for catalyzing light gasoline to reduce olefin

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] Provide a stream of catalysis light gasoline raw material that is 10 tons / hour, wherein the content of carbon five carbon hexaolefins is 50% (by mass fraction, the same below), the content of carbon five carbon six alkane is 45%, and the content of carbon four hydrocarbons is 5%. according to figure 1 The reaction shown in the process, wherein the reaction temperature of olefin catalytic cracking reaction is 550°C, the reaction pressure is 0.05MPaG, and the reaction space velocity is 10h -1 . The reaction product is pressurized to 2.0MPaG by the compressor, and then sent to the depropanizer. From the top of the depropanizer, 3.7 t / h of C3-feed was obtained with an olefin (ethylene+propylene) concentration of 81%. The operating pressure of the debutanizer is 0.35MPaG, the temperature at the top of the tower is 48°C, the temperature at the bottom of the tower is 92°C, and the number of trays is 38. The flow rate of the gas phase circulating material is 4 tons / hour, wh...

Embodiment 2

[0047] According to the conditions and steps described in Example 1, the C5C6O content in the light gasoline raw material is 60%, the C5C6A content is 35%, and the C4H content is 5%. The reaction temperature of olefin catalytic cracking is 540℃, the reaction pressure is 0.03MPaG, and the reaction space velocity is 7h -1 . The reaction product is pressurized to 2.0MPaG by the compressor, and then sent to the depropanizer. From the top of the depropanizer, 4.22 t / h of C3-material was obtained, in which the concentration of olefins (ethylene+propylene) was 83%. The operating pressure of the debutanizer is 0.5MPaG, the temperature at the top of the tower is 55°C, the temperature at the bottom of the tower is 100°C, and the number of trays is 45. The flow rate of the gas phase circulating material is 5 tons / hour, the concentration of C4 monoolefins is 36%, and the circulation ratio is 0.5. The output of liquefied gas is 0.89 tons / hour. The production of naphtha was 4.9 t / h with...

Embodiment 3

[0049] According to the conditions and steps described in Example 1, the C5C6O content in the light gasoline raw material is 40%, the C5C6A content is 55%, and the C4H content is 5%. The reaction temperature of olefin catalytic cracking is 560℃, the reaction pressure is 0.03MPaG, and the reaction space velocity is 5h -1 . The reaction product is pressurized to 2.0MPaG by the compressor, and then sent to the depropanizer. From the top of the depropanizer, 3.24 t / h of C3-material was obtained, in which the concentration of olefins (ethylene+propylene) was 81%. The operating pressure of the debutanizer is 0.45MPaG, the temperature at the top of the tower is 52°C, the temperature at the bottom of the tower is 96°C, and the number of trays is 25. The flow rate of the gas phase circulating material is 4 tons / hour, the concentration of C4 monoolefins is 33%, and the circulation ratio is 0.4. The output of liquefied gas is 0.82 tons / hour. Naphtha production was 5.94 t / h with an ol...

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Abstract

The invention discloses a method for catalyzing light gasoline to reduce olefin, which comprises the following steps: (1) carrying out gasification treatment on a light gasoline raw material to obtain a gas-phase cracking raw material; (2) performing olefin catalytic cracking treatment on the gas-phase cracking raw material to obtain a cracking reaction product; (3) carrying out separation treatment on the cracking reaction product to obtain a C3 and below material flow, a gas-phase circulating material, liquefied gas and crude gasoline; (4) circulating the gas-phase circulating material back to the step (2), combining the gas-phase circulating material with the gas-phase cracking raw material, and carrying out olefin catalytic cracking treatment. The method can effectively reduce the gasoline yield, reduce the olefin content in gasoline, increase the yield of ethylene and propylene and effectively prevent coking, and has the advantages of simple process flow, relatively low energy consumption and good technical effect.

Description

technical field [0001] The invention relates to a method for catalyzing light gasoline to reduce olefins. Background technique [0002] FCC gasoline produced by fluid catalytic cracking (FCC) units is the main source of motor gasoline in my country, accounting for more than 70% of the total gasoline consumption. A major feature of FCC gasoline is its high olefin content, usually 40% to 50%, which is much higher than the limit value of olefin content in National VI gasoline standards. In order to meet the needs of upgrading gasoline oil products, a variety of gasoline olefin reduction technologies have been developed in China, including the development of new FCC catalysts with low olefin yields and the development of fluidized catalytic technologies that produce more isoparaffins. With the new technology, the olefin content of catalytic gasoline has been reduced to a certain extent, but it is generally still higher than the requirements of the National VI B standard (15%), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/1037C10G2400/20Y02P20/52
Inventor 金鑫卢和泮陈伟
Owner CHINA PETROLEUM & CHEM CORP
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