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Catalytic conversion process of preparing ethylene and propylene

A catalytic conversion method and propylene technology, which are applied in directions such as naphtha catalytic reforming, can solve problems such as the production limit of light petroleum hydrocarbons, and achieve the effects of reducing excessive thermal cracking reaction, reducing energy consumption, and improving selectivity

Inactive Publication Date: 2003-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As crude oil gets heavier, production of light petroleum hydrocarbons is constrained

Method used

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  • Catalytic conversion process of preparing ethylene and propylene
  • Catalytic conversion process of preparing ethylene and propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example illustrates: the experimental results obtained by implementing the method provided by the present invention using a medium-sized variable-diameter riser reactor.

[0030] The total height of the medium-sized variable diameter riser reactor used in the test is 15 meters, the diameter of its dilute phase reaction zone is 0.025 meters, and its height is 4.5 meters; the diameter of its dense phase reaction zone is 0.1 meters, and its height is 9.0 meters. The structure of the reactor is referred to CN1237477A.

[0031] The feed oil ① in Table 1 and the four catalysts in Table 2 were used to test respectively. The main test steps are as follows: figure 1 As shown, the hot regenerated catalyst enters the bottom of the variable-diameter riser reactor through the regenerated inclined pipe 16, and is accelerated to flow upward under the action of the pre-lift medium injected from the pipeline 1. The preheated 50% by weight raw oil ① is mixed with the atomized stea...

Embodiment 2

[0034] This embodiment illustrates: the test results obtained by using the method provided by the present invention with hydrocarbon oils of different properties as raw materials.

[0035] The medium-sized variable-diameter riser reactor used in the test is the same as that in Example 1. Catalyst A listed in Table 2 was adopted, and four kinds of hydrocarbon oils in Table 1 were used as raw materials for testing, and the main test steps were the same as in Example 1.

[0036] The operating conditions and product distribution of the tests are listed in Table 4. It can be seen from Table 4 that the difference in the properties of hydrocarbon oil raw materials has a greater impact on the yield of low-carbon olefins, and the yield of ethylene varies greatly, ranging from 10.46 to 16.05% by weight; the yield of propylene is next, ranging from 15.36 to 20.76 % by weight; the yield of butene varies little, ranging from 9.26 to 11.21% by weight.

Embodiment 3

[0038] This embodiment illustrates: the influence of different operating conditions on the implementation effect of the method provided by the present invention.

[0039] The medium-sized variable-diameter riser reactor used in the test is the same as that in Example 1. Catalyst A listed in Table 2 and feed oil 1. in Table 1 were used to test, and the main test steps were the same as in Example 1.

[0040] The operating conditions and product distribution for the tests are listed in Table 5. As can be seen from Table 5, different operating conditions have different influences on the yield of low-carbon olefins. The yield of ethylene is 12.05 to 18.21% by weight; the yield of propylene is 21.10 to 23.40% by weight; butene yield is 9.36% by weight. ~13.21% by weight.

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PUM

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Abstract

In the catalytic conversion process of preparing ethylene and propylene, preheated hydrocarbon oil A is injected into the dilute phase reaction area to contact with high-silicon zeolite catalyst for reaction in the reaction conditions of 630-750 deg.c temperature, 0.15-0.40 MPa pressure, 0.2-3 second reaction time, catalyst-to-material oil weight ratio of 15-40 and water vapor-to-material oil weight ratio of 0.3-1.2; the reactant flow is then introduced into the dense phase reaction area to contact with injected hydrocarbon oil B for further reaction in the reaction conditions of 500-600 deg.c temperature, 0.15-0.40 MPa pressure, 3-20 second reaction time, catalyst-to-material oil weight ratio of 7-20 and water vapor-to-material oil weight ratio of 0.15-0.6.

Description

technical field [0001] The invention belongs to a catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, more specifically, a catalytic conversion method for producing ethylene and propylene. Background technique [0002] The traditional method of producing ethylene from petroleum hydrocarbons is steam thermal cracking, and the suitable raw materials are light petroleum hydrocarbons such as ethane, propane, butane, natural gas, naphtha or light diesel oil. As crude oil becomes heavier, the production of light petroleum hydrocarbons is limited. In recent years, some patent documents disclose methods for producing light olefins from heavy petroleum hydrocarbons. [0003] CN1004878B discloses a catalytic cracking method for producing propylene and butene, using a fluidized bed or moving bed reactor and a solid acid catalyst, at a reaction temperature of 500-600°C and a feed weight space velocity of 0.2-20 -1 , the reaction is carried out under the c...

Claims

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Application Information

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IPC IPC(8): C10G35/04
Inventor 许友好谢朝钢
Owner CHINA PETROLEUM & CHEM CORP
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