Catalytic cracking method and device capable of increasing propylene yield and improving properties of gasoline

A technology of catalytic cracking and gasoline properties, applied in the direction of catalytic cracking, cracking, petroleum industry, etc., can solve the problems that it is difficult to achieve conversion conditions, and it is difficult to achieve high conversion rate of propylene, so as to achieve the reduction of olefin volume content, sulfur content reduction, The effect of property improvement

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The production of propylene from light hydrocarbon raw materials such as butene and light gasoline requires reaction conditions of high temperature, large ratio of agent to oil, and low space velocity. Due to the limitations of the reactor and process, it is difficult to achieve the ideal conversion conditions for propylene. high conversion rate

Method used

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  • Catalytic cracking method and device capable of increasing propylene yield and improving properties of gasoline
  • Catalytic cracking method and device capable of increasing propylene yield and improving properties of gasoline
  • Catalytic cracking method and device capable of increasing propylene yield and improving properties of gasoline

Examples

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Effect test

Embodiment 1

[0041] Example 1 illustrates the effect of the catalytic cracking method provided by the present invention comprising a two-stage riser reaction zone plus a bed reactor to increase propylene production and improve gasoline properties.

[0042] The test device is a medium-sized catalytic cracking unit, the total length of the main riser is 8 meters, the inner diameter of the first-stage reaction zone of the riser is 18mm, and the inner diameter of the second-stage reaction zone is 21mm; the heights of the first-stage reaction zone and the second-stage reaction zone of the riser are respectively 2.0 m, 6.0m. The bed reactor has an inner diameter of 60mm and a height of 2000mm. The conventional catalytic cracking catalyst MLC-500 with active component Y was used for catalytic conversion of hydrocarbon oil. The reaction process is attached figure 1 As shown, the main operating conditions and product distribution are listed in Table 4 and Table 5, and the properties of product ga...

Embodiment 2

[0045] Example 2 illustrates the effect of the catalytic cracking method provided by the present invention comprising a three-stage reaction zone for increasing propylene production and improving gasoline properties.

[0046] The test device is a medium-sized catalytic cracking unit. The total length of the main riser is 8 meters. The heights of the zone and the third-stage reaction zone are 2.0m, 4.0, and 2.0m, respectively. The bed reactor has an inner diameter of 60mm and a height of 2000mm. Catalytic cracking catalyst CRP-1 with both Y-type zeolite and ZSM-5 zeolite was used for catalytic conversion of hydrocarbon oil. The reaction process is attached figure 2 As shown, the heavy raw material is introduced into the riser for reaction, and the light raw material is introduced into the bed reactor for reaction. The catalyst properties, heavy raw material properties and light raw material properties are shown in Table 1, Table 2 and Table 3 respectively. The main operatin...

Embodiment 3

[0049] Example 3 illustrates the effect of the catalytic cracking method provided by the present invention comprising a three-stage reaction zone for increasing propylene production and improving gasoline properties.

[0050] The test device is a medium-sized catalytic cracking device, and the structures of the main riser and the bed reactor are the same as in Example 2. Catalyst is with embodiment 2. The reaction process is attached figure 2 As shown, the main operating conditions and product distribution are listed in Table 4 and Table 5, and the properties of product gasoline are listed in Table 6.

[0051] It can be seen from Table 5 and Table 6 that the liquefied gas yield is 32.16wt%, the propylene yield is 15.2wt%, the gasoline olefin volume content is 30.2%, the sulfur content is 202ug / g, and the research octane number is 94.8.

[0052] Table 1 Catalyst properties

[0053] catalyst

MLC-500

CRP-1

MA

64

64

RE 2 o 3 , wt%...

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Abstract

The invention provides a catalytic cracking method and a catalytic cracking device capable of increasing propylene yield and improving properties of gasoline. The method comprises: (1) introducing a heavy oil raw material into the first reaction area of a riser reactor and mixing and contacting the heavy oil raw material with a regenerant to perform an reaction under a catalytic cracking condition; and (2) allowing light hydrocarbon raw materials to enter a bed reactor from the bottom and contact with another path of regenerant entering the bed reactor from the top in countercurrent for reaction, wherein after reaction, the catalyst is striped and delivered to the second reaction area of the riser reactor to mix, contact the catalyst with the oil gas and catalyst in a riser for reaction; and after reaction, the oil gas and catalyst are separated, the separated catalyst is stripped, regenerated and recycled, and the separated reaction oil gas is further separated to give products such as liquefied gas, gasoline and diesel oil. The method provided by the invention can improve low-carbon olefin yield of a catalytic cracking device, convert butene and benzene into propylene and ethylene, avoid influencing the adoption of other heavy raw materials by the device and obviously improve the properties of the gasoline.

Description

technical field [0001] The invention belongs to the field of catalytic cracking of petroleum hydrocarbons and provides a process and a reactor for increasing the production of low-carbon olefins. Background technique [0002] Low-carbon olefins such as ethylene and propylene are widely used petrochemical basic raw materials. The general catalytic cracking unit only has a riser reactor, and the propylene yield is below 10wt%. The fraction butene and light gasoline of the conventional catalytic cracking unit have high conversion rate of propylene and ethylene in the small fixed fluidized bed test unit, but it is difficult to achieve high and low carbon olefin yield due to the lack of catalytic cracking process combined with its process conditions. Rate. The existing catalytic cracking process with a new reactor is mostly used for the purpose of gasoline upgrading. This process is a catalytic cracking process that increases the production of propylene and improves the properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/18
Inventor 于敬川毛安国朱根权
Owner CHINA PETROLEUM & CHEM CORP
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