Catalytic conversion method for preducing more propylene

A catalytic conversion method and propylene technology, which are applied in chemical recovery, organic chemistry, bulk chemical production, etc., can solve the problems of increasing the propylene selectivity and yield limitations of catalytic cracking units, and achieve the effect of continuous regeneration operation.

Active Publication Date: 2007-02-14
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although the above technologies have made relatively obvious progress in increasing the yield of catalytic cracking propylene, they all mainly rely on increasing the yield of liquefied gas from catalytic cracking to increase the yield of propylene. , aromatization and hydrogen transfer reactions, the limitations of increasing the selectivity and yield of propylene in the catalytic cracking unit are still very large

Method used

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  • Catalytic conversion method for preducing more propylene

Examples

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Comparison scheme
Effect test

Embodiment 1

[0053] This example illustrates the catalytic conversion process of hydrocarbon oil using Catalyst A containing Y-type zeolite on the medium-scale double riser reaction regeneration system provided by the present invention.

[0054] The total height of the main riser reactor of the reaction regeneration system is 15 meters, and the diameter is 0.25 meters; the total height of the auxiliary riser reactor is 12 meters, and the diameter is 0.25 meters. The heights are 4.4 meters, 5.2 meters and 2.4 meters respectively. The main operating conditions and product distribution are listed in Table 3, and the properties of gasoline are listed in Table 4.

[0055]It can be seen from the data in Table 3 that the yield of liquefied gas is 16.00% by weight, and the yield of propylene is 7.05% by weight.

Embodiment 2

[0057] This example illustrates the process of catalytic conversion of hydrocarbon oil using the cracking catalyst B containing both Y-type zeolite and ZSM-5 zeolite active components on the medium-scale double-riser reaction regeneration system provided by the present invention.

[0058] The total height of the main riser reactor of the reaction regeneration system is 15 meters, and the diameter is 0.25 meters; the total height of the auxiliary riser reactor is 12 meters, and the diameter is 0.25 meters. The heights are 4.4 meters, 5.2 meters and 2.4 meters respectively. The main operating conditions and product distribution are listed in Table 3, and the properties of gasoline are listed in Table 4.

[0059] It can be seen from the data in Table 3 that the propylene yield was 17.21% by weight.

Embodiment 3

[0061] This example illustrates the process of catalytic conversion of hydrocarbon oil using Catalyst B containing both Y-type zeolite and ZSM-5 zeolite on the medium-scale novel double riser reaction regeneration system provided by the present invention.

[0062] The main reactor of the reaction regeneration system has a total height of 15 meters and a diameter of 0.25 meters; the total height of the auxiliary riser reactor is 12 meters, the diameter of the first reaction zone is 0.25 meters, and its height is 4.4 meters; the diameter of the second reaction zone The diameter of the outlet area is 0.25 meters, and its height is 2.4 meters. The main operating conditions and product distribution are listed in Table 3, and the properties of gasoline are listed in Table 4.

[0063] It can be seen from the data in Table 3 that the yield of propylene was 18.22% by weight.

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Abstract

The invention is a productive propylene catalytic conversion method, injecting preheated raw materials into the main riser of a double-riser reaction regenerating system to contact with hot catalyst so as to make catalytic cracking reaction, and separating products, where the coked products are recycled after raw catalyst is stripped and regenerated; injecting liquefied gas product into an auxiliary riser to contact with hot catalyst so as to make superposition and catalytic cracking and paraffin dehydrogenation reactions in two reacting regions in the auxiliary riser, respectively, and separating products for recycle after raw catalyst is regenerated. And it further converts the liquefied gas products into propylene, and remarkably raises the yield of propylene on the premise of not increasing the productivity of liquefied gas.

Description

technical field [0001] The present invention relates to a method for catalytic conversion of hydrocarbon oil in the absence of hydrogen, more specifically, a method for catalytic conversion of hydrocarbon oil to produce light hydrocarbon products while significantly increasing the yield of propylene. Background technique [0002] Catalytic cracking is one of the most important processes in the oil refining industry. Conventional catalytic cracking technology mostly adopts the reaction regeneration system process of single riser reactor with equal diameter. In the riser reaction regeneration system, the preheated raw oil enters the riser reactor through the feed nozzle, contacts with the high-temperature catalyst (called regenerated catalyst) from the regenerator, vaporizes and reacts. During the reaction process, coke is continuously generated and deposited on the surface of the catalyst and the active center, which reduces the activity of the catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C07C11/06
CPCY02P20/52Y02P20/584
Inventor 龙军蒋文斌田辉平张久顺朱根权朱玉霞陈蓓艳宋海涛
Owner CHINA PETROLEUM & CHEM CORP
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