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Method for catalytic conversion production of propylene and light aromatics

A catalytic conversion method and technology for catalytic conversion, which are applied in the field of catalytic conversion of hydrocarbons, can solve the problems of increasing the selectivity and yield of propylene in a catalytic cracking unit, and achieve the improvement of comprehensive conversion rate, high process flexibility, and energy efficiency. consumption reduction effect

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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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  • Method for catalytic conversion production of propylene and light aromatics
  • Method for catalytic conversion production of propylene and light aromatics
  • Method for catalytic conversion production of propylene and light aromatics

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The trade name of the catalyst used is DMMC-1, produced by Qilu Catalyst Branch of Sinopec Co., Ltd. Use as attached figure 1 The medium-scale test device shown, wherein the heavy oil riser reactor has an inner diameter of 18 mm and a height of 6 meters, the fluidized bed reactor has an inner diameter of 64 mm and a height of 0.5 meters, and the auxiliary riser reactor has an inner diameter of 16 mm, The height is 5 meters. The diameter reduction ratio of the dilute phase pipe at the outlet of the fluidized bed reactor is 30%. The catalyst was aged at 800° C. with 100% steam for 10 hours, and the loading capacity of the catalyst in the composite reactor was 60 kg.

[0051] The heavy hydrocarbon oil raw material is introduced into the heavy oil cracking riser reactor and contacted with the catalyst for catalytic cracking reaction; the hydrocarbon oil raw material is not introduced into the auxiliary riser reactor, which is a catalyst delivery channel. The properties o...

Embodiment 2

[0053] The catalyst and reaction device used in Example 2 are the same as those in Example 1. The heavy hydrocarbon oil raw material is introduced into the heavy oil cracking riser reactor to contact the catalyst for catalytic cracking reaction, and the re-refined C4 component is introduced into the auxiliary riser reactor to carry out reaction. See Table 1 for the properties of the heavy oil raw material, Table 2 for the composition of back-refined C4, and Table 4 for the reaction conditions and yield.

Embodiment 3

[0055] The catalyst and reaction device used in Example 3 are the same as in Example 1. The heavy hydrocarbon oil feedstock is introduced into the heavy oil cracking riser reactor to contact with the catalyst to carry out the catalytic cracking reaction, and the recycled C4 component and light gasoline component are introduced into the auxiliary The reaction was carried out in a riser reactor. The catalyst-to-oil ratio in the examples refers to the weight ratio of catalyst to fresh feed. The properties of the heavy hydrocarbon oil feedstock are shown in Table 1, the composition of light gasoline is shown in Table 2, and the reaction operating conditions and results are shown in Table 4.

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Abstract

The invention provides a method for catalytic conversion production of propylene and light aromatics, which is characterized in that a hydrocarbon raw material and a catalytic cracking catalyst are contacted in a composite reactor for reacting under the catalytic cracking condition, the reaction products and the to-be-regenerated catalyst are separated, the separated to-be-regenerated catalyst is circularly used through stripping and performing coke burn-off regeneration, the separated reaction products is fractionated to obtain low carbon olefin, gasoline containing light aromatics and the like, and separated to obtain the light aromatics further; the composite reactor comprises a riser reactor and a fluidized bed reactor, an outlet of the riser reactor is communicated with a lower part of the fluidized bed reactor, a stripper is positioned at the lower part of the fluidized bed reactor, an upper part of the stripper is communicated with the bottom of the fluidized bed reactor, and the outlet of the fluidized bed reactor is communicated with the inlet of a gas solid separation device in a settler though a conveying pathway, a catalyst outlet of the settler is communicated with the lower part of the fluidized bed reactor. According to the invention, propylene and light aromatics enable high yield by using the method.

Description

technical field [0001] The invention relates to a method for catalytic conversion of hydrocarbons, more specifically, relates to a method for catalytically cracking hydrocarbon feedstock oil in a composite reactor so as to obtain propylene and light aromatics with high yield. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic chemical raw materials. At home and abroad, natural gas and light petroleum hydrocarbons are mostly used to produce low-carbon olefins by steam cracking in ethylene complexes. The second largest source of light olefins is the refinery's catalytic cracking (FCC) unit. Conventional catalytic cracking process produces gasoline and light diesel oil by-product light olefins, but its yield only accounts for less than 15% of the raw oil. It is predicted that during 2010-2015, the demand for propylene will grow at an annual rate of 4.7%, and the demand will nearly double by 2010. [0003] Light aromatics ...

Claims

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Application Information

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IPC IPC(8): C10G69/04C07C4/06C07C11/06C07C15/00
CPCY02P20/52Y02P20/584
Inventor 谢朝钢鲁维民朱根权陈昀常学良张执刚李正
Owner CHINA PETROLEUM & CHEM CORP
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