A method for catalytic conversion of hydrocarbons to produce propylene and light aromatics

A catalytic conversion method and technology for light aromatic hydrocarbons, which are applied in the field of catalytic cracking, can solve the problems that are not involved in improving the yield of light aromatic hydrocarbons, and increase the selectivity and yield of propylene in a catalytic cracking unit. The effect of high catalyst utilization efficiency and wide application range

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although the above technologies have made significant progress in increasing the yield of catalytic cracking propylene, the limitations of increa

Method used

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  • A method for catalytic conversion of hydrocarbons to produce propylene and light aromatics
  • A method for catalytic conversion of hydrocarbons to produce propylene and light aromatics
  • A method for catalytic conversion of hydrocarbons to produce propylene and light aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The heavy oil raw material enters the riser reactor 1, and a part of the regenerated catalyst (the first regenerated catalyst) is introduced into the riser reactor 1 through the catalyst delivery pipe 11; a part of the regenerated catalyst (the second regenerated catalyst) is delivered to the fluidized The top of the bed of the bed reactor 3 (that is, the second stream of regenerated catalyst is introduced into the fluidized bed reactor 3 from the top of the reactor 3). The C4 fraction (the olefin content is 60% by weight) and the light gasoline fraction (the distillation range is 35-85°C, the olefin content is 65% by weight) obtained from the fractionation unit are introduced into the bottom of the riser reactor 1 (at the same height as the heavy feedstock) ). The pressure of the settler is 0.18MPa (absolute pressure). Dilution steam is introduced from the middle (half of the height) of the riser reactor. The stripped oil gas is introduced into the fluidized bed reac...

Embodiment 2

[0069] The process is the same as in Example 1. The heavy oil raw material enters the riser reactor 1, and the delivery pipe 2 is the delivery channel for the regenerated catalyst. After hydrogenation (the catalyst used is RN-1, the product of Sinopec Catalyst Changling Branch) enters the bottom of fluidized bed reactor 3, recycles the heavy gasoline fraction (distillation range is 145-225°C) and mixes it with heavy oil feedstock and introduces it into the riser At the bottom of reactor 1, the ratio of the amount introduced to the weight of the heavy oil feedstock is 10% by weight. Dilution steam is introduced into the middle of the riser reactor, and the stripping oil gas is introduced into the fluidized bed reactor 3 from the bottom of the fluidized bed reactor, and enters the settler after passing through the fluidized bed reactor, and the stripping steam accounts for 3% of the heavy oil raw material. weight%. The reaction conditions and reaction results are shown in Table...

Embodiment 3

[0071] The flow process is the same as in Example 1, except that the back-refined C4 and light gasoline components are introduced into the bottom of the fluidized bed reactor 3 . Reaction conditions and reaction result are shown in Table 2, and all the other conditions are with embodiment 1.

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Abstract

The invention provides a method for producing propylene and light arenes by catalytic conversion of hydrocarbons, and the method comprises: carrying out contact reaction on a hydrocarbon raw material and a first regenerated catalyst in a first reactor under a catalytic cracking condition; then introducing a fluidized bed reactor connected with the first reactor in series for reaction; after the reaction is finished, introducing oil vapor into a fractionation device for fractionation; and introducing a spent catalyst into a stripper, wherein a second regenerated catalyst is introduced into the fluidized bed reactor and the spent catalyst contains modified beta zeolite. The method provided by the invention has higher yields of propylene and light arenes, and is suitable for the production of propylene and light arenes by the catalytic conversion of the hydrocarbon raw materials.

Description

technical field [0001] This invention relates to the catalytic cracking of hydrocarbon feedstocks in the absence of hydrogen, and more particularly to a process for the production of propylene and light aromatics from hydrocarbon feedstocks. Background technique [0002] Light olefins and light aromatics (benzene, toluene and xylene, referred to as BTX) are basic chemical raw materials. At present, BTX mainly comes from light hydrocarbon reforming process and steam thermal cracking process, and light olefins mainly come from natural gas, light petroleum hydrocarbon steam thermal cracking and hydrocarbon oil catalytic cracking. As crude oil becomes heavier, the shortage of light hydrocarbon raw materials is becoming more and more serious, and the technical route of producing light olefins and light aromatics through catalytic cracking using heavy oil as raw material has gradually been paid attention to. However, the yield of light olefins and aromatics in the conventional ca...

Claims

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Application Information

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IPC IPC(8): C10G55/06C10G69/00C07C11/06C07C4/06
CPCY02P20/52Y02P20/584
Inventor 朱根权谢朝钢张执刚陈昀
Owner CHINA PETROLEUM & CHEM CORP
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