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A method for converting raw materials containing naphtha into light olefins and/or aromatics

A low-carbon olefin and naphtha technology, applied in the field of catalysis, can solve the problems of naphtha pyrolysis that cannot be ignored and high methane yield

Active Publication Date: 2021-08-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal cracking of naphtha in the riser reactor cannot be ignored, and the methane yield is relatively high

Method used

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  • A method for converting raw materials containing naphtha into light olefins and/or aromatics
  • A method for converting raw materials containing naphtha into light olefins and/or aromatics
  • A method for converting raw materials containing naphtha into light olefins and/or aromatics

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Experimental program
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Embodiment 1

[0085] like figure 1 In the shown device, the catalyst is a microsphere containing naphtha catalytic cracking activity, the molecular sieve weight content in the catalyst is 30%, and the particle size range is 30-300 microns. Raw materials including naphtha enter the fast fluidized bed reactor through the feed port of the fast fluidized bed reactor to react with the catalyst, and the generated product enters the product gas outlet pipeline, and the catalyst enters the stripper. The inclined pipe and the riser enter the regenerator, and the regenerated catalyst enters the fast fluidized bed reactor through the stripping section of the regenerator and the regenerated inclined pipe. The product gas enters the separation system through the product gas outlet pipeline to obtain different products. Catalyst circulation is controlled by plug or slide valves. The composition of naphtha is shown in Table 1. Fast fluidized bed reactor conditions: reaction temperature 580°C, reaction ...

Embodiment 2

[0090] According to the conditions and steps described in Example 1, the catalyst is a microsphere containing naphtha catalytic cracking activity, the molecular sieve weight content in the catalyst is 10%, and the particle size range is 50-150 microns. Fast fluidized bed reactor conditions: reaction temperature 650°C, reaction pressure 0.1MPa by gauge pressure, gas phase linear velocity 5m / s, solvent-oil ratio 20. The product gas is analyzed by online chromatography, and the mass yield of olefins is 43%, the mass yield of aromatics is 20%, and the mass yield of methane is 7%.

Embodiment 3

[0092] According to the conditions and steps described in Example 1, the catalyst is a microsphere containing naphtha catalytic cracking activity, the molecular sieve weight content in the catalyst is 50%, and the particle size range is 50-150 microns. Fast fluidized bed reactor conditions: reaction temperature 690°C, reaction pressure 0.2MPa in gauge pressure, gas phase linear velocity 10m / s, solvent-oil ratio 80. The product gas is analyzed by online chromatography, and the mass yield of olefins is 46%, the mass yield of aromatics is 15%, and the mass yield of methane is 8%.

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Abstract

The application discloses a method for converting a raw material containing naphtha into light olefins and / or aromatics, which is characterized in that it comprises the following steps: a) passing the raw material containing naphtha into a fast fluidized bed reactor , contact with the catalyst to obtain the product gas and the catalyst to be regenerated; the product gas is separated to obtain light olefins and / or aromatics; b) the catalyst to be regenerated enters the regenerator for regeneration to obtain the regenerated catalyst; c) the regenerated catalyst returns to the fast Fluidized bed reactor. The method reduces the influence of the thermal cracking reaction in the naphtha catalytic cracking technology, and reduces the yield of methane in the product.

Description

technical field [0001] The application relates to a method for converting raw materials containing naphtha into light olefins and / or aromatics, which belongs to the field of catalysis. Background technique [0002] Naphtha is one of the most important raw materials for the production of ethylene and propylene, and its high-temperature steam cracking to produce ethylene, propylene and other chemical products is a huge petrochemical industry. Every year hundreds of millions of tons of naphtha is used to produce ethylene and propylene, and its output accounts for more than 50% of the total production of ethylene and propylene. After years of development, steam cracking technology has reached a very high level, and its conversion rate is high. After one reaction, the yield of products can reach a higher level. However, the disadvantages are also obvious, such as poor selectivity, a large amount of methane generated in the product, high reaction temperature and high energy consu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/06C07C11/04C07C11/06C07C11/08C07C15/04C07C15/06C07C15/08
CPCC07C4/06C07C2529/40C07C11/04C07C11/06C07C11/08C07C15/04C07C15/06C07C15/08Y02P20/584
Inventor 赵银峰叶茂刘中民唐海龙王静张今令张涛塔拉勒·哈利德·阿尔·沙马里
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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