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Naphtha-containing raw material conversion method

A technology for naphtha and raw materials, applied in the field of catalysis, can solve problems such as small adjustable range, and achieve the effect of increasing the adjusting range and improving the ability to resist market fluctuation risks

Pending Publication Date: 2020-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But relatively small adjustable range

Method used

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  • Naphtha-containing raw material conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 In the device shown, the catalyst is a microsphere catalyst containing naphtha catalytic cracking activity, the weight content of molecular sieve in the catalyst is 30%, and the particle size range is 50-150 microns. Raw materials including naphtha enter the riser reactor to contact with the catalyst, the generated product and catalyst flow enter the expansion section of the fluidized bed reactor for separation, the product enters the product gas outlet pipeline, and the catalyst enters the reaction section of the fluidized bed reactor, including the Raw materials of naphtha or / and methanol enter the reaction section of the fluidized bed reactor through the feed port of the fluidized bed reactor to react with the catalyst, and the generated product enters the product gas outlet pipeline, and the catalyst descends into the stripping section of the fluidized bed reactor. After stripping, it enters the regenerator through the inclined pipe to be produced a...

Embodiment 2

[0063] According to the conditions and steps described in Example 1, the catalyst is a microsphere containing naphtha catalytic cracking activity, the weight content of molecular sieve in the catalyst is 30%, and the particle size range is 50-150 microns. The carbon content of the regenerated catalyst is lower than 0.5%. Riser reactor conditions: reaction temperature is 680°C, reaction pressure is 0.01MPa by gauge pressure, gas phase linear velocity is 3m / s; fluidized bed reactor conditions: reaction temperature is 670°C, reaction pressure is 0.01MPa by gauge pressure 0.01MPa, the gas phase velocity is 1m / s, and the mass ratio of naphtha and methanol is 10. The mass ratio of the feed to the riser reactor and the fluidized bed reactor was 9:1. Keep the catalyst circulation stable, and the mass space velocity of the fluidized bed reactor is 0.5h -1 . The product gas is analyzed by online chromatography, and the mass yield of olefins is 45%, the mass yield of BTX is 18%, and t...

Embodiment 3

[0065] According to the conditions and steps described in Example 1, the catalyst is a microsphere containing naphtha catalytic cracking activity, the weight content of molecular sieve in the catalyst is 30%, and the particle size range is 50-150 microns. The carbon content of the regenerated catalyst is lower than 0.5%. Riser reactor conditions: reaction temperature is 680°C, reaction pressure is 0.01MPa by gauge pressure, gas phase linear velocity is 3m / s; fluidized bed reactor conditions: reaction temperature is 670°C, reaction pressure is 0.01MPa by gauge pressure 0.01MPa, the gas phase velocity is 1m / s, and the mass ratio of naphtha and methanol is 0.5. The mass ratio of the feed amount of the riser reactor and the fluidized bed reactor is 1:9. Keep the catalyst circulation stable, and the mass space velocity of the fluidized bed reactor is 1.5h -1 . The product gas is analyzed by online chromatography, and the mass yield of olefins is 72%, the mass yield of BTX is 16%...

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Abstract

The invention discloses a naphtha-containing raw material conversion method, which comprises: a)carrying out a contact reaction on a naphtha-containing raw material and a catalyst in a riser reactor,introducing into a fluidized bed reactor, and carrying out separation through an expansion section of the fluidized bed reactor to obtain a product gas I and a catalyst subjected to carbon pre-deposition; and allowing the catalyst subjected to carbon pre-deposition to descend to the reaction section of the fluidized bed reactor; b)inputting a raw material containing naphtha and / or methanol from the bottom of the fluidized bed reactor, ascending to the reaction section of the fluidized bed reactor, and contacting with the catalyst subjected to carbon deposition to obtain a product gas II and ato-be-regenerated catalyst; and allowing the to-be-regenerated catalyst to descend and enters a regenerator to be regenerated to obtain the regenerated catalyst; and c)returning the regenerated catalyst to the riser. The method is applied to naphtha catalytic cracking and has the advantage that the variety of products can be adjusted.

Description

technical field [0001] The invention relates to a method for converting raw materials containing naphtha into light olefins, aromatics and high-quality gasoline, belonging to the field of catalysis. Background technique [0002] Naphtha is one of the most important raw materials for the production of ethylene and propylene. The high-temperature steam cracking of naphtha to produce chemical products such as ethylene and propylene is a huge petrochemical industry. Hundreds of millions of tons of naphtha is used to produce ethylene propylene every year, and its output accounts for more than 50% of the total production of ethylene 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 hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C10G11/00C07C11/04C07C11/06C07C11/08C07C15/04C07C15/06C07C15/08
CPCC07C4/06C10G11/00C07C11/04C07C11/06C07C11/08C07C15/04C07C15/06C07C15/08Y02P20/584
Inventor 赵银峰叶茂刘中民唐海龙王静张今令张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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