Method for producing low-carbon olefins by using methanol and naphtha

A low-carbon olefin and naphtha technology, applied in the petroleum industry, ethylene production, biological raw materials, etc., can solve the problem of low yield of low-carbon olefins, and achieve the effect of improving the yield

Inactive Publication Date: 2013-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the low yield of low-carbon olefins existing in the prior art, and a new method for producing low-carbon olefins with methanol and naphtha is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]In the circulating fluidized bed reaction-regeneration device, methanol and naphtha enter the fluidized bed reactor at a weight ratio of 0.1:1, contact with the catalyst, and generate products including low-carbon olefins, and at the same time form a spent catalyst , the regenerated catalyst formed after the spent catalyst enters the regenerator for regeneration returns to the reactor to continue to participate in the reaction. Catalyst is the mixed catalyst of SAPO-34 catalyzer and ZSM-5 catalyzer, and the weight ratio of SAPO-34 catalyzer and ZSM-5 catalyzer is 0.1: 1 in the reactor, and SAPO-34 molecular sieve mass content is 70% in the SAPO-34 catalyzer, The ZSM-5 molecular sieve mass content in the ZSM-5 catalyst is 70%, and the SiO of the ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is 10, except the molecular sieve active component in the catalyst composition, the other components are mainly binder, and the activity index of the regenerated catalyst is 0.95...

Embodiment 2

[0024] According to the conditions and steps described in Example 1, methanol and naphtha enter the fluidized bed reactor in a ratio of 10:1 by weight, contact with the catalyst, and generate products including low carbon olefins, and simultaneously form the spent catalyst , the regenerated catalyst formed after the spent catalyst enters the regenerator for regeneration returns to the reactor to continue to participate in the reaction. Catalyst is the mixed catalyst of SAPO-34 catalyzer and ZSM-5 catalyzer, and the weight ratio of SAPO-34 catalyzer and ZSM-5 catalyzer is 10: 1 in the reactor, and SAPO-34 molecular sieve mass content is 10% in the SAPO-34 catalyzer, ZSM-5 molecular sieve mass content is 15% in the ZSM-5 catalyst, the SiO of ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is 100, except for the molecular sieve active component in the catalyst composition, the remaining components are mainly binders, and the activity index of the regenerated catalyst is 0.75....

Embodiment 3

[0026] According to the conditions and steps described in Example 1, methanol and naphtha enter the fluidized bed reactor in a ratio of 1:1 by weight, contact with the catalyst, generate products including light olefins, and simultaneously form the spent catalyst , the regenerated catalyst formed after the spent catalyst enters the regenerator for regeneration returns to the reactor to continue to participate in the reaction. Catalyst is the mixed catalyst of SAPO-34 catalyzer and ZSM-5 catalyzer, and the weight ratio of SAPO-34 catalyzer and ZSM-5 catalyzer is 1: 1 in the reactor, and SAPO-34 molecular sieve mass content is 40% in the SAPO-34 catalyzer, ZSM-5 molecular sieve mass content is 35% in the ZSM-5 catalyst, the SiO of ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is 60, except for the molecular sieve active component, the other components in the catalyst composition are mainly binders, and the activity index of the regenerated catalyst is 0.85. The fluidized ...

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Abstract

The invention relates to a method for preparing low-carbon olefins by using methanol and naphtha, mainly solving the problem of low yield of low-carbon olefins in the prior art. The method disclosed herein is characterized by letting a raw material containing methanol and naphtha enter into a fluidized bed reactor in a circulating fluidized bed reaction-regeneration system to contact with a catalyst to generate a product containing low-carbon olefins and simultaneously form a regeneration catalyst, letting the regeneration catalyst enter into a regenerator for regenerating to form a regenerated catalyst, letting the regenerated catalyst return to the reactor to continue participating in reaction, wherein the catalyst comprises a SAPO-34 catalyst and a ZSM-5 catalyst, the weight ratio of the SAPO-34 catalyst to the ZSM-5 catalyst is 0.1-10:1, the mass content of the SAPO-34 molecular sieves in the SAPO-34 catalyst is 10-70%, the mass content of the ZSM-5 molecular sieves in the ZSM-5 catalyst is 15-70%, and the activity index of the regenerated catalyst is larger than 0.75. The method disclosed herein well solves the problem and can be used in the industrial production of low-carbon olefins.

Description

technical field [0001] The invention relates to a method for producing light olefins from methanol and naphtha. technical background [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of light olefins are oxygenates, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated compounds can be converted from coal, natural gas, biomass and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20C10G11/18C10G11/05
CPCY02P20/584Y02P30/20Y02P30/40
Inventor 齐国祯王洪涛王莉王菊
Owner CHINA PETROLEUM & CHEM CORP
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