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Method for partially regenerating catalyst of methanol to olefin and method of methanol to olefin

A technology for producing olefins from methanol and regenerating catalysts, which is applied in molecular sieve catalysts, chemical instruments and methods, catalyst regeneration/reactivation, etc., can solve problems such as unfavorable environmental protection, reduce the utilization rate of carbon atoms of methanol, and achieve the effect of improving the utilization rate.

Active Publication Date: 2019-06-11
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

However, this method produces large amounts of the greenhouse gas CO 2 , is not conducive to environmental protection, and reduces the utilization rate of methanol carbon atoms

Method used

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  • Method for partially regenerating catalyst of methanol to olefin and method of methanol to olefin
  • Method for partially regenerating catalyst of methanol to olefin and method of methanol to olefin
  • Method for partially regenerating catalyst of methanol to olefin and method of methanol to olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Pack 4g of commercially used methanol-to-olefins catalyst SAPO-34 into a fixed fluidized bed reactor to carry out the reaction of methanol to olefins. The reaction raw material is an aqueous methanol solution with a concentration of 80wt%, the reaction temperature is 490°C, and the pressure is 0.1MPa. The speed is 2.1h -1 . After the catalyst was deactivated, the amount of carbon deposited on the deactivated catalyst was measured and found to be 9.18%.

[0054] After the catalyst is deactivated, nitrogen gas with a flow rate of 100mL / min is introduced into the reactor for purging, and the temperature of the reactor heating furnace is set; speed is 6h -1 , constant temperature for 15 minutes. After steam gasification, take a small amount of catalyst and measure the amount of carbon deposition. The amount of carbon deposition is 5.95%. After the temperature program is completed, the regeneration is stopped, and the regeneration gas is switched to nitrogen gas. When the...

Embodiment 2

[0056] Pack 4g of commercially used methanol-to-olefins catalyst SAPO-34 into a fixed fluidized bed reactor to carry out the reaction of methanol to olefins. The reaction raw material is an aqueous methanol solution with a concentration of 80wt%, the reaction temperature is 490°C, and the pressure is 0.1MPa. The speed is 2.1h -1 . After the catalyst was deactivated, the amount of carbon deposited on the deactivated catalyst was measured and found to be 11.88%.

[0057] After the catalyst is deactivated, nitrogen gas with a flow rate of 100mL / min is introduced into the reactor for purging, and the temperature of the reactor heating furnace is set; speed is 6h -1 , constant temperature for 30min. After the steam gasification is completed, take a small amount of catalyst and measure the amount of carbon deposition. The amount of carbon deposition is 4.82%. After the temperature program is completed, the regeneration is stopped, and the regeneration gas is switched to nitrogen ...

Embodiment 3

[0059] Pack 4g of commercially used methanol-to-olefins catalyst SAPO-34 into a fixed fluidized bed reactor to carry out the reaction of methanol to olefins. The reaction raw material is an aqueous methanol solution with a concentration of 80wt%, the reaction temperature is 490°C, and the pressure is 0.1MPa. The speed is 2.1h -1 . After the catalyst is deactivated, the amount of carbon deposited on the deactivated catalyst is measured, which is 7.08%

[0060] After the catalyst is deactivated, nitrogen gas with a flow rate of 100mL / min is introduced into the reactor for purging, and the temperature of the reactor heating furnace is set; speed is 6h -1 , constant temperature for 10 minutes. After the steam gasification is completed, take a small amount of catalyst and measure the amount of carbon deposition. The amount of carbon deposition is 5.16%. After the temperature program is completed, the regeneration is stopped, and the regeneration gas is switched to nitrogen gas. ...

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Abstract

The present application discloses a method for partially regenerating a catalyst of methanol to an olefin. The method comprises the following steps: placing the deactivated catalyst of the methanol tothe olefin in a regenerator, and performing a partial regeneration reaction to obtain a regenerated catalyst, wherein at least a portion of the regenerated catalyst has a carbon deposition amount ofmore than 1%. The present application discloses a method of the methanol to the olefin, a reaction of the methanol to the olefin is performed in a fluidized bed by adopting the catalyst of the methanol to the olefin, and the method is characterized in that at least a portion of the regenerated catalyst has the carbon deposition amount of more than 1%.

Description

technical field [0001] The application relates to a method for partially regenerating a methanol-to-olefins catalyst and a regenerated catalyst, which belong to the field of chemical catalysts. Background technique [0002] Ethylene and propylene are important basic raw materials for the national economy and occupy an important strategic position in the development of petrochemical and chemical industries. The raw material for ethylene production in my country is mainly naphtha, and its cost is relatively high. The industrial methanol-to-olefins technology starts from coal, uses SAPO catalysts, and adopts a fluidized bed process to successfully prepare low-carbon olefins with high selectivity. However, after a period of reaction, the SAPO catalyst will be deactivated due to carbon deposition, and it needs to be regenerated by burning charcoal to restore the activity and selectivity of the catalyst. In the prior art, the regeneration process of methanol to olefins catalyst ...

Claims

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Application Information

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IPC IPC(8): B01J29/90B01J38/06C07C1/20C07C11/02C07C11/04C07C11/06
CPCY02P20/584Y02P20/52Y02P30/20Y02P30/40
Inventor 叶茂周吉彬张涛张今令赵银峰王贤高贾金明唐海龙刘中民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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