Method for converting methanol into propylene
A technology of methanol conversion and methanol, which is applied in organic chemistry, hydrocarbon cracking, production of bulk chemicals, etc., can solve the problems of low propylene selectivity and discontinuous production, and improve propylene selectivity, increase raw material processing capacity, Achieving a continuous effect
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[0055] Example 1
[0056] The catalyst used in this example is a ZSM-5 molecular sieve spherical catalyst with a particle size of 1.6mm-2mm, and the raw material used is methanol.
[0057] The methanol reaction zone adopts a moving bed reactor with an inlet temperature of 250°C and normal pressure operation.
[0058] The first reaction zone adopts three moving bed reactors, each inlet temperature is 500 ℃, normal pressure operation, the mixture of methanol, dimethyl ether and water is divided into three reactant streams by weight ratio 1: 1.4: 1.8; cold shock liquid adopts methanol .
[0059] The second reaction zone adopts a moving bed reactor with an inlet temperature of 525°C and normal pressure operation.
[0060] The carbon deposition amount of the carbon deposition catalyst removed from the bottom of the catalyst bed is less than 2%, and it is sent to the regenerator for regeneration. ).
[0061] Other operations are the same as the above-mentioned embodiments.
[0...
Example Embodiment
[0070] Example 2
[0071] The catalyst used in this example is a ZSM-5 molecular sieve spherical catalyst with a particle size of 1.6mm-2mm, and the raw material used is methanol.
[0072] The methanol reaction zone adopts two moving bed reactors, each with an inlet temperature of 280°C and normal pressure operation.
[0073] The first reaction zone adopts four moving bed reactors, each with an inlet temperature of 450°C, operating at normal pressure, and the mixture of methanol, dimethyl ether and water is divided into four reactant streams in a weight ratio of 1:1.4:1.8:1.2; A mixture of methanol and water is used.
[0074] The second reaction zone adopts a moving bed reactor with an inlet temperature of 465°C and normal pressure operation.
[0075] The carbon deposition amount of the carbon deposition catalyst removed from the bottom of the catalyst bed is less than 2%, and it is sent to the regenerator for regeneration. ).
[0076] Other operations are the same as in E...
Example Embodiment
[0084] Example 3
[0085] The catalyst used in this example is a ZSM-5 molecular sieve spherical catalyst with a particle size of 2mm-3mm, and the raw material used is methanol.
[0086] The methanol reaction zone adopts a moving bed reactor, the temperature of each inlet is 300°C, and the operation is normal pressure.
[0087] The first reaction zone adopts three moving bed reactors, each inlet temperature is 450 ° C, normal pressure operation, the mixture of methanol, dimethyl ether and water is divided into three reactant streams by weight ratio 1: 1.4: 1.8; cold shock liquid adopts methanol Mixture with water.
[0088] The second reaction zone adopts a moving bed reactor with an inlet temperature of 480°C and normal pressure operation.
[0089] The carbon deposition amount of the carbon deposition catalyst removed from the bottom of the catalyst bed is less than 2%, and it is sent to the regenerator for regeneration. ).
[0090] Other operations are the same as in Exam...
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