Catalyst for preparing ethylbenzene from ethanol and benzene, preparation therefor and use thereof
AssigneeDalian Institute of Chemical Physics, Chinese Academy of Sciences
InventorsXiong Su, Xiaoli Yang, Yanqiang Huang, Tao Zhang
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Abstract
Disclosed is a catalyst for producing ethylbenzene in one-step by vapor phase alkylation reaction of ethanol and benzene. The catalyst has the following features for the reaction: high alkylation reaction activity, high selectivity of ethylbenzene in an alkylation product, high hydrothermal stability and stable catalytic performance. The catalyst comprises a mesoporous-microporous composite TNU-9 molecular sieve and the silicon to aluminum molar ratio, SiO2/Al2O3, of the meso-microporous composite TNU-9 molecular sieve ranges from 50 to 200.
Claims17
A method for producing ethylbenzene by vapor-phase alkylation of ethanol and benzene comprising the following steps:
- feeding raw materials comprising benzene and ethanol to a fixed bed reactor loaded with a molecular sieve catalyst to react to obtain ethylbenzene;
- wherein the molecular sieve catalyst is mesoporous-microporous composite TNU-9 molecular sieve, wherein a silica to alumina molar ratio, SiO2/Al2O3, of the mesoporous-microporous composite TNU-9 molecular sieve ranges from 50 to 200;
- wherein the mesoporous-microporous composite TNU-9 molecular sieve comprises a mesopore channel, a diameter of which ranges from 3 to 50 nm;
- a reaction temperature ranges from 300 to 500° C., a reaction pressure ranges from 0.1 to 2 MPa, a molar ratio of benzene to ethanol in the raw materials ranges from 3:1 to 7:1, and a weight hourly space velocity of the raw materials ranges from 3 to 8 h−1.
Dependencies are inferred from the claim text.