US 12,030,830 B1
Method of preparing olefins from methanol
Jie Fan, Hangzhou (CN); Baohui Lou, Hangzhou (CN); Yue Wang, Hangzhou (CN); and Shihui Zou, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed on Dec. 19, 2023, as Appl. No. 18/545,426.
Application 18/545,426 is a continuation of application No. PCT/CN2023/094587, filed on May 16, 2023.
Claims priority of application No. 202310399567.X (CN), filed on Apr. 14, 2023.
Int. Cl. C07C 1/20 (2006.01); B01J 21/04 (2006.01); B01J 21/10 (2006.01); B01J 29/08 (2006.01); B01J 29/40 (2006.01); B01J 29/70 (2006.01); B01J 29/85 (2006.01); C07C 1/22 (2006.01)
CPC C07C 1/22 (2013.01) [B01J 21/04 (2013.01); B01J 21/10 (2013.01); B01J 29/082 (2013.01); B01J 29/084 (2013.01); B01J 29/40 (2013.01); B01J 29/7007 (2013.01); B01J 29/85 (2013.01); C07C 2529/08 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of preparing olefins from methanol, comprising:
taking the methanol and phenol molecules as raw materials;
gasifying the raw materials and passing into a two-stage fixed-bed catalytic reactor under an anaerobic environment, such that ethylene is generated after a reaction,
wherein the reaction lasts for 100 hours;
wherein the two-stage fixed-bed catalytic reactor comprises a first constant-temperature zone and a second constant-temperature zone in an order from an inlet to an outlet,
wherein the first constant-temperature zone is at a temperature of 300° C. to 400° C.,
wherein the second constant-temperature zone is at a temperature of 160° C. to 400° C.;
placing a catalyst A in the first constant-temperature zone; and
placing a catalyst B is placed in the second constant-temperature zone;
wherein the catalyst A is a silica-aluminum molecular sieve;
wherein the catalyst B is a silica-aluminum molecular sieve or a phosphorus-aluminum molecular sieve; and
wherein the phenol molecules represented by a structural formula as listed below:

OG Complex Work Unit Chemistry
wherein R1-R5 are independently selected from one of H atom, alkyl, alkoxy, phenol hydroxyl, alcohol hydroxyl,

OG Complex Work Unit Chemistry
halogen, respectively; and R′ is selected from one of H atom, hydroxyl, alkoxy, alkyl, and amino.