US 11,938,468 B2
Catalyst system for producing cyclic carbonates and method related thereto
Taradon Piromchart, Bangkok (TH); and Valerio D'Elia, Rayong (TH)
Assigned to PTT EXPLORATION AND PRODUCTION PUBLIC COMPANY LIMITED, Bangkok (TH)
Filed by PTT EXPLORATION AND PRODUCTION PUBLIC COMPANY LIMITED, Bangkok (TH)
Filed on Mar. 18, 2021, as Appl. No. 17/206,080.
Application 17/206,080 is a continuation of application No. PCT/TH2019/000042, filed on Sep. 18, 2019.
Claims priority of provisional application 62/732,987, filed on Sep. 18, 2018.
Prior Publication US 2021/0346877 A1, Nov. 11, 2021
Int. Cl. B01J 31/02 (2006.01); B01J 21/08 (2006.01); B01J 23/18 (2006.01); B01J 31/12 (2006.01); B01J 35/12 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); C07F 7/18 (2006.01); C07D 317/36 (2006.01)
CPC B01J 31/0268 (2013.01) [B01J 21/08 (2013.01); B01J 23/18 (2013.01); B01J 31/0239 (2013.01); B01J 31/0279 (2013.01); B01J 31/0298 (2013.01); B01J 31/121 (2013.01); B01J 35/12 (2013.01); B01J 37/04 (2013.01); B01J 37/08 (2013.01); C07F 7/1804 (2013.01); C07D 317/36 (2013.01)] 19 Claims
 
1. A catalyst system for producing cyclic carbonates comprising:
a pre-catalyst, which is BiCl3 having amounts in the range from 5 to 10% by weight of silica support;
a compound having formula (I)

OG Complex Work Unit Chemistry
wherein:
Y is selected from bromide (Br−) or iodide (I−);
R1, R2, and R3 are methyl group or R1,R2, and R3 are taken together to form a heteroaryl ring having formula (II)

OG Complex Work Unit Chemistry
and
a silica (SiO2) support.