Inventors:
Moinuddin Ahmed - Hercules CA, US
Huping Luo - Richmond CA, US
Krishniah Parimi - Alamo CA, US
Bong-Kyu Chang - Novato CA, US
Sara Lindsay - Houston TX, US
Assignee:
Chevron U.S.A. Inc. - San Ramon CA
International Classification:
C07C 2/08
B01J 20/34
B01J 27/132
B01J 27/135
B01J 27/138
B01J 27/06
B01J 31/00
C07C 45/46
US Classification:
585311, 502 21, 502150, 502155, 502167, 502224, 502226, 502227, 502228, 585438
Abstract:
Disclosed herein are processes in which precipitation permits removal of metal halides (e. g. AlCl) from ionic liquids. After precipitation, the precipitated metal halides can be physically separated from the bulk ionic liquid. More effective precipitation can be achieved through cooling or the combination of cooling and the provision of metal halide seed crystals. The ionic liquids can be regenerated ionic liquid catalysts, which contain excess metal halides after regeneration. Upon removal of the excess metal halides, they can be reused in processes using ionic liquid catalysts, such as alkylation processes.