Method and system for treatment of spent chloroaluminate ionic liquid catalyst and alkaline wastewater

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United States of America Patent

PATENT NO 11426702
APP PUB NO 20200392029A1
SERIAL NO

17006723

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A method and a system for treatment of a spent chloroaluminate ionic liquid catalyst and an alkaline wastewater, where the method includes: 1) mixing the catalyst with a concentrated brine for hydrolysis reaction until residual activity of the catalyst is completely eliminated, to obtain an acidic hydrolysate and an acid-soluble oil; 2) mixing the acidic hydrolysate with an alkaline solution containing the alkaline wastewater for neutralization reaction until this reaction system becomes weak alkaline, to obtain a neutralization solution; 3) fully mixing the neutralization solution with a flocculant, carrying out sedimentation and separation, collecting the concentrated brine at an upper layer for reuse in the hydrolysis reaction, and collecting concentrated flocs at a lower layer; 4) dehydrating the concentrated flocs to obtain concentrated brine for reuse into the hydrolysis reaction, and collecting a wet solid slag; and 5) drying the wet solid slag to obtain a dry solid slag.

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Patent Owner(s)

Patent OwnerAddress
CHINA UNIVERSITY OF PETROLEUM-BEIJINGBEIJING CITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Chunmao Beijing, CN 1 0
Liang, Jiahao Beijing, CN 2 0
Liu, Haiyan Beijing, CN 50 63
Liu, Zhichang Beijing, CN 32 201
Meng, Xianghai Beijing, CN 18 61
Wang, Qinghong Beijing, CN 2 0
Xu, Chunming Beijing, CN 36 302
Yi, Zhongjin Beijing, CN 1 0
Zhang, Rui Beijing, CN 806 5113

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