公开(公告)号：US11426702B2

公开(公告)日：2022-08-30

申请号：US17006723

申请日：2020-08-28

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Chunmao Chen ,  Zhichang Liu ,  Zhongjin Yi ,  Rui Zhang ,  Jiahao Liang ,  Xianghai Meng ,  Haiyan Liu ,  Chunming Xu ,  Qinghong Wang

IPC: C02F9/00 ,  C02F11/122 ,  C04B5/00 ,  C02F11/16 ,  B01J19/20 ,  C02F11/13 ,  C10G53/04 ,  C02F11/12 ,  C02F1/52 ,  C02F1/56 ,  C02F1/66 ,  C02F11/127 ,  C02F1/00 ,  C02F103/36 ,  C02F11/121

Abstract: 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.