公开(公告)号：US20220259696A1

公开(公告)日：2022-08-18

申请号：US17625444

申请日：2020-07-08

Applicant: Chevron U.S.A. Inc.

Inventor： Rahul Shankar Bhaduri ,  Bruce Edward Reynolds ,  Oleg A. Mironov ,  Alexander Kuperman ,  Woodrow K. Shiflett

IPC: C22B7/00 ,  C22B34/22 ,  C22B34/34

Abstract: An improved method for recovering metals from spent catalysts, particularly from spent slurry catalysts, is disclosed. The method and associated processes comprising the method are useful to recover catalyst metals used in the petroleum and chemical processing industries. The method generally involves a pyrometallurgical method and a hydrometallurgical method and includes forming a soda ash calcine of a caustic leach residue of the spent catalyst containing an insoluble Group VIII/Group VIB/Group VB metal compound combined with soda ash, and extracting and recovering soluble Group VIB metal and soluble Group VB metal compounds from the soda ash calcine.

公开(公告)号：US20230160037A1

公开(公告)日：2023-05-25

申请号：US17794157

申请日：2021-01-20

Applicant: Chevron U.S.A. Inc.

Inventor： Rahul Shankar Bhaduri ,  Bruce Edward Reynolds ,  Oleg A. Mironov ,  Alexander Kuperman ,  Woodrow K. Shiflett

IPC: C22B34/34 ,  C22B34/22 ,  C22B7/00 ,  C22B1/02

CPC classification number: C22B34/345 ,  C22B1/02 ,  C22B7/006 ,  C22B34/225

Abstract: An improved method for recovering metals from spent catalysts, particularly from spent slurry catalysts, is disclosed. The method and associated processes comprising the method are useful to recover spent catalyst metals used in the petroleum and chemical processing industries. The method generally involves a combination of a pyrometallurgical and a hydrometallurgical method and includes forming a potassium carbonate calcine of a KOH leach residue of the spent catalyst containing an insoluble Group VIIIB/Group VIB/Group VB metal compound combined with potassium carbonate, and extracting and recovering soluble Group VIB metal and soluble Group VB metal compounds from the potassium carbonate calcine.