公开(公告)号：US20230257280A1

公开(公告)日：2023-08-17

申请号：US17744018

申请日：2022-05-13

Applicant: Chevron U.S.A. Inc.

Inventor： Rahul Shankar BHADURI ,  Oleg A. MIRONOV ,  Alexander E. KUPERMAN

IPC: C01G39/02 ,  C01G39/00 ,  C01G31/00 ,  C22B7/00

CPC classification number: C01G39/02 ,  C01G39/006 ,  C01G31/006 ,  C22B7/009

Abstract: An improved method for recovering metals from spent supported catalysts, including spent supported hydroprocessing catalysts. The method and associated processes comprising the method are useful to recover spent supported 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 from the spent supported catalyst containing Group VIIIB/Group VIB/Group VB metal compound(s) combined with potassium carbonate, and extracting and recovering soluble Group VIB metal and soluble Group VB metal compounds from the potassium carbonate calcine.