公开(公告)号：WO2021074904A1

公开(公告)日：2021-04-22

申请号：PCT/IB2020/059809

申请日：2020-10-19

Applicant: NUVEST RECOVERY SOLUTIONS (PTY) LTD

Inventor： PRETORIUS, Arthur ,  TUNNICLIFFE, Ian

IPC: C23G1/36 ,  C01G49/10 ,  C01G49/14 ,  C23G1/08

Abstract: This invention relates to a pickling process carried out in a pickling tank (11). Pickling solution comprising hydrochloric acid containing ferric chloride is removed from the pickling tank (11) hydrochloric acid is added to the pickling tank. The removed solution (12) is treated with sulphuric acid (22) to obtain a solution (24) comprising regenerated hydrochloric acid containing ferrous sulphate; obtaining a ferrous sulphate precipitate product (34); and recycling regenerated hydrochloric acid solution (16) to the pickling tank (11).