C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 17/90 (2006.01) B01D 11/04 (2006.01) C01B 17/96 (2006.01) C01G 23/00 (2006.01) C22B 34/12 (2006.01)
Patent
CA 2082256
Abstract of the Disclosure PROCESS FOR RECOVERING SULFURIC ACID FROM METALLIC SULFATE-CONTAINING EXHAUST SULFURIC ACID In order to efficiently and easily recover a spent sulfuric acid exhausted, for example, in an acid washing liquid or in producing titanium dioxide by a sulfate method in a large amount, as highly concentrated sulfuric acid, bivalent iron ions in the spent sulfuric acid containing metal sulfate are first oxidized into trivalent iron ions, hydrochloric acid is added to such a liquid and then solvent extraction is carried out.
Iyatomi Nobuyoshi
Mikami Yasuie
Nittetsu Mining Co. Ltd.
Ridout & Maybee Llp
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