| 发明名称 |
PROCESS FOR TREATING AND RECOVERING PICKLING WASTE LIQUIDS FOR STAINLESS STEEL |
| 摘要 |
A process for treating and recovering pickling waste liquids used for the pickling of stainless steel such as nitric-hydrofluoric acid, nitric acid, hydrochloric acid and, sulfuric acid is disclosed, which comprises recovering the nitric-hydrofluoric acid and the iron oxide or metallic ion from the waste liquids of nitric-hydrofluoric acid and nitric acid by two solvent extraction processes and recovering the Cr and Ni containing ferrite from the waste liquids of sulfuric acid or hydrochloric acid by a ferrite formation process. When the waste acid is sulfuric acid, gypsum of a high purity can be obtained. |
| 申请公布号 |
DE3561387(D1) |
申请公布日期 |
1988.02.18 |
| 申请号 |
DE19853561387 |
申请日期 |
1985.03.25 |
| 申请人 |
KAWASAKI STEEL CORPORATION;RESEARCH DEVELOPMENT CORPORATION OF JAPAN |
发明人 |
UCHINO, KAZUHIRO C/O RESEARCH LABORATORIES;WATANABE, TOSHIO C/O RESEARCH LABORATORIES;NAKAZATO, YOSHIO C/O TOKYO HEAD OFFICE;HOSHINO, MINORU C/O CHIBA WORKS;ISHIHARA, NOBORU |
| 分类号 |
C02F1/26;B01D11/04;C01F11/46;C01G49/00;C01G53/00;C02F1/62;C23G1/36;(IPC1-7):C01G53/00 |
主分类号 |
C02F1/26 |
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