发明授权
- 专利标题： Process for treating and recovering pickling waste liquids for stainless steel
- 专利标题（中）： 用于处理和回收不锈钢酸洗废液的方法
-
申请号： US713870申请日： 1985-03-20
-
公开(公告)号： US4565675A公开(公告)日： 1986-01-21
- 发明人: Kazuhiro Uchino , Toshio Watanabe , Yoshio Nakazato , Minoru Hoshino , Noboru Ishihara
- 申请人： Kazuhiro Uchino , Toshio Watanabe , Yoshio Nakazato , Minoru Hoshino , Noboru Ishihara
- 申请人地址： JPX Kobe JPX Tokyo JPX Tokyo
- 专利权人： Kawasaki Steel Corporation,Research Development Corporation,Solex Research Corporation of Japan
- 当前专利权人： Kawasaki Steel Corporation,Research Development Corporation,Solex Research Corporation of Japan
- 当前专利权人地址： JPX Kobe JPX Tokyo JPX Tokyo
- 优先权： JPX59-62435 19840330
- 主分类号： C02F1/26
- IPC分类号： C02F1/26 ; B01D11/04 ; C01F11/46 ; C01G49/00 ; C01G53/00 ; C02F1/62 ; C23G1/36 ; C01G49/02 ; C01G37/02 ; C01G53/04
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.
公开/授权文献
信息查询
