JPS5451972A - Method of continuously treating sexivalent chrome - Google Patents
Method of continuously treating sexivalent chromeInfo
- Publication number
- JPS5451972A JPS5451972A JP11795177A JP11795177A JPS5451972A JP S5451972 A JPS5451972 A JP S5451972A JP 11795177 A JP11795177 A JP 11795177A JP 11795177 A JP11795177 A JP 11795177A JP S5451972 A JPS5451972 A JP S5451972A
- Authority
- JP
- Japan
- Prior art keywords
- sexivalent
- approx
- continuously treating
- oxidation
- held
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To precipitation separate sexivalent Cr as Cr(OH)3, by completely reducing sexivalent Cr by pouring a liquid containing Fe2+ so that the oxidation-reduction potential of the system be held in a limited range while specifying the pH of a solution or suspension containing sexivalent Cr.
CONSTITUTION: A liquid containing Fe2+ is poured so that the oxidation-reduction potential of the system be held to approx. -50W-150 mV -preferably, approx. -50W 100mV- of a solution or suspension containing sexivalent Cr in approx. 4.5W8.5 - prferably, approx. 5.5W7.2. Sexivalent Cr is reduced to trivalent Cr by the following reaction while being coagulation precipitated as Cr(OH)3. Cr6+ +3Fe2+ →Cr3+ +3Fe3+ Cr3+ +3OH- →Cr(OH)3 Fe3+ +3OH- →Fe(OH)3.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11795177A JPS5451972A (en) | 1977-10-03 | 1977-10-03 | Method of continuously treating sexivalent chrome |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11795177A JPS5451972A (en) | 1977-10-03 | 1977-10-03 | Method of continuously treating sexivalent chrome |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5451972A true JPS5451972A (en) | 1979-04-24 |
JPS6230838B2 JPS6230838B2 (en) | 1987-07-04 |
Family
ID=14724263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11795177A Granted JPS5451972A (en) | 1977-10-03 | 1977-10-03 | Method of continuously treating sexivalent chrome |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5451972A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4670244A (en) * | 1984-10-15 | 1987-06-02 | Hoechst Aktiengesellschaft | Process for reducing metal ions in aqueous solutions |
US5292435A (en) * | 1992-09-28 | 1994-03-08 | Klaus Schwitzgebel | Equipment and process for solid waste minimization in chromium and heavy metal removal from groundwater |
US5427692A (en) * | 1993-11-29 | 1995-06-27 | General Electric Company | Removal of chromium from solution using ferrous sulfate and barium nitrate |
US6607651B2 (en) | 1998-09-10 | 2003-08-19 | Cws Parts Company | Process and system for treating the discharge stream from an ion exchanger |
-
1977
- 1977-10-03 JP JP11795177A patent/JPS5451972A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4670244A (en) * | 1984-10-15 | 1987-06-02 | Hoechst Aktiengesellschaft | Process for reducing metal ions in aqueous solutions |
US5292435A (en) * | 1992-09-28 | 1994-03-08 | Klaus Schwitzgebel | Equipment and process for solid waste minimization in chromium and heavy metal removal from groundwater |
US5427692A (en) * | 1993-11-29 | 1995-06-27 | General Electric Company | Removal of chromium from solution using ferrous sulfate and barium nitrate |
US6607651B2 (en) | 1998-09-10 | 2003-08-19 | Cws Parts Company | Process and system for treating the discharge stream from an ion exchanger |
Also Published As
Publication number | Publication date |
---|---|
JPS6230838B2 (en) | 1987-07-04 |
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