JPS57135724A - Reduction of hexavalent chromium - Google Patents
Reduction of hexavalent chromiumInfo
- Publication number
- JPS57135724A JPS57135724A JP1968181A JP1968181A JPS57135724A JP S57135724 A JPS57135724 A JP S57135724A JP 1968181 A JP1968181 A JP 1968181A JP 1968181 A JP1968181 A JP 1968181A JP S57135724 A JPS57135724 A JP S57135724A
- Authority
- JP
- Japan
- Prior art keywords
- oil shale
- waste oil
- acid
- trivalent
- hexavalent
- 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
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
PURPOSE: To reduce hexavalent chromium into trivalent Cr in a short time, by bringing waste oil shale powder or a material obtained treating it with an acid into contact with a waste liquor containing hexavalent Cr.
CONSTITUTION: Waste oil shale is added to industrial waste water containing harmful hexavalent Cr, which is converted into harmless trivalent Cr. The waste oil shale to be used is obtained by adjusting the residue prepared by extracting synthetic petroleum from oil shale into particle sizes of -100W+200mesh or treating the waste oil shale with an acid of 2NHCl solution at 50°C for 8hr, followed by washing with water and drying at 100°C. Especially the latter, the waste oil shale treated with an acid can promote the reduction in a shorter time, reduce hexavalent Cr into trivalent Cr in high reduction ratio.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1968181A JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1968181A JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57135724A true JPS57135724A (en) | 1982-08-21 |
JPS6038341B2 JPS6038341B2 (en) | 1985-08-31 |
Family
ID=12005971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1968181A Expired JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6038341B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5571489A (en) * | 1995-01-27 | 1996-11-05 | Illinois Institute Of Technology | Process for chromium recovery from aqueous solutions |
US20150166411A1 (en) * | 2012-07-06 | 2015-06-18 | Lanxess Deutschland Gmbh | Method for reducing hexavalent chromium in oxidic solids |
CN114853372A (en) * | 2022-03-31 | 2022-08-05 | 铁岭大伙房水泥有限责任公司 | Low-chromium cement clinker combined by oil shale slag and stainless steel slag and preparation method thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0214545U (en) * | 1988-07-08 | 1990-01-30 |
-
1981
- 1981-02-13 JP JP1968181A patent/JPS6038341B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5571489A (en) * | 1995-01-27 | 1996-11-05 | Illinois Institute Of Technology | Process for chromium recovery from aqueous solutions |
US20150166411A1 (en) * | 2012-07-06 | 2015-06-18 | Lanxess Deutschland Gmbh | Method for reducing hexavalent chromium in oxidic solids |
US9725364B2 (en) * | 2012-07-06 | 2017-08-08 | Lanxess Deutschland Gmbh | Method for reducing hexavalent chromium in oxidic solids |
CN114853372A (en) * | 2022-03-31 | 2022-08-05 | 铁岭大伙房水泥有限责任公司 | Low-chromium cement clinker combined by oil shale slag and stainless steel slag and preparation method thereof |
CN114853372B (en) * | 2022-03-31 | 2024-04-09 | 铁岭大伙房水泥有限责任公司 | Low-chromium cement clinker combining oil shale slag and stainless steel slag and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6038341B2 (en) | 1985-08-31 |
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