JPS56149327A - Manufacture of fine chromium oxide - Google Patents
Manufacture of fine chromium oxideInfo
- Publication number
- JPS56149327A JPS56149327A JP5041080A JP5041080A JPS56149327A JP S56149327 A JPS56149327 A JP S56149327A JP 5041080 A JP5041080 A JP 5041080A JP 5041080 A JP5041080 A JP 5041080A JP S56149327 A JPS56149327 A JP S56149327A
- Authority
- JP
- Japan
- Prior art keywords
- chromium
- chromium oxide
- hydroxide
- washing
- precipitate
- 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 obtain fine chromium oxide having low crystallinity and suitable for use as ceramic material, etc. by allowing an alkali to act on an aqueous soln. of a trivalent chromium salt, calcining the resulting chromium hydroxide by heating, and washing the product.
CONSTITUTION: An alkali agent such as potassium hydroxide is added to an aqueous soln. of a trivalent chromium salt and reacted at about 5W9pH to precipitate chromium hydroxide, which is then separated by solid-liq. separation. The precipitate with salts adsorbed is heated to ≤450°C without washing, and the calcined product is washed to remove the salts as impurities. By this method fine active chromium oxide of relatively high purity is obtd. easily.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5041080A JPS5938170B2 (en) | 1980-04-18 | 1980-04-18 | Manufacturing method of fine chromium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5041080A JPS5938170B2 (en) | 1980-04-18 | 1980-04-18 | Manufacturing method of fine chromium oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56149327A true JPS56149327A (en) | 1981-11-19 |
| JPS5938170B2 JPS5938170B2 (en) | 1984-09-14 |
Family
ID=12858087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5041080A Expired JPS5938170B2 (en) | 1980-04-18 | 1980-04-18 | Manufacturing method of fine chromium oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5938170B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589820A (en) * | 1981-06-24 | 1983-01-20 | フアイザ− ピツグメンツ インコ−ポレ−テツド | Manufacture of pigment chromium oxide |
| KR20000039860A (en) * | 1998-12-16 | 2000-07-05 | 이구택 | Preparation method of cr(oh)3 which does not contain so4^2-, cr(oh)3 prepared therefrom, and preparation method of chromium oxide which does not generate sox, using cr(oh)3 |
| WO2010026886A1 (en) * | 2008-09-05 | 2010-03-11 | 日本化学工業株式会社 | Process for production of chromium hydroxide |
-
1980
- 1980-04-18 JP JP5041080A patent/JPS5938170B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589820A (en) * | 1981-06-24 | 1983-01-20 | フアイザ− ピツグメンツ インコ−ポレ−テツド | Manufacture of pigment chromium oxide |
| KR20000039860A (en) * | 1998-12-16 | 2000-07-05 | 이구택 | Preparation method of cr(oh)3 which does not contain so4^2-, cr(oh)3 prepared therefrom, and preparation method of chromium oxide which does not generate sox, using cr(oh)3 |
| WO2010026886A1 (en) * | 2008-09-05 | 2010-03-11 | 日本化学工業株式会社 | Process for production of chromium hydroxide |
| EP2322480A4 (en) * | 2008-09-05 | 2012-01-18 | Nippon Chemical Ind | Process for production of chromium hydroxide |
| JPWO2010026886A1 (en) * | 2008-09-05 | 2012-02-02 | 日本化学工業株式会社 | Method for producing chromium hydroxide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5938170B2 (en) | 1984-09-14 |
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