GB580181A - Process for the production of chromic hydroxide - Google Patents
Process for the production of chromic hydroxideInfo
- Publication number
- GB580181A GB580181A GB2038243A GB2038243A GB580181A GB 580181 A GB580181 A GB 580181A GB 2038243 A GB2038243 A GB 2038243A GB 2038243 A GB2038243 A GB 2038243A GB 580181 A GB580181 A GB 580181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydroxide
- potassium
- class
- sodium
- chromic hydroxide
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Sodium or potassium monochromate solutions are reduced with sodium or potassium monosulphide, yielding chromic hydroxide, alkali sulphate and alkali hydroxide. The latter is separated and used in known methods of chromate production or other well-known technical applications, if desired after conversion to carbonate, bicarbonate, acetate or the like. The precipitated chromic hydroxide may be ignited e.g. at 900 DEG C. to yield a pigment or converted into soluble chromium salts by adding the appropriate acid. The Specification as open to inspection under Section 91 describes also the reduction of chromates and dichromates of ammonium, calcium, strontium, barium, magnesium or lead by sulphides, or their oxidation products, e.g., thiosulphates or polythionates. This subject matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 18,743/98, [Class 41], and 336,671, [Class 1 (iii)]
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2038243A GB580181A (en) | 1943-12-06 | 1943-12-06 | Process for the production of chromic hydroxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2038243A GB580181A (en) | 1943-12-06 | 1943-12-06 | Process for the production of chromic hydroxide |
Publications (1)
Publication Number | Publication Date |
---|---|
GB580181A true GB580181A (en) | 1946-08-29 |
Family
ID=10145027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2038243A Expired GB580181A (en) | 1943-12-06 | 1943-12-06 | Process for the production of chromic hydroxide |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB580181A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100345768C (en) * | 2006-03-10 | 2007-10-31 | 锦州铁合金股份有限公司 | Method for treating chromium hydroxide |
CN112110487A (en) * | 2020-09-22 | 2020-12-22 | 攀钢集团研究院有限公司 | Preparation method of easily soluble chromium hydroxide |
-
1943
- 1943-12-06 GB GB2038243A patent/GB580181A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100345768C (en) * | 2006-03-10 | 2007-10-31 | 锦州铁合金股份有限公司 | Method for treating chromium hydroxide |
CN112110487A (en) * | 2020-09-22 | 2020-12-22 | 攀钢集团研究院有限公司 | Preparation method of easily soluble chromium hydroxide |
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