GB364361A - Process for the manufacture of chromates and dichromates - Google Patents
Process for the manufacture of chromates and dichromatesInfo
- Publication number
- GB364361A GB364361A GB2343/31A GB234331A GB364361A GB 364361 A GB364361 A GB 364361A GB 2343/31 A GB2343/31 A GB 2343/31A GB 234331 A GB234331 A GB 234331A GB 364361 A GB364361 A GB 364361A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali
- air
- oxygen
- dichromates
- alkaline
- 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
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- 239000003513 alkali Substances 0.000 abstract 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 3
- 230000003647 oxidation Effects 0.000 abstract 3
- 238000007254 oxidation reaction Methods 0.000 abstract 3
- 229910052760 oxygen Inorganic materials 0.000 abstract 3
- 239000001301 oxygen Substances 0.000 abstract 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 2
- 239000003518 caustics Substances 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 230000001590 oxidative effect Effects 0.000 abstract 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 abstract 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- -1 alkaline-earth metal chromates Chemical class 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 239000008346 aqueous phase Substances 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000011651 chromium Substances 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 239000004323 potassium nitrate Substances 0.000 abstract 1
- 235000010333 potassium nitrate Nutrition 0.000 abstract 1
- 159000000000 sodium salts Chemical class 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/14—Chromates; Bichromates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compounds Of Iron (AREA)
Abstract
Alkali and alkaline-earth metal chromates and dichromates are obtained by the aqueous phase oxidation of chromium or its alloys in the presence of alkalies or alkaline-earths by the use of oxidizing gases (oxygen or air) under pressure at temperatures of say 150-300 DEG C. Caustic alkalies, alkali carbonates or bicarbonates particularly the sodium salts, and lime are the specified alkaline reagents, but in the production of dichromates they may be replaced by the corresponding chromates. When carbon dioxide is produced in the reaction, as when an alkali carbonate is employed, it is either removed in the gas current or in working in closed autoclaves chemically bound, as by the addition of lime. Ozonized oxygen or air, and halogens are also specified for use as oxidizing agents. A statement of the art refers inter alia to oxidation of ferrochrome by treatment with fused caustic alkali or with alkali carbonate and saltpetre, or by heating above 1000 DEG C. with alkali carbonate. The Specification as open to inspection under Sect. 91 (3) (a) is not limited to the use for oxidation of oxidizing gases under pressure. Hydrogen peroxide may be used, and ferricyanides be added when air or oxygen is employed. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR710771T | 1930-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB364361A true GB364361A (en) | 1932-01-07 |
Family
ID=9073021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2343/31A Expired GB364361A (en) | 1930-05-09 | 1931-01-23 | Process for the manufacture of chromates and dichromates |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1955326A (en) |
| CH (1) | CH156745A (en) |
| DE (1) | DE547422C (en) |
| FR (1) | FR710771A (en) |
| GB (1) | GB364361A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2754173A (en) * | 1956-07-10 | Method of manufacturing chromium | ||
| US2430261A (en) * | 1942-01-26 | 1947-11-04 | Marvin J Udy | Production of chromium compounds |
| US2493789A (en) * | 1948-08-14 | 1950-01-10 | Marvin J Udy | Production of chromate |
| US2494215A (en) * | 1949-05-12 | 1950-01-10 | Marvin J Udy | Chromate production |
| US3403970A (en) * | 1964-06-02 | 1968-10-01 | Union Carbide Corp | Process for preparing chromates |
| US3393972A (en) * | 1964-06-09 | 1968-07-23 | Marathon Oil Co | Method for preparing ammonium chromate |
| US3369861A (en) * | 1964-10-09 | 1968-02-20 | Marathon Oil Co | Method for producing ammonium chromate |
| WO2012058801A1 (en) * | 2010-11-02 | 2012-05-10 | 天津派森科技有限责任公司 | A hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome |
| CN102897838B (en) * | 2012-11-19 | 2014-12-10 | 四川省银河化学股份有限公司 | One-step preparation method of sodium bichromate |
-
1930
- 1930-05-09 FR FR710771D patent/FR710771A/en not_active Expired
- 1930-05-29 DE DE1930547422D patent/DE547422C/en not_active Expired
-
1931
- 1931-01-23 GB GB2343/31A patent/GB364361A/en not_active Expired
- 1931-01-30 US US512506A patent/US1955326A/en not_active Expired - Lifetime
- 1931-03-06 CH CH156745D patent/CH156745A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH156745A (en) | 1932-08-31 |
| US1955326A (en) | 1934-04-17 |
| DE547422C (en) | 1932-03-23 |
| FR710771A (en) | 1931-08-28 |
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