GB376661A - Process for the manufacture of alkali dichromates - Google Patents
Process for the manufacture of alkali dichromatesInfo
- Publication number
- GB376661A GB376661A GB2540/32A GB254032A GB376661A GB 376661 A GB376661 A GB 376661A GB 2540/32 A GB2540/32 A GB 2540/32A GB 254032 A GB254032 A GB 254032A GB 376661 A GB376661 A GB 376661A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- oxidation
- excess
- constituent
- instance
- 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
- 239000003513 alkali Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 239000011651 chromium Substances 0.000 abstract 2
- 239000000470 constituent Substances 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000002585 base Substances 0.000 abstract 1
- 229910000423 chromium oxide Inorganic materials 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical group [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000000376 reactant Substances 0.000 abstract 1
- 239000011541 reaction mixture Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Alkali dichromates, for instance sodium dichromate, are obtained by oxidation by a dry process above 300 DEG C. and under pressure of a mixture of chromium oxide or substances containing it or of metallic chromium or its alloys with the requisite amount of the necessary base or mono-chromate. Oxygen or air is preferably used for the oxidation and the pressure is such that decomposition of dichromate is avoided. Excess of the chromium constituent may be used to prevent fusion, such excess being returned to the process. When monochromate is a constituent of the reaction mixture intimate admixture of the reactants may be effected by subjecting them to a preliminary reducing treatment, for instance with hydrogen at 400 DEG C. In examples temperatures of 300-500 DEG C. and pressures up to 5 kgs. are used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR376661X | 1931-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376661A true GB376661A (en) | 1932-07-14 |
Family
ID=8895058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2540/32A Expired GB376661A (en) | 1931-03-21 | 1932-01-27 | Process for the manufacture of alkali dichromates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB376661A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279804A (en) * | 1991-04-26 | 1994-01-18 | Occidental Chemical Corporation | Vanadium removal in aqueous streams |
-
1932
- 1932-01-27 GB GB2540/32A patent/GB376661A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279804A (en) * | 1991-04-26 | 1994-01-18 | Occidental Chemical Corporation | Vanadium removal in aqueous streams |
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