RU2007121683A - METHOD FOR PRODUCING CHROMIUM ANHYDRIDE - Google Patents
METHOD FOR PRODUCING CHROMIUM ANHYDRIDE Download PDFInfo
- Publication number
- RU2007121683A RU2007121683A RU2007121683/15A RU2007121683A RU2007121683A RU 2007121683 A RU2007121683 A RU 2007121683A RU 2007121683/15 A RU2007121683/15 A RU 2007121683/15A RU 2007121683 A RU2007121683 A RU 2007121683A RU 2007121683 A RU2007121683 A RU 2007121683A
- Authority
- RU
- Russia
- Prior art keywords
- sulfuric acid
- leaching
- chromic anhydride
- temperature
- chromite concentrate
- Prior art date
Links
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 title claims abstract 15
- 238000004519 manufacturing process Methods 0.000 title 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract 16
- 238000002386 leaching Methods 0.000 claims abstract 8
- 239000012141 concentrate Substances 0.000 claims abstract 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 239000003054 catalyst Substances 0.000 claims abstract 4
- 239000013078 crystal Substances 0.000 claims abstract 4
- 239000012452 mother liquor Substances 0.000 claims abstract 4
- 238000000926 separation method Methods 0.000 claims abstract 4
- 238000005119 centrifugation Methods 0.000 claims abstract 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract 2
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 claims abstract 2
- 238000001035 drying Methods 0.000 claims abstract 2
- 238000005868 electrolysis reaction Methods 0.000 claims abstract 2
- 239000008151 electrolyte solution Substances 0.000 claims abstract 2
- 238000001704 evaporation Methods 0.000 claims abstract 2
- 230000008020 evaporation Effects 0.000 claims abstract 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims abstract 2
- 230000005484 gravity Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims abstract 2
- 230000001590 oxidative effect Effects 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims abstract 2
- 239000000725 suspension Substances 0.000 claims abstract 2
Landscapes
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Способ получения хромового ангидрида из хромитового концентрата, включающий выщелачивание при температуре 140-160°С смесью 60-62%-ной серной кислоты и катализатора - хромового ангидрида, центрифугирование суспензии, окисление методом электролиза сульфата хрома, полученного в результате выщелачивания, в хромовую кислоту, упаривание раствора электролита при температуре 140-150°С до концентрации серной кислоты в упаренном растворе 950-1100 г/л, отделение кристаллов хромового ангидрида от маточного раствора центрифугированием и сушку готового продукта, отличающийся тем, что предварительно, перед сернокислотным выщелачиванием, хромитовый концентрат обогащают методом гравитации, количество катализатора при выщелачивании составляет 70-100% от содержания оксида двухвалентного железа в хромитовом концентрате, а после отделения от маточного раствора кристаллы хромового ангидрида дополнительно отмывают в серной кислоте концентрации 60-62% при температуре 140-150°С.A method of producing chromic anhydride from a chromite concentrate, including leaching at a temperature of 140-160 ° C with a mixture of 60-62% sulfuric acid and a catalyst - chromic anhydride, centrifuging the suspension, oxidizing the chromium sulfate obtained by leaching to chromic acid by electrolysis, evaporation of the electrolyte solution at a temperature of 140-150 ° C to a concentration of sulfuric acid in the evaporated solution of 950-1100 g / l, separation of crystals of chromic anhydride from the mother liquor by centrifugation and drying of the finished product kta, characterized in that prior to sulfuric acid leaching, the chromite concentrate is enriched by gravity, the amount of catalyst during leaching is 70-100% of the content of ferrous oxide in the chromite concentrate, and after separation from the mother liquor, crystals of chromic anhydride are additionally washed in sulfuric acid concentration of 60-62% at a temperature of 140-150 ° C.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007121683/15A RU2349551C1 (en) | 2007-06-09 | 2007-06-09 | Method of producing chromium anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2007121683/15A RU2349551C1 (en) | 2007-06-09 | 2007-06-09 | Method of producing chromium anhydride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2007121683A true RU2007121683A (en) | 2008-12-20 |
| RU2349551C1 RU2349551C1 (en) | 2009-03-20 |
Family
ID=40545208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2007121683/15A RU2349551C1 (en) | 2007-06-09 | 2007-06-09 | Method of producing chromium anhydride |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2349551C1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2005241B (en) * | 1977-09-22 | 1982-03-10 | Inman D | Obtaining chromic oxide from chromite ore |
| SU1168511A1 (en) * | 1983-05-04 | 1985-07-23 | Предприятие П/Я А-7125 | Method of obtaining chrome anhydride |
| SU1161470A1 (en) * | 1983-08-03 | 1985-06-15 | Предприятие П/Я А-4427 | Method of obtaining chromium anhydride |
-
2007
- 2007-06-09 RU RU2007121683/15A patent/RU2349551C1/en active IP Right Revival
Also Published As
| Publication number | Publication date |
|---|---|
| RU2349551C1 (en) | 2009-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106882822A (en) | A kind of method that lithium is recycled into battery-level lithium carbonate in sinker mother liquor | |
| CN109928872B (en) | Method for high-purity synthesis of anthraquinone and co-production of magnesium sulfate | |
| US4163047A (en) | Process for producing sulfuric acid from waste acid and iron sulfate | |
| RU2007121683A (en) | METHOD FOR PRODUCING CHROMIUM ANHYDRIDE | |
| CN104944466B (en) | A kind of wet method prepares the production method of rich-titanium material | |
| RU2013106978A (en) | METHOD FOR COMPLEX PROCESSING OF DOMAIN EDUCATION RESIDUES | |
| ATE416631T1 (en) | TOMATO PRODUCTS AND METHODS FOR THEIR PRODUCTION | |
| CN102323179A (en) | Method for detecting sulfur dioxide in desulfurized gypsum | |
| CN106219614A (en) | Utilize the method that titanium white waste acid produces low titanium ferrous slag | |
| CN103265083A (en) | Method for producing feed-grade manganese sulfate monohydrate | |
| CN109928871B (en) | Method for high-purity anthraquinone synthesis and ammonium sulfate co-production | |
| CN103265072A (en) | Method for crystallizing zirconium oxychloride | |
| CN209161511U (en) | A kind of zinc sulfate purifying plant | |
| CN102417525A (en) | Preparation method for synthesizing D-glucosamine sodium sulfate | |
| CN105130790A (en) | Method of separating and purifying succinic acid, glutaric acid and adipic acid from residual liquid from preparation of adipic acid through oxidization of cyclohexanone by nitric acid | |
| CN104860387A (en) | Method for preparing poly-aluminum ferric silicate sulfate (PAFSS) from wastes | |
| JPH01164733A (en) | Method for manufacturing titanium dioxide | |
| CN103333094A (en) | Process method for crystallization purification of proline | |
| CN105693886A (en) | Preparation method of heparin sodium | |
| SG11201808954RA (en) | Method for purifying methacrylic acid and method for producing methacrylic acid | |
| RU2006100255A (en) | METHOD FOR PRODUCING ENRICHED CARNELLITE | |
| CN103159615A (en) | Ammonium citrate synthesizing method | |
| CN106866441A (en) | A kind of preparation method of high-purity grade of Ferric Sodium Edetate | |
| CN106501446A (en) | The detection method of dioxygen water demand in concentrating waste acid iron removal | |
| CN1244496C (en) | Method for producing white alum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PD4A | Correction of name of patent owner | ||
| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20190610 |
|
| NF4A | Reinstatement of patent |
Effective date: 20200113 |