SU69605A1 - The method of producing alumina - Google Patents
The method of producing aluminaInfo
- Publication number
- SU69605A1 SU69605A1 SU1982A SU348989A SU69605A1 SU 69605 A1 SU69605 A1 SU 69605A1 SU 1982 A SU1982 A SU 1982A SU 348989 A SU348989 A SU 348989A SU 69605 A1 SU69605 A1 SU 69605A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- calcium
- solution
- producing alumina
- nepheline
- hydrochloric acid
- Prior art date
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Предлагаетс способ получени глинозема, едких щелочей и сиштофа из нефелина, заключающийс в том, что нефелиновый концентрат, суспендированный в воде, обрабатывают небольшим избытком едкой извести при нагревании под давлением до 15-20 ат. При этом в растворе образуетс едка щелочь, а в осадке кальциевый нефелин (анортит ) по реакции:A method for producing alumina, caustic alkalis, and nepheline cysttope is proposed, consisting in that nepheline concentrate suspended in water is treated with a slight excess of caustic lime when heated under pressure up to 15-20 at. In this case, a caustic alkali is formed in the solution, and calcium nepheline (anortite) in the sediment by the reaction:
R2O-Al2O3-2SiO2 + Ca (OH)2-faq 2ROH + CaO-Al203-2Si02-aqR2O-Al2O3-2SiO2 + Ca (OH) 2-faq 2ROH + CaO-Al203-2Si02-aq
Осадок отфильтровывают от раствора едкой щелочи и разлагают сол ной кислотой (20-25%) на холоду или при слабом нагревании:The precipitate is filtered from a solution of caustic alkali and decomposed with hydrochloric acid (20-25%) in the cold or with weak heating:
СаО. А1,Оз 2SIO2 + 8HCl CaCl2 + Al2CIe + 2SiO2 + 4H2OCao. A1, Oz 2SIO2 + 8HCl CaCl2 + Al2CIe + 2SiO2 + 4H2O
Дл предотвращени перехода в раствор кремнезема кислоту добавл ют к осадку постепенно небольшими порци ми. Нерастворимый кремнеземистый остаток (сиштоф) отдел ют от раствора хлоридов кальци и алюмини ; после упарки раствор в концентрированном виде пульверизируют во вращающуюс To prevent transition into the silica solution, the acid is added to the precipitate gradually in small portions. The insoluble silica residue (sishtof) is separated from the solution of calcium chloride and aluminum; after evaporation, the concentrated solution is pulverized into a rotating
печь при температуре около 1300°. При этом образуетс алюминат кальци и выдел етс сол на кислота в газообразном состо нии по реакции:oven at about 1300 °. Thereby, calcium aluminate is formed and hydrochloric acid is released in the gaseous state by the reaction:
CaClj-f AlaCl8 4H2O (пар) СаО-А12Оз + 8НС1CaClj-f AlaCl8 4H2O (steam) CaO-A12Oz + 8HC1
Сол ную кислоту возвращают в процесс дл разложени новой пврции анортита, а алюминатокальциевый спек перерабатывают по известному способу (разложением раствором соды) дл получени глинозема с одновременным получением углекислого кальци по реакции:Hydrochloric acid is returned to the process to decompose anortite, and aluminate-calcium sinter is processed by a known method (decomposition by soda solution) to produce alumina with simultaneous production of calcium carbonate by the reaction:
СаО AlgOg -Ь NciaCOg CaCOj -f -f-Na,O-Al.,O3CaO AlgOg-NciaCOg CaCOj-f-Na, O-Al., O3
Едкую известь регенерируют из углекислого кальци обычным способом .Caustic lime is regenerated from calcium carbonate in the usual way.
Предмет изобретени Subject invention
Способ получени глинозема, едких щелочей и сиштофа из нефелина , отличающийс тем, что нефелиновый концентрат обрабаты75 вают в водной среде при нагревании и под давлением гидроокисью кальци , осадок кальциевого нефелнна отдел ют от раствора щелочи и разлагают сол ной кислотой, сиштоф отфильтровывают, а раствор хлористых солей кальци и алюмини распыл ют в реакционном пространстве с температурой окола 1300° с целью разложени хлоридов с получением сол ной кислоты иалюмината кальци , перерабатываемого на глинозем известным образом .The method of producing alumina, caustic alkalis and nepheline cyshtof, wherein nepheline concentrate is treated in an aqueous medium while heated and under pressure with calcium hydroxide, the calcium nepheline precipitate is separated from the alkali solution and decomposed with hydrochloric acid, the sieve is filtered, and the chlorine solution is separated Calcium and aluminum salts are sprayed into the reaction space with a temperature of about 1300 ° C in order to decompose the chlorides to produce hydrochloric acid calcium iumuminate, processed to alumina .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1982A SU69605A1 (en) | 1947-01-18 | 1947-01-18 | The method of producing alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1982A SU69605A1 (en) | 1947-01-18 | 1947-01-18 | The method of producing alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU69605A1 true SU69605A1 (en) | 1947-11-30 |
Family
ID=52397084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1982A SU69605A1 (en) | 1947-01-18 | 1947-01-18 | The method of producing alumina |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU69605A1 (en) |
-
1947
- 1947-01-18 SU SU1982A patent/SU69605A1/en active
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