RO93136B1 - Process for preparing cryolite - Google Patents
Process for preparing cryoliteInfo
- Publication number
- RO93136B1 RO93136B1 RO120390A RO12039085A RO93136B1 RO 93136 B1 RO93136 B1 RO 93136B1 RO 120390 A RO120390 A RO 120390A RO 12039085 A RO12039085 A RO 12039085A RO 93136 B1 RO93136 B1 RO 93136B1
- Authority
- RO
- Romania
- Prior art keywords
- cryolite
- obtaining
- temperature
- aluminum hydroxide
- hydrofluoric acid
- Prior art date
Links
- 229910001610 cryolite Inorganic materials 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Inventia se refera la un procedeu de obtinere a criolitului pornind de la acid fluorhidric, hidroxid de aluminiu si carbonat de sodiu. în prima faza a procesului acidului fluorhidric diluat la 25...48% HF, lipsit de impuritati, în special siliciu, reactioneaza cu hidroxid de aluminiu la o temperatura cuprinsa între 60 si 100 degree C cu formarea acidului fluoaluminic solutie, dupa care, în faza a doua are loc reactia de precipitare a criolitului cu carbonat de sodiu sau solid. Reactia are loc la o temperatura de 50...100 degree C si un pH = 5...7, formîndu-se o suspensie de criolit cu raport S/L =1/5...1/10 se filtreaza si se calcineaza, obtinîndu-se produsul finit.The invention relates to a process for obtaining cryolite starting from hydrofluoric acid, aluminum hydroxide and sodium carbonate. In the first phase of the diluted hydrofluoric acid process at 25 ... 48% HF, free of impurities, especially silicon, reacts with aluminum hydroxide at a temperature of 60 to 100 ° C with the formation of fluoaluminic acid solution, the second step is the precipitation reaction of cryolite with sodium or solid carbonate. The reaction is carried out at a temperature of 50-100 ° C and a pH of 5 ... 7, forming a cryolite suspension with an S / L = 1/5 ... 1/10 ratio being filtered and calcined, obtaining the finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO120390A RO93136B1 (en) | 1985-10-15 | 1985-10-15 | Process for preparing cryolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO120390A RO93136B1 (en) | 1985-10-15 | 1985-10-15 | Process for preparing cryolite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO93136A2 RO93136A2 (en) | 1987-12-30 |
| RO93136B1 true RO93136B1 (en) | 1987-12-31 |
Family
ID=20118081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO120390A RO93136B1 (en) | 1985-10-15 | 1985-10-15 | Process for preparing cryolite |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO93136B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043033C (en) * | 1994-08-30 | 1999-04-21 | 湘乡铝厂 | Method for production of high-molecular-ratio ice spar |
-
1985
- 1985-10-15 RO RO120390A patent/RO93136B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO93136A2 (en) | 1987-12-30 |
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