SU460611A3 - The method of producing alkali metal fluorosilicates - Google Patents
The method of producing alkali metal fluorosilicatesInfo
- Publication number
- SU460611A3 SU460611A3 SU1779637A SU1779637A SU460611A3 SU 460611 A3 SU460611 A3 SU 460611A3 SU 1779637 A SU1779637 A SU 1779637A SU 1779637 A SU1779637 A SU 1779637A SU 460611 A3 SU460611 A3 SU 460611A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- alkali metal
- producing alkali
- metal fluorosilicates
- fluorosilicates
- gypsum
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Processing Of Solid Wastes (AREA)
- Silicon Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
3 мывают 1,88 л воды. Содержание фтора в сернокислотных щелоках и промывпых водах соответственно 14,5 и 5 г/л. Содержание фтора в гипсовом остатке 0,25%. Оба фильтра объедин ют. К смеси добав-5 л ют сульфат натри в количестве 40 г на 1л смеси. Выдел ющийс осадок содержит 95% фторсиликата натри . Предмет изобретени 10 Способ получени фторсиликатов щелочных металлов из гипсовых отходов, образующихс при разложении природных фосфатов серной кислотой в присутствии ионов щелочных ме-15 таллов и кремнезема, путем выщелачивани 4 гипсовых отходов при 20-90°С 2-20%-ной серной кислотой, отличающийс тем, что, с целью упрощени способа, перед выщелачиванием кислотой гипсовые отходы при 20- 90°С обрабатывают водой, вз той в количестве 0,2-0,6 вес. ч. на 1 вес. ч. гипсовых отходов, с последующим объединением растворов, полученных при кислотной и водной обработке, и осаждением фторсиликата -щелочного металла из объединенного раствора солью щелочного металла, например сульфатом натри . концентрацию которого в реакционной смеси берут пор дка 20-60 г/л. 2. Способ по п. 1, отличающийс тем, что на 1 вес. ч. гипсовых отходов берут 1-2 вес. ч. серной кислоты.3 wash 1.88 liters of water. The fluorine content in sulfuric liquor and washing waters is 14.5 and 5 g / l, respectively. The fluorine content in the gypsum residue is 0.25%. Both filters are combined. To the mixture is added 5 liters of sodium sulfate in the amount of 40 g per 1 l of the mixture. The precipitate recovered contained 95% sodium fluorosilicate. The subject of the invention. 10 A method for producing alkali metal fluorosilicates from gypsum wastes, which are formed during the decomposition of natural phosphates with sulfuric acid in the presence of alkali metal ions-15 tal and silica, by leaching 4 gypsum wastes at 20-90 ° C with 2-20% sulfuric acid, characterized in that, in order to simplify the process, before leaching with acid, gypsum waste at 20- 90 ° C is treated with water taken in an amount of 0.2-0.6 weight. h. on 1 weight. including gypsum wastes, followed by combining the solutions obtained by acid and water treatment, and precipitating the fluorosilicate alkali metal from the combined solution with an alkali metal salt, for example sodium sulfate. the concentration of which in the reaction mixture is taken in the order of 20-60 g / l. 2. A method according to claim 1, characterized in that by 1 weight. h. gypsum waste take 1-2 weight. including sulfuric acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712125593 DE2125593A1 (en) | 1971-05-24 | 1971-05-24 | Process for the recovery of sodium silicofluoride from waste gypsum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SU460611A1 SU460611A1 (en) | 1975-02-15 |
| SU460611A3 true SU460611A3 (en) | 1975-02-15 |
Family
ID=5808714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1779637A SU460611A3 (en) | 1971-05-24 | 1972-04-26 | The method of producing alkali metal fluorosilicates |
Country Status (5)
| Country | Link |
|---|---|
| BR (1) | BR7203281D0 (en) |
| CA (1) | CA988274A (en) |
| DE (1) | DE2125593A1 (en) |
| FR (1) | FR2138638A1 (en) |
| SU (1) | SU460611A3 (en) |
-
1971
- 1971-05-24 DE DE19712125593 patent/DE2125593A1/en active Pending
-
1972
- 1972-04-13 FR FR7213032A patent/FR2138638A1/en active Granted
- 1972-04-26 SU SU1779637A patent/SU460611A3/en active
- 1972-05-23 CA CA142,732A patent/CA988274A/en not_active Expired
- 1972-05-24 BR BR328172A patent/BR7203281D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SU460611A1 (en) | 1975-02-15 |
| CA988274A (en) | 1976-05-04 |
| FR2138638A1 (en) | 1973-01-05 |
| FR2138638B1 (en) | 1974-12-20 |
| BR7203281D0 (en) | 1973-05-24 |
| DE2125593A1 (en) | 1972-12-07 |
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