SU587102A1 - Method of preparing cryolite - Google Patents
Method of preparing cryoliteInfo
- Publication number
- SU587102A1 SU587102A1 SU752187645A SU2187645A SU587102A1 SU 587102 A1 SU587102 A1 SU 587102A1 SU 752187645 A SU752187645 A SU 752187645A SU 2187645 A SU2187645 A SU 2187645A SU 587102 A1 SU587102 A1 SU 587102A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- cryolite
- weight
- minutes
- preparing cryolite
- preparing
- Prior art date
Links
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
. г . f 5 . g. f 5
с последующим отделением криолита и сушкой его.with the subsequent separation of cryolite and drying it.
Отличительным признаком способа вл етс то, что обработку исходной кремнефтористоводородной кислоты ведут при стехиометрическом или избыточном на 1-6%Количестве последней, при этом сначала подают 80-95% гидроокиси алюмини в течение 5-15 мин, а затем остальное количество в течение 5-20 мин.A distinctive feature of the method is that the initial fluorosilicic acid is treated with a stoichiometric or excess amount of 1–6% of the latter, with 80–95% aluminum hydroxide being first fed for 5–15 min and then the rest for 5–5 minutes. 20 minutes.
Способ позвол ет получить криолит с содержанием двуокиси кремни 0,1 0 ,2% при модуле 1,6-1,7 или 0,5-0,8% при повышенном модуле 2,3-2,7. При этом резко улучшаетс фильтруемость осадков двуокиси кремни до удельного сопротивлени (4,98 ± 2,5) м по сравнению с известным способом.The method allows to obtain cryolite with a silica content of 0.1-0.2% with a modulus of 1.6-1.7 or 0.5-0.8% with an increased modulus of 2.3-2.7. At the same time, the filterability of silicon dioxide precipitation is greatly improved to a specific resistance (4.98 ± 2.5) m as compared with the known method.
Пример. К 100 вес.ч. кремнефтористоводородной кислоты концентрацией 12,01% HjSif добавл ют I 10,5 вес.ч. идроокиси алюмини с содержанием 98% основного вещества. Реакционную смес.ь перемешивают при 95С в течение 10 мин, затем в суспензию добавл ют 3 вес.ч. гидроокиси алюмини , продолжа перемешивание ещ 15 мин. Суспензию раздел ют на фильтре . Удельное сопротивление осадка кремнегел составл ет (4, 98 ±2, 50) м . Осадок прокивают водой в расчете на получение 7%-ного смешанного раствора фтористого алюмини . Всего получают J.92 вес.ч, раствораExample. To 100 weight.h. hydrofluorosilicic acid with a concentration of 12.01% HjSif is added I 10.5 parts by weight iroxide aluminum containing 98% of the main substance. The reaction mixture was stirred at 95 ° C for 10 minutes, then 3 parts by weight was added to the suspension. aluminum hydroxide, continuing mixing for another 15 minutes. The suspension is separated on a filter. The silica gel resistivity is (4, 98 ± 2, 50) m. The precipitate is pumped with water in order to obtain a 7% mixed solution of aluminum fluoride. Just get J.92 weight.h, solution
587102587102
концентрацией 7,02% АРРд. В этот ра створ загружают 580 вес.ч. раствора фтористого натри концентрацией 3,45% Na Р . Процесс провод т при в течение 30 мин. Осадок отдел ют от маточного раствора и суJaT. Получают 32 вес.ч. криолита с содержанием 50,7% и 0,85%Si О,и модулем 2,9.concentration of 7.02% APPD. 580 weight parts are loaded into this section. sodium fluoride solution with a concentration of 3.45% Na P. The process is carried out for 30 minutes. The precipitate is separated from the mother liquor and SuJaT. Receive 32 weight.h. cryolite with a content of 50.7% and 0.85% Si O, and a modulus of 2.9.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752187645A SU587102A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing cryolite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752187645A SU587102A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing cryolite |
Publications (1)
Publication Number | Publication Date |
---|---|
SU587102A1 true SU587102A1 (en) | 1978-01-05 |
Family
ID=20636691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU752187645A SU587102A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing cryolite |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU587102A1 (en) |
-
1975
- 1975-10-28 SU SU752187645A patent/SU587102A1/en active
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