SU583977A1 - Method of preparing sodium fluoride solution - Google Patents
Method of preparing sodium fluoride solutionInfo
- Publication number
- SU583977A1 SU583977A1 SU7502185485A SU2185485A SU583977A1 SU 583977 A1 SU583977 A1 SU 583977A1 SU 7502185485 A SU7502185485 A SU 7502185485A SU 2185485 A SU2185485 A SU 2185485A SU 583977 A1 SU583977 A1 SU 583977A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sodium fluoride
- fluoride solution
- solution
- preparing sodium
- interaction
- Prior art date
Links
Landscapes
- Silicon Compounds (AREA)
Description
Изобретение относитс к технологии получени фтористого натри , используемого дл производства криолита.This invention relates to a process for the production of sodium fluoride used for the production of cryolite.
Известен ползчени раствора фтористого натри путем взаимоде 1стви едкого натра с кремпефтористов.одородной кислотой или кре:мнефторидом натри . Реагенты на взаимодействие берут в соотношении, соответственно 6 : 1 или 4:1 и лроцесс ведут при 90-100°С в течение 1 ч I.A solution of sodium fluoride creeping by the interaction of sodium hydroxide with creamy hydrofluoric acid or cree: sodium fluoride is known. Interaction reagents are taken in a ratio of 6: 1 or 4: 1, respectively, and the process is carried out at 90-100 ° C for 1 hour I.
Известен также способ получени раствора фтористого натри путем взаимодействи кремнефтористоводородной кислоты с содой при нагревании до 80-90°С. Выпадающую в осадок двуокись кремни отстаивают, сгущают и отдел ют от раствора фтористого натРи 2.There is also known a method of obtaining a solution of sodium fluoride by reacting hydrofluorosilicic acid with soda when heated to 80-90 ° C. The silicon dioxide precipitated is precipitated, thickened and separated from the sodium fluoride solution 2.
Иедостатком известного способа вл етс высокое содержание двуокиси кремни в растворе фтористого натри 0,4-0,5 г/л.The disadvantage of this method is the high content of silicon dioxide in sodium fluoride solution of 0.4-0.5 g / l.
Цель изобретени - снижение содержани двуокиси кремни в продукте.The purpose of the invention is to reduce the silica content of the product.
Поставленна цель дОСтигаетс описываемым способом получени раствора фтористого натри путем взаимодействи кремнефтористоводородной кислоты с содой в присутствии четыреххлористого углерода с последующим отстаиванием, сгущением и отделением осадка от раствора фтористого натри . При The goal is achieved by the described method of obtaining a solution of sodium fluoride by reacting silicofluoric acid with soda in the presence of carbon tetrachloride followed by settling, concentration and separation of the precipitate from sodium fluoride solution. With
этом четыреххлористыи углерод ввод т через 10 -15 мин от начала взаимодействи в количестве 1-50 мг/л.In this case, carbon tetrachloride is introduced in 10-15 minutes from the start of the interaction in the amount of 1-50 mg / l.
Предлагаемый способ позволит снизить содержание двуокиси кремни в растворе фтористого натри до 0,03 г/л.The proposed method will reduce the content of silicon dioxide in a solution of sodium fluoride to 0.03 g / l.
Пример. К 4,2 кг кремнсфтористоводородиой кислоты концентрацией 10,06%, нагретой до , добавл ют при перемешивании 15,9 кг 6%-ного водного раствора соды. Через 10 мин в смесь ввод т 0,38 г четыреххлористого углерода, после чего перемещивают еще 15 мин. Обща продолжительность реакции составл ет 25 мии. Раствор фтористого натри отдел ют от кремкегел через патронный фильтр-сгуститель поверхностью 160 см-. Очшценный раствор содержит 0,03 г/л дисперсной двуокиси кремнп .Example. To 4.2 kg of hydrofluoric acid with a concentration of 10.06%, heated to, 15.9 kg of a 6% aqueous soda solution are added with stirring. After 10 minutes, 0.38 g of carbon tetrachloride was added to the mixture, after which another 15 minutes was transferred. The total reaction time is 25 missions. The sodium fluoride solution is separated from the silica gel through a 160 cm-thick cartridge filter. This solution contains 0.03 g / l of dispersed silica.
Ф о р М } л а изобретени F o r M} l and inventions
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7502185485A SU583977A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing sodium fluoride solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7502185485A SU583977A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing sodium fluoride solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU583977A1 true SU583977A1 (en) | 1977-12-15 |
Family
ID=20635999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7502185485A SU583977A1 (en) | 1975-10-28 | 1975-10-28 | Method of preparing sodium fluoride solution |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU583977A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2513200C1 (en) * | 2012-10-29 | 2014-04-20 | Ахат Газизьянович Мустафин | Method of producing sodium fluoride |
-
1975
- 1975-10-28 SU SU7502185485A patent/SU583977A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2513200C1 (en) * | 2012-10-29 | 2014-04-20 | Ахат Газизьянович Мустафин | Method of producing sodium fluoride |
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