SU71386A1 - Method for producing hydrogen fluoride from fluorspar - Google Patents
Method for producing hydrogen fluoride from fluorsparInfo
- Publication number
- SU71386A1 SU71386A1 SU853-46A SU346291A SU71386A1 SU 71386 A1 SU71386 A1 SU 71386A1 SU 346291 A SU346291 A SU 346291A SU 71386 A1 SU71386 A1 SU 71386A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fluorspar
- hydrogen fluoride
- producing hydrogen
- fluoride
- hydrofluoric acid
- Prior art date
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Silicon Compounds (AREA)
Description
Известный КИСЛОТНЫЙ способ получени плавиковой кислоты из плавикового шпата требует затраты серной кислоты, причем в качестве малоценного отхода получаетс гипс.The known ACID method of obtaining hydrofluoric acid from fluorspar requires a cost of sulfuric acid, and gypsum is obtained as a low-value waste.
Кроме того, к плавиковому шпату, идуш;ему на производство плавиковой кислоты и фторсолей, предъ вл ютс достаточно высокие требовани в отношении чистоты (небольЕтое содержание кремнезема и кальцита ). Поэтому плавиковый шпат предварительно подвергаетс обогашению флотацией, так как при кремпеземистом плавике выдел юшмйс в процессе обработки его серной кислотой фтористо-водородный газ сильно загр зн етс фтористым кремнием; ввиду этого получаюша с плавикова кислота должна подвергатьс очистке от кремнефтористоводородной кислоты. Чем больше кремнезема в плавиковом шпате, тем больше тер етс фтора в виде кремиефторида натри , получаюшегос в результате очистки содой технической плавиковой кислоты . Повышенное содержание кальцита в плавике обусловливает непроизводительный расход серной кислоты.In addition, relatively high purity requirements (low silica and calcite content) are imposed on the fluorspar, idush, for the production of hydrofluoric acid and fluorine salts. Therefore, fluorspar is preliminarily subjected to flotation enrichment, since in cremacene fluoride, yushmys are released during the treatment with sulfuric acid and the fluoric hydrogen gas is highly contaminated with silicon fluoride; therefore, hydrofluoric acid must be purified from hydrofluoric acid. The more silica in the fluorspar, the more fluoride is lost in the form of sodium cremyefluoride, resulting from the purification of technical hydrofluoric acid with soda. The increased content of calcite in fluoride causes unproductive consumption of sulfuric acid.
Предлагаемый способ переработки плавикового шпата любой сортности на плавиковую кислоту основан на усовершенствовании известного способа получени фтористого водорода разложением плавикового шпата парами воды при высокой температуре и заключаетс в следуюш;ем. Измельченный плавик смешиваетс с кремнеземом или известн ком, в зависимости от химического состава плавика, из расчета получени в шихте мол рного отношени The proposed method for processing fluorspar of any grade to hydrofluoric acid is based on the improvement of the known method for producing hydrogen fluoride by decomposing fluorspar with water vapor at high temperature and consists of the following; The crushed fusil is mixed with silica or limestone, depending on the chemical composition of the fluoride, based on the molar ratio obtained in the mixture.
CaF.,+CaO , „CaF,,4-CaO ,CaF., + CaO, „CaF ,, 4-CaO,
1 - 3 И -. , ., - ,, 1 . 1 - 3 AND -. , ., - ,, one .
SiO.SiO.
AloO. + FeoO,AloO. + FeoO,
Полученна шихта подвергаетс разложению при температуре 1000- 1300° парами воды. В результате процесса получаетс фтористоводородный газ и силикаты кальци по реакции:The resulting mixture is decomposed at a temperature of 1000-1300 ° with water vapor. The process produces hydrofluoric gas and calcium silicates by the reaction:
п CaFa -L m Si О, + п Н зО (пар 2nHF4 nCaO-mSi02.n CaFa -Lm Si O, + nN ZO (pair 2nHF4 nCaO-mSi02.
В услови х высокой температуры и наличи в газовой фазе паровUnder conditions of high temperature and the presence of vapor in the gas phase
7373
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853-46A SU71386A1 (en) | 1946-06-18 | 1946-06-18 | Method for producing hydrogen fluoride from fluorspar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853-46A SU71386A1 (en) | 1946-06-18 | 1946-06-18 | Method for producing hydrogen fluoride from fluorspar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU71386A1 true SU71386A1 (en) | 1947-11-30 |
Family
ID=48248464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU853-46A SU71386A1 (en) | 1946-06-18 | 1946-06-18 | Method for producing hydrogen fluoride from fluorspar |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU71386A1 (en) |
-
1946
- 1946-06-18 SU SU853-46A patent/SU71386A1/en active
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