FIELD: chemistry.
SUBSTANCE: to obtain elemental tellurium, hydrolysis of tellurium hexafluoride is carried out at a pressure above atmospheric and reaction mixture temperature of 80-90°C. Telluric acid, formed as a result of hydrolysis, is reduced at a temperature of 80-90°C an aqueous solution of hydrochloric acid hydrazine with a concentration of 40-50%. The resulting elemental tellurium powder is filtered, washed on the filter with water to neutral medium and dried. The powder is reduced in a hydrogen medium at a temperature of 570-590°C to exclude a possible impurity of tellurium oxides.
EFFECT: invention allows to obtain tellurium of natural isotopic composition or having a displaced isotope composition with a high content of the basic substance and a high yield.
2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR ELECTROLYTIC REFINING OF CRUDE TELLURIUM | 2023 |
|
RU2817809C1 |
| METHOD OF PRODUCTION OF THE ISOTOPE-ENRICHED TELLURIUM (IV) OXIDE | 2004 |
|
RU2272783C1 |
| METHOD AND PLANT FOR PRODUCING TELLURIUM ISOTOPES | 2000 |
|
RU2188698C2 |
| METHOD FOR CONVERSION OF REACTION MASSES PRODUCED IN ALKALINE HYDROLYSIS OF LEWISITE INTO TECHNICAL PRODUCTS | 2009 |
|
RU2396099C1 |
| METHOD OF PROCESSING PRODUCTS OF ALKALINE HYDROLYSIS OF LEWISITE TO COMMERCIAL PRODUCT | 2008 |
|
RU2389526C1 |
| METHOD OF SELENIUM PRODUCING | 1994 |
|
RU2078029C1 |
| METHOD OF PRODUCING ZINC OXIDE | 2009 |
|
RU2420458C2 |
| METHOD FOR RECYCLING HYDRATE NITRATION PRECIPITATES | 2020 |
|
RU2761277C1 |
| METHOD FOR PREPARING URANIUM DIOXIDE POWDER-BASE TABLETTED FUEL | 2004 |
|
RU2296106C2 |
| METHOD OF OBTAINING ELEMENTARY ARSENIC AND SODIUM CHLORIDE FROM PRODUCTS OF ALKALINE HYDROLYSIS OF LEWISITE | 2009 |
|
RU2412734C2 |
