Published June 1999 | Version v1
Journal article Metadata-only

Study of heat treatment of potassium hepta fluorotantalate

Creators

  • 1. Inst. Khimii i Tekhnologii Redkikh Ehlementov i Mineral'nogo Syr'ya Kol'skogo Nauchnogo Tsentra RAN, Apatity (Russian Federation)

Description

The feasibility of additional purification of potassium hepta fluorotantalate from inclusions by heat treatment in the air in the temperature range of 250-700 deg C and under vacuum (10-1 - 10-2 torr) at temperatures up to 450 deg C is studied. It is found that heat treatment in the air at 450-600 deg C permits reduction of carbon and nitrogen content down to the required level of purity. When heated in vacuum, major amounts of water and ammonia are removed at temperatures up to 300 deg C and 250-500 deg C, respectively

Abstract (Russian)

Изучена возможность дополнительной очистки гептафторотанталата калия от примесей внедрения методом термообработки на воздухе в интервале температур 250-700 град. С и в вакууме (10-1 - 10-2 мм рт.ст.) при температурах до 450 град. С. Установлено, что термообработка на воздухе при 450-600 градусах С позволяет снизить содержание углерода и азота до требуемого уровня чистоты. При нагревании в вакууме основные количества воды и амиака удаляются соответственно при температурах до 300 град. С и 250-500 град. С

Additional details

Additional titles

Original title (Russian)
Исследование термообработки гептафторотанталата калия

Publishing Information

Journal Title
Zhurnal Prikladnoj Khimii
Journal Volume
72
Journal Issue
6
Journal Page Range
p. 904-906
ISSN
0044-4618
CODEN
ZPKHAB

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
31065040
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AIR; FLUORIDES; IMPURITIES; MEDIUM VACUUM; OXIDATION; POTASSIUM COMPOUNDS; PURIFICATION; TANTALUM COMPLEXES; TEMPERATURE RANGE 0400-1000 K
Descriptors DEC
ALKALI METAL COMPOUNDS; CHEMICAL REACTIONS; COMPLEXES; FLUIDS; FLUORINE COMPOUNDS; GASES; HALIDES; HALOGEN COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPLEXES

Optional Information

Notes
4 refs., 2 figs.