Published November 2006 | Version v1
Journal article Metadata-only

Autoclave breakdown of zircon with ammonium fluorides

Creators

  • 1. Tomskij Politekhnicheskij Univ., Tomsk (Russian Federation)

Description

The kinetics of autoclave breakdown of zircon with ammonium fluoride or ammonium hydrogen difluoride were studied under laboratory conditions and optimum process parameters were identified. It is found that 95% decomposition of zircon can be reached for 1.5 h when using ammonium hydrogen difluoride at 300 deg C; under these conditions the pressure rises up to 45 atm. A general flowsheet is proposed for the cycle of zircon decomposition followed by ammonium fluoride recovery by regeneration and zirconyl hydroxide preparation

Abstract (Russian)

В лабораторных условиях изучена кинетика разложения циркона фторидом и гидрофторидом аммония в автоклаве и найдены оптимальные параметры процесса. Установлено, что при использовании гидрофторида аммония при температуре 300 град С 95%-ное разложение происходит за 1.5 ч, при этом в системе развивается давление до 45 атм. Предложена общая технологическая схема цикла разложения циркона с регенерацией фторида аммония и получением гидроксида цирконила

Additional details

Additional titles

Original title (Russian)
Автоклавное разложение циркона фторидами аммония

Publishing Information

Journal Title
Zhurnal Prikladnoj Khimii
Journal Volume
79
Journal Issue
11
Journal Page Range
p. 1777-1780
ISSN
0044-4618
CODEN
ZPKHAB

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
38046722
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AMMONIUM FLUORIDES; AUTOCLAVES; BENCH-SCALE EXPERIMENTS; CHEMICAL REACTION KINETICS; DECOMPOSITION; FLOWSHEETS; PRESSURE RANGE MEGA PA 01-10; TEMPERATURE RANGE 0400-1000 K; ZIRCON
Descriptors DEC
AMMONIUM COMPOUNDS; AMMONIUM HALIDES; CHEMICAL REACTIONS; DIAGRAMS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; INFORMATION; KINETICS; MINERALS; PRESSURE RANGE; PRESSURE RANGE MEGA PA; REACTION KINETICS; SILICATE MINERALS; TEMPERATURE RANGE

Optional Information

Notes
7 refs., 3 figs.