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Cryolite Posted on 2008-08-26 [India]
Products Detail :- Cryolite (Na3AlF6, sodium hexafluoroaluminate) is an uncommon mineral of very limited natural distribution. It is mostly identified with the once large deposit at Ivigtût on the west coast of Greenland, which ran out in 1987.
It was historically used as an ore of aluminium and later in the electrolytic processing of the aluminium rich oxide ore bauxite (itself a combination of aluminium oxide minerals such as gibbsite, boehmite and diaspore). The difficulty of separating aluminium from oxygen in the oxide ores was overcome by the use of cryolite as a flux to dissolve the oxide mineral(s). Cryolite itself melts below 900°C (1173 Kelvin) and can dissolve aluminium oxides sufficiently well to allow easy extraction of the aluminium by electrolysis. Considerable energy is still required for both heating the materials and the electrolysis, but it is much more energy-efficient than melting the oxides themselves. Now, as natural cryolite is too rare to be used for this purpose, synthetic sodium aluminium fluoride is produced from the common mineral fluorite for this purpose.
Synthetic Cryolite
It was historically used as an ore of aluminium and later in the electrolytic processing of the aluminium rich oxide ore bauxite (itself a combination of aluminium oxide minerals such as gibbsite, boehmite and diaspore). The difficulty of separating aluminium from oxygen in the oxide ores was overcome by the use of cryolite as a flux to dissolve the oxide mineral(s). Cryolite itself melts below 900°C (1173 Kelvin) and can dissolve aluminium oxides sufficiently well to allow easy extraction of the aluminium by electrolysis. Considerable energy is still required for both heating the materials and the electrolysis, but it is much more energy-efficient than melting the oxides themselves. Now, as natural cryolite is too rare to be used for this purpose, synthetic sodium aluminium fluoride is produced from the common mineral fluorite for this purpose.
Cryolite occurs as glassy, colorless, white, reddish to grey-black prismatic monoclinic crystals. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 2.95 to 3. It is translucent to transparent with very low refractive indices of a=1.33851.339, b=1.33891.339, g=1.33961.34. These RI values are very close to that of water and thus if immersed in water, cryolite becomes essentially invisible.
Sodium Cryolite
Cryolite occurs as glassy, colorless, white, reddish to grey-black prismatic monoclinic crystals. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 2.95 to 3. It is translucent to transparent with very low refractive indices of a=1.33851.339, b=1.33891.339, g=1.33961.34. These RI values are very close to that of water and thus if immersed in water, cryolite becomes essentially invisible.
In addition to the Greenland occurrence, cryolite has been reported from Pikes Peak in Colorado, U.S.A.; Mont Saint-Hilaire, Quebec, Canada; and at Miass, Russia. It is also known from Brazil, Czech Republic, Namibia, Norway, Ukraine, and several U.S. states.
Cryolite was first described in 1799 for an occurrence in Ivigtut and Arksukfiord, West Greenland. The name is derived from the Greek cryò = chill and lithòs = stone.
Sodium Aluminium Fluoride
It was historically used as an ore of aluminium and later in the electrolytic processing of the aluminium rich oxide ore bauxite (itself a combination of aluminium oxide minerals such as gibbsite, boehmite and diaspore). The difficulty of separating aluminium from oxygen in the oxide ores was overcome by the use of cryolite as a flux to dissolve the oxide mineral(s). Cryolite itself melts below 900°C (1173 Kelvin) and can dissolve aluminium oxides sufficiently well to allow easy extraction of the aluminium by electrolysis. Considerable energy is still required for both heating the materials and the electrolysis, but it is much more energy-efficient than melting the oxides themselves. Now, as natural cryolite is too rare to be used for this purpose, synthetic sodium aluminium fluoride is produced from the common mineral fluorite for this purpose.
Potassium Cryolite
Cryolite occurs as glassy, colorless, white, reddish to grey-black prismatic monoclinic crystals. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 2.95 to 3. It is translucent to transparent with very low refractive indices of a=1.33851.339, b=1.33891.339, g=1.33961.34. These RI values are very close to that of water and thus if immersed in water, cryolite becomes essentially invisible.
Potassium Aluminium Fluoride
It was historically used as an ore of aluminium and later in the electrolytic processing of the aluminium rich oxide ore bauxite (itself a combination of aluminium oxide minerals such as gibbsite, boehmite and diaspore). The difficulty of separating aluminium from oxygen in the oxide ores was overcome by the use of cryolite as a flux to dissolve the oxide mineral(s). Cryolite itself melts below 900°C (1173 Kelvin) and can dissolve aluminium oxides sufficiently well to allow easy extraction of the aluminium by electrolysis. Considerable energy is still required for both heating the materials and the electrolysis, but it is much more energy-efficient than melting the oxides themselves. Now, as natural cryolite is too rare to be used for this purpose, synthetic sodium aluminium fluoride is produced from the common mineral fluorite for this purpose.
Company Name :- Triveni Chemicals
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Cryolite Posted on 2008-08-26 [India]
Products Detail :- Potassium Cryolite (Formula: K3AIF6) :
We produce a potassium Cryolite, which is an important industrial mineral which is used in the manufacture of iron linings. We exclusively produce this foundry flux chemical which acts as welding rod electrode in industries.
Sodium Cryolite (Formula: Na3AlF6) :
We manufacture supreme quality sodium cryolite is used in the smelting of aluminium, production of enamels, light-bulb glass and friction linings. This chemical is reactive in nature so we take extra precautions while packaging it. Sodium cryolite produced by us is widely in demand, as a grinding wheel abrasive, foundry flux chemical and welding rod electrode.
our Cryolite products consists of:
FLUOALUMINATE, HEXAFLUOROALUMINATE
Potassium Cryolite
Potassium Aluminium Fluoride
Potassium Aluminiumfluoride
Potassium Fluoaluminate
Tripotassium hexafluoroaluminate
Sodium Cryolite
Sodium Aluminium Fluoride
Sodium Aluminiumfluoride
Sodium Fluoaluminate
Trisodium hexafluoroaluminate
Company Name :- Triveni Chemicals
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