Aluminum fluoride
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Aluminum fluoride
structure -
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CAS No:
7784-18-1
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Formula:
AlF3
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Chemical Name:
Aluminum fluoride
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Synonyms:
Aluminum fluoride (AlF3);Aluminum fluoride;Aluminum trifluoride;Aluminum trifluoride (AlF3);856859-79-5;1202643-05-7;1328946-66-2
- Categories:
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CAS No:
Description
Aluminum fluoride is a white, odorless powder or granule. Aluminum fluoride, AlF3, is an anhydrous crystalline powder with a melting point of 1291 "C. Aluminum fluoride (hydrated), AlF3·3
1/2
H20, is a white crystalline powder that is insoluble in water.
Characteristics
0 Ų
-8.65050
White crystalline powder, no odor
3.10 g/cm3
1291 °C
1260 °C
1250°C
H2O: SLIGHTLY soluble
Storage Room low temperature ventilation drying ,With acids, food additives separate storage
1 mm Hg @ 1238 °C
Safety Information
III
8
3260
1
R36/37/38
S26-S37/39
BD0725000
Xi
Low melting solids or colorless, volatile liquids. /Alkylaluminum halides/
Aluminum fluoride Use and Manufacturing
1. Fluorosilicic acid method From the phosphate fertilizer plant 18% fluorosilicic acid solution heated to about 78 ℃, and then added to the reactor with aluminum hydroxide at 100 ° C reaction aluminum fluoride solution generated by centrifugal separation to remove hydrated silicic acid, the filtrate Into the mold, at 90 ℃ for 3 ~ 5h, in aluminum fluoride fluoride (AIF3 · 3H2O) crystallization. After the centrifugal separation, the aluminum fluoride crystal (water 5%) has two dehydration by boiling furnace, the first boiling furnace temperature control at about 205 ℃, first remove most of the water, so that the total water of aluminum fluoride water (Including crystal water) from about 45% to about 6%, and then in the second boiling furnace off the rest of the water, the furnace temperature control in the 590 ~ 600 ℃. Dehydrated material after cooling, the system was anhydrous aluminum fluoride products. (2) aluminum hydroxide aluminum hydroxide and anhydrous hydrofluoric acid reaction aluminum fluoride trihydrate. And then crystallized and filtered to obtain aluminum fluoride trihydrate, and then dehydrated by drying (cauterization) to obtain an anhydrous aluminum fluoride product. 3. To a polyethylene beaker, 120 g of 50% hydrofluoric acid and about 250 g of crushed ice were added to the polyethylene beaker. After neutralization by adding 375 g of 23% aqueous ammonia, the mixture was heated to 50 ° C. And then an aqueous solution of aluminum chloride (prepared by dissolving 121 g of aluminum chloride hexahydrate AlCl3 · 6H2O in 450 mL of water) heated to 50 ° C was added thereto under vigorous stirring, and stirring was continued for several hours and left to stand overnight. The colorless precipitate was separated by filtration, washed successively with about 50 mL of 5% aqueous ammonia and about 400 mL of water, and then dried at 100 to 110C and pulverized. Can be obtained hexafluoroammonium aluminum aluminate (N H4) 3AlF6 (yield 92%). The above-mentioned ammonium hexafluoroaluminate 4.5g into platinum dish (50mL), slowly heated with a gas lamp 30min, followed by strong heat, until the weight is no longer reduced, for about 2h. Then place the cooling. As a result of the heating process produces white smoke, it is necessary in the fume hood in the. AlF3 in the form of 99% to 100% of aluminum fluoride, the yield of about 90%.
Aluminium fluoride (AlF3) is an inorganic compound used primarily in the production of aluminium. This colorless solid can be prepared synthetically but also occurs in nature.
Computed Properties
Molecular Weight:83.976748
Hydrogen Bond Acceptor Count:3
Exact Mass:83.9767479
Monoisotopic Mass:83.9767479
Heavy Atom Count:4
Covalently-Bonded Unit Count:4
Compound Is Canonicalized:Yes
Price Analysis
- Data: 2026-07-23
- Price: 12500.00Yuan/mt
- Change: 0
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