Aluminium monochloride
| Names | |
|---|---|
| IUPAC name
Chloridoaluminium[1]
| |
| Other names
Aluminium(I) chloride[citation needed]
| |
| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChemSpider |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| AlCl | |
| Molar mass | 62.43 g*mol-1 |
| Thermochemistry | |
Std molar
entropy (S298) |
227.95 J K-1 mol-1 |
Std enthalpy of
formation (DfH298) |
-51.46 kJ mol-1 |
| Related compounds | |
Related compounds
|
aluminium monofluoride gallium monofluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 degC [77 degF], 100 kPa).
| |
Aluminium monochloride, or chloridoaluminium is the metal halide with the formula AlCl. Aluminium monochloride as a molecule is thermodynamically stable at high temperature and low pressure only.[2] This compound is produced as a step in the Alcan process to smelt aluminium from an aluminium-rich alloy.
Alcan process
[edit]When an aluminium alloy is placed in a reactor that is heated to 1,300 degC and mixed with aluminium trichloride, a gas of aluminium monochloride is produced.[3]
- 2 Al(alloy) + AlCl3(gas) - 3 AlCl(gas)
It then disproportionates into aluminium melt and aluminium trichloride upon cooling to 900 degC.
The process is an instance of the general sub-halide catalytic distillation method (subhalide process) developed by Philipp Gross.[4] It was sold to Alcan but never put into full-scale production.[5][6]
Interstellar medium
[edit]This molecule has been detected in the interstellar medium, where molecules are so dilute that intermolecular collisions are unimportant.[7]
See also
[edit]References
[edit]- ^ "chloridoaluminium (CHEBI:30131)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute.
- ^ Chase, M. W.; Curnutt, J. L.; Prophet, H.; McDonald, R. A.; Syverud, A. N. (1975-01-01). "JANAF thermochemical tables, 1975 supplement". Journal of Physical and Chemical Reference Data. 4 (1): 1-176. Bibcode:1975JPCRD...4....1C. doi:10.1063/1.555517. ISSN 0047-2689.
- ^ Totten, George E.; MacKenzie, D. Scott (2003). Handbook of Aluminum. Vol. 2: Alloy Production and Materials Manufacturing. CRC Press. p. 59. ISBN 0-8247-0896-2.
- ^ "Fulmer Research Institute". The Engineer: 677. 12 November 1954.
- ^ Habashi, Fathi (1969). Principles of Extractive Metallurgy. CRC Press. p. 427. ISBN 978-0-677-01770-9.
- ^ Ron Lewin (April 2020). "The Physical Chemistry Department at Fulmer Research Institute". Fulmer Research Institute. Retrieved 5 October 2025.
- ^ J. Cernicharo, M. Guelin (1987). "Metals in IRC+10216 - Detection of NaCl, AlCl, and KCl, and tentative detection of AlF". Astronomy and Astrophysics. 183 (1): L10-L12. Bibcode:1987A&A...183L..10C.
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