AQUEOUS BEHAVIOR OF ALUMINUM OXYCHLORIDE
Abstract
Contrary to a previous report, anhydrous A1OC1 dissolves readily in water to form a solution that is stable toward hydrolysis, even at 100 C. Concentrated solutions disproportionate appreciably to aluminum trichloride and aluminum oxide at 100, but not at 60 C. The strong conductance of aqueous A1OC1 solutions, combined with freezing point depression data, indicate that dissolved A1OC1 is polymerized. A crystalline hydrate A1OC1.2.5H2O has been isolated. Pyrolysis of this hydrate at 100 C leads to the formation of a lower hydrate, approaching the composition A1OC1.H2O. At temperatures of 200-300 C, pyrolysis of the hydrate leads to an almost anhydrous A1OC1. However, these pryolytic dehydration reactions are accompained by a competing reaction which evolves HC1 and forms a10(OH). The latter compound can be kept to a minimum by carrying out the pyrolysis at higher temperatures where dehydration requires shorter reaction times; data indicate that the dehydration reaction is more temperature dependent than is the reaction forming A10(OH) + HC1.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 02, 1964
- Accession Number
- AD0434442
Entities
People
- Benjamin M. Siegel
- Robert L. Johnson
Organizations
- The Aerospace Corporation