Chemistry and Electrochemistry in Aluminum Chloride Molten Salt Systems,
Abstract
The 1:1 AlCl3-NaCl system at 175 C may be considered as Na(+)AlCl4(-) with the dominant acid-base equilibrium given by 2 AlCl4(-) in chemical equilibrium with Al2Cl7(-) + Cl(-) K(m) = 1.06 x 10 to the -7th power. A number of organic solutes, particularly amines, have been studied. It was found that the radical cations of triphenylamine and N,N-dimethyl-aniline (DMA) are stabilized in the melt, with the stability clearly depending on the acidity of the melt. The oxidation of N,N,N',N'-tetramethylbenzidine (TMB) was studied; a chemical transformation of the dicomplexed amine to a monocomplexed amine precedes the oxidation of TMB. Sulfur has been quantitatively reduced in both acid and basic melts at 175 C. The solubility of metal sulfide in the system is dependent on the acidity of the melt. The sulfur electrode process appears to be: S2 + 4e in chemical equilibrium with 2S(2-).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1976
- Accession Number
- ADA051856
Entities
People
- R. A. Osteryoung
Organizations
- Colorado State University