𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The non-oxidative decomposition of heated sodium dithionite

✍ Scribed by Goodhead, Kenneth ;O'Neill, Ian K. ;Wardleworth, Dion F.

Publisher
Wiley (John Wiley & Sons)
Year
2007
Tongue
English
Weight
448 KB
Volume
24
Category
Article
ISSN
0375-9210

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The non‐oxidative decomposition of heated sodium dithionite was shown by thermal and i.r. spectroscopic analyses to proceed by two routes depending on sample configuration. The previously postulated reaction
predominated when the heaped substance was heated at 16 Β°C/min giving a sudden exotherm of 47 kJ mol^βˆ’1^ at 205 Β°C. In other conditions, particularly when heated in thin layers, two exotherms were found. The major exotherm at 210 Β°C yielded 63 kJ mol^βˆ’1^ the main products being thiosulphate, trithionate, sulphate and sulphite. A subsequent exotherm at 250 Β°C appeared to arise from phase changes in this material, coincident with the endothermic decomposition of sodium trithionate.

πŸ“œ SIMILAR VOLUMES

Influence of polyacrylamide on the oxida
Influence of polyacrylamide on the oxidative decomposition of sodium dithionite: Implications for vat dyeing processes
✍ J. N. Etters πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 432 KB πŸ‘ 1 views

A statistical analysis was made of the halftimes of oxidative decomposition of sodium dithionite at 25Β°C in alkaline aqueous solutions, having geometrically spaced specific surfaces and concentrations of polyacrylamide. The analysis reveals a strong relationship between solution-specific surface and