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Decomposition of thermally unstable chemicals in solvents
Author(s) -
Chervin Sima,
Evon Skip E.,
Bodman Glenn T.
Publication year - 1997
Publication title -
process safety progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.378
H-Index - 40
eISSN - 1547-5913
pISSN - 1066-8527
DOI - 10.1002/prs.680160314
Subject(s) - decomposition , differential scanning calorimetry , thermal decomposition , chemistry , solvent , kinetics , mixing (physics) , thermal stability , chemical process of decomposition , chemical decomposition , organic chemistry , chemical engineering , thermodynamics , physics , quantum mechanics , engineering
Knowledge of the decomposition reactions of chemicals when tested neat versus in mixtures with various solvents is essential for process safety studies. The decomposition of several mercaptotetrazole derivatives was studied by differential scanning calorimetry, both neat and in seven different solvents. Most mixtures exhibited destabilization of the chemical in the solvent compared with the neat material, resulting in a lower decomposition onset temperature in the mixture. It was demonstrated that the decomposition mechanism and kinetics changed significantly when these chemicals were mixed with solvents. The highly variable effects on thermal stability from mixing thermally unstable chemicals with solvents demonstrates the value of thermal stability testing of reaction mixtures as integral part of process hazard identification.