The chromatographic separation ofN-nitroso-N-ethylaniline and some of its nitro derivatives from propellant explosives
✍ Scribed by Parker, C. A.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1948
- Weight
- 403 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0368-4075
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✦ Synopsis
A full discussion of the mechanism of the gelling must depend upon a knowledkc of the four component system B,O, -P,O, -SO,-H,O, but at the present time this is lacking. Investigation of the three component systems B,O, -P206--H,O and B,O, -SO, -H,O is still incomplete, but on the basis of the work of M. LevF and of E. Griincr,G a possible qualitative explanation of the results may be given as follows.
In concentrated sulphuric acid, combination occurs between borif'and sulphuric acids with elimination of water. The resulting boryl sulphate '' (for which at least six different formulae have been suggested at various times) can react with phosphoric acid in sulphuric acid with elimination of more water to give a gel of boron phosphate. The presence of much water in the sulphuric acid prevents this elimination of water, or if added to the gel causes a partial hydrolysis to smaller aggregates of hydrated boron phosphate (such as Griincr suggested) which are less soluble in, say, 85% sulphuric acid. More water hydrolyses the hydrated boron phosphate completely into its constituent acids yielding a clear solution.
Acknowledgements
This work was begun at Medway Technical College, Gillingham, and finished at Woolwich Polytechnic, and the author is indebted to the Heads of the Chemistry Departments (Dr. H. I.
Stonehill and Dr. A. I. Vogel, respectively) for encouragement and laboratory facilities.