Essentially pure/colorless P.sub.2 NOCl.sub.5
AssigneeAtochem
InventorsGuy Pagniez, Philippe Potin
Life of this patent
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Abstract
Essentially pure and colorless N-(dichlorophosphoryl)trichlorophosphazene [P.sub.2 NOCl.sub.5 ] is prepared/purified under relatively moderate conditions, by reacting phosphorous pentachloride with ammonium chloride, treating the resulting medium of reaction, containing P.sub.3 NCl.sub.12, with SO.sub.2, and thin film evaporating the medium of reaction, advantageously in two stages, to eliminate SO.sub.2, POCl.sub.3 and SOCl.sub.2 values therefrom.
Claims4
A process for the preparation of N-(dichlorophosphoryl)trichlorophosphazene (P.sub.2 NOCl.sub.5), comprising (i) reacting phosphorus pentachloride with ammonium chloride in the presence of POCl.sub.3, (ii) treating the resulting medium of reaction, containing P.sub.3 Cl.sub.12, with SO.sub.2 to obtain P.sub.2 NOCl.sub.5 and SOCl.sub.2, and (iii) thin film evaporating said medium of reaction to eliminate SO.sub.2, POCl.sub.3 and SOCl.sub.2 values therefrom.
Dependencies are inferred from the claim text.