Preparation of n-dichlorophosphinylimidophosphoric trichloride

Claim 1

THE PROCESS FOR THE PRODUCTION OF N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE COMPRISING THE STEPS OF (1) REACTING PHOSPHORUS PENTACHLORIDE WITH AMMONIUM CHLORIDE IN A LIQUID CARRYING MEDIUM SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS OXYCHLORIDE, NDICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE, AND SOLUTIONS OF PHOSPHORUS OXYCHLORIDE AND N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE, AT A TEMPERATURE IN THE RANGE OF 60* TO 105*C; (2) TREATING THE REACTION MIXTURE WITH PHOSPHORUS PENTOXIDE AT A TEMPERATURE IN THE RANGE OF 55* TO 85*C., THEREBY PRODUCING A CLEAR SOLUTION OF N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE AND PHOSPHORUS OXYCHLORIDE; AND (3) REMOVING THE PHOSPHORUS OXYCHLORIDE FROM THE SOLUTION BY DISTILLING UNDER VACUUM, THEREBY OBTAINING SUBSTANTIALLY PURE N-DICHLOROPHOSPHINYLIMIDOPHOSPHORIC TRICHLORIDE.