Cyclic phosphonitrilic halide process

Details Cyclic phosphonitrilic halide process Cyclic phosphonitrilic halide process

1985-11-18

1987-04-07

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

C01B 2510

Patent

active

046560181

ABSTRACT:
Cyclic phosphonitrilic halide trimer is made in high yield and at a rapid rate by adding NH.sub.3 or ammonium halide to a pyridine-hydrogen halide complex and adding phosphorus pentahalide and a solvent for the trimer (e.g. monochlorobenzene) and heating the mixture to above 90.degree. C. to form trimer which dissolves in the solvent and then separating the trimer-solvent phase from the residue phase of pyridine-hydrogen halide complex and recovering trimer from the solvent phase and recycling the pyridine-hydrogen halide phase to a subsequent procedure conducted in the same manner. The process can also be adapted to produce linear species in high yield also.

REFERENCES:
patent: 4567028 (1986-01-01), Tanino et al.
Sulkowski et al., Chem. Stos. 26 (2), 245-252 (1982).

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