Chemistry of inorganic compounds – Phosphorus or compound thereof – Halogen containing
Patent
1984-11-16
1986-08-12
Doll, John
Chemistry of inorganic compounds
Phosphorus or compound thereof
Halogen containing
23293R, C01B 2510
Patent
active
046055398
ABSTRACT:
Polymer-grade cyclic phosphonitrilic chloride trimer can be obtained from crude cyclic polyphosphonitrilic chlorides by forming a solution of the crude cyclics, water washing the solution, distilling solvent to form a hot concentrate, cooling to form a precipitate and distilling the precipitate to form polymer-grade trimer.
REFERENCES:
patent: 4175113 (1979-11-01), Fieldhouse
patent: 4382914 (1983-05-01), Horie et al.
Adams, Jr. J. Robert
Juneau Matthew K.
Mitrano James R.
Doll John
Ethyl Corporation
Johnson Donald L.
Langel Wayne A.
Odenweller Joseph D.
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