Process for the manufacture of P 4 O 6

Details Process for the manufacture of P 4 O 6 Process for the manufacture of P 4 O 6

2011-07-12

2011-07-12

Langel, Wayne (Department: 1736)

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

Reexamination Certificate

active

07976811

ABSTRACT:
The invention relates to a process for the production of P4O6of high purity by reacting oxygen, or a mixture of oxygen and an inert gas, with gaseous or liquid phosphorus to generate said reaction product in a reaction unit. The reaction product is kept in the reaction unit at an average temperature in the range of 1600 and 2000 K by removing the heat created by the exothermic reaction of phosphorus and oxygen. A residence time of at least 1 second of the reaction product passing the reaction unit is maintained. The reaction product is then conventionally cooled in a quenching unit connected with the reaction unit. The final reaction product contains P4O6with a very low content of elemental phosphorus.

REFERENCES:
patent: 3532461 (1970-10-01), Whyte et al.
patent: 3652211 (1972-03-01), Mezey et al.
patent: 3652213 (1972-03-01), Krause et al.
patent: 1172241 (1964-06-01), None
patent: 216516 (1984-12-01), None
patent: 292637 (1991-08-01), None
Miller, Christina C. “The slow oxidation of phosphorus. II The oxidation nproducts of phosphorus and phosphorous oxide”, Journal of the Chemical Society (1929), 1829-46.

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