Method of preparing ultraphosphoric acid

Details Method of preparing ultraphosphoric acid Method of preparing ultraphosphoric acid

1980-04-09

1982-01-05

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423316, C01B 2516

Patent

active

043093949

ABSTRACT:
Ultraphosphoric acid containing a phosphorus to hydrogen ratio of greater than 1 can be prepared by bringing together in a reaction zone elemental phosphorus and a sufficient amount of oxygen in a free-oxygen containing gas to form phosphorus pentoxide, and a sufficient amount of water to form ultraphosphoric acid. The mole ratio of water to phosphorus pentoxide is maintained less than 1:1. Heat is removed from the product stream of the reaction zone to condense at least some of the ultraphosphoric acid which is then collected. In the preferred embodiment, a heat exchange fluid such as pressurized water is circulated through a cooling coil positioned to remove heat from the product stream of the reaction zone. The ultraphosphoric acid can be combined with water to provide polyphosphoric acid.

REFERENCES:
patent: 1823923 (1931-09-01), Wild et al.
patent: 2247373 (1941-07-01), Hartford et al.
patent: 2708620 (1955-05-01), Winnicki
patent: 3526482 (1970-09-01), Beltz et al.

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