Chemistry of inorganic compounds – Phosphorus or compound thereof – Elemental phosphorus
Patent
1980-04-04
1981-09-01
Vertiz, O. R.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Elemental phosphorus
423299, 423300, C01B 2501, C01B 2502, C01B 2504, C01B 2510
Patent
active
042871654
ABSTRACT:
High purity phosphorus and phosphorus compounds are prepared by first reacting H.sub.3 PO.sub.4 with a lead compound such as PbO to form Pb.sub.3 (PO.sub.4).sub.2. The Pb.sub.3 (PO.sub.4).sub.2 is reduced with H.sub.2 at a temperature sufficient to form gaseous phosphorus which can be recovered as a high purity phosphorus product. Phosphorus compounds can be easily prepared by reacting the phosphorus product with gaseous reactants. For example, the phosphorus product is reacted with gaseous Cl.sub.2 to form PCl.sub.5. PCl.sub.5 is reduced to PCl.sub.3 by contacting it in the gaseous phase with solid elemental phosphorus. POCl.sub.3 can be prepared by contacting PCl.sub.5 in the gaseous phase with solid P.sub.2 O.sub.5. The general process is particularly suitable for the preparation of radiophosphorus compounds.
REFERENCES:
patent: 3511599 (1970-05-01), Suriani
Hulter, Contribution a l'Etude de l'Action de l'Hydrogen sur les Phosphates An. de Chim, June 1953.
Rupp Arthur F.
Woo David V.
Denny James E.
Hamel Stephen D.
Heller Gregory A.
The United States of America as represented by the United States
Uzzell Allen H.
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