Patent · US Expired

Production of phosphorus pentoxide with utilization of reaction heat

US4379131A · kind A · utility

6Cited by

1References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hellmuth Daniel · Lechenich, DE
Robert Queck · Wissen, DE
Bernhard Kuxdorf · Münstermaifeld, DE
Herbert Pusche

Key dates

Filing date	Aug 28, 1981
Grant date	Apr 5, 1983
Priority date	—
Expiry date	Aug 28, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B25/12
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to process for making phosphorus pentoxide by subjecting elementary phosphorus to a combustion reaction with the aid of air, the reaction heat being utilized for the production of energy. To this end, the invention provides for the phosphorus to be subjected to combustion with dry air containing, per m.sup.3, 5 g down to 0.01 g of water, inside a combustion chamber of which the metallic walls are arranged so as to form a cooling system with cavities therein and for a liquid and liquid/steam-mixture, respectively, to be circulated through the cooling system under pressure within the range 1 to 150 bars, the liquid or mixture assuming a temperature of more than 150.degree. C. up to 500.degree. C. Steam which is formed in the cooling system is continuously taken therefrom and replaced by an equivalent proportion of fresh liquid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.