Patent · US Expired

Apparatus for the production of hexagonal phosphorus pentoxide

US4219533A · kind A · utility

8Cited by

2References

3Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Gerhard Hartlapp · Kornwestheim, DE
Werner Kowalski · Weilerswist, DE
Robert Queck · Wissen, DE
Theo Dahmen · Münstermaifeld, DE

Key dates

Filing date	Aug 11, 1978
Grant date	Aug 26, 1980
Priority date	—
Expiry date	Aug 11, 1998

Classification

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

Abstract

Hexagonal phosphorus pentoxide is made in an apparatus comprising a combustion chamber (1) which has a plurality of cooling pipes (10) disposed at its inside wall and is connected through a gas cooler (3) to a condensation chamber (4), the gas cooler (3) comprising a system of cooling pipes (5) which terminate, similarly to an open immersion tube, above the bottom portion of the condensation chamber (4), whose walls are provided with a cooling device (6).

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