Patent · US Expired

Preparation of phosphates by induction melting

US5030430A · kind A · utility

1Cited by

4References

22Claims

0Family size

Assignee

RHONE-POULENC CHIMIE · FR

Inventors

Paul Michel · Gosselies, BE
Francoise Seon · Montreuil, FR
Rene Perrier de la Bathie · Chambéry, FR

Key dates

Filing date	Jul 13, 1989
Grant date	Jul 9, 1991
Priority date	—
Expiry date	Jul 13, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B25/445
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Phosphates, e.g., the polyphosphates and halophosphates, are prepared in high purity by melt thermocondensing corresponding precursors thereof, e.g., salts of orthophosphoric, pyrophosphoric or metaphosphoric acid, via electromagnetic induction heating, for example in an auto-crucible furnace.

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