Patent · US Expired

Method for producing coarsely crystalline alumina

US4130402A · kind A · utility

12Cited by

5References

9Claims

0Family size

Assignee

Guilini Chemie GmbH · DE

Inventors

Bernhard Schepers · Bergheim, DE
Heinz Hellinghausen · Ludwigshafen am Rhein, DE
Alois Kramer · Haßloch, DE

Key dates

Filing date	May 24, 1977
Grant date	Dec 19, 1978
Priority date	—
Expiry date	May 24, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/12
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Coarsely crystalline aluminum oxide is provided which contains the following trace elements: V.sub.2 O.sub.5 > 0.005 percent by weight, P.sub.2 O.sub.5 > 0.005 percent by weight, Na.sub.2 O > 0.8 percent by weight. A method is provided for producing such an aluminum oxide by calcining aluminum hydroxide in the presence of at least one flouride and of vanadium salt.

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