Patent · US Expired

Titanium dioxide methods of production

US6660243B1 · kind B1 · utility

4Cited by

1References

3Claims

0Family size

Assignee

Sachleben Chemie GmbH · DE

Inventors

Bernd Proft · Neukirchen-Vluyn, DE
Elke Hirschberg · Moers, DE
Barbara Seling · Ellwangen, DE
Sonja Weyand · Duisburg, DE

Key dates

Filing date	Nov 20, 2001
Grant date	Dec 9, 2003
Priority date	—
Expiry date	Nov 20, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B35/46
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The bodies are prepared either by pelleting of a pasty mixture of titanium dioxide powder and titanium dioxide sol and/or 1-20% nitric acid, followed by dehydration and calcination at a temperature of between 400 and 1000° C. for between 0.5 and 3.5 hours; or by preparing pellets from the titanium dioxide powder and added water, annealing of the pellets at between 300 and 500° C., saturation of same with titanium dioxide sol or 1-20% nitric acid in a vacuum, followed by drying and finally annealing at a temperature of between 400 and 1000° C. for between 0.5 and 3 hours.

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