Method for manufacturing photocatalytic anatase titanium dioxide powder
US6306361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2000 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Mar 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for manufacturing an inexpensive and safe titanium dioxide powder having an excellent photocatalytic ability and a high purity of anatase phase crystalline structure by utilizing meta-titanic acid as a starting material is disclosed. Meta-titanic acid is first neutralized by a basic solution, followed by adding a metal oxide. Then, the meta-titanic acid is spray dried using hot air to obtain spherical shape granules. The granules are then sintered to obtain the resulting titanium dioxide powder having small sized porous second particles and a high specific surface area. As a result, an economical and highly effective photocatalytic titanium dioxide powder can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.