Methods and processes of preparing aluminum hydroxide and aluminum oxide
US10315927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2015 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Jan 14, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/77
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing high-purity aluminum hydroxide and alumina material is disclosed, which includes the steps of: reacting aluminum metal with a mixture of organic base and water to form aluminum hydroxide suspension; removing water by filtration to form aluminum hydroxide slurry, and for manufacturing alumina material, further drying/baking the slurry to form aluminum oxide powders. The method is amenable to mass production of high-purity aluminum hydroxide and aluminum oxide containing total silica and non-aluminum metal impurities less than 0.005% and having a bulk density higher than 3.0 g/cc. In addition, the invention also provides high-purity aluminum hydroxide and aluminum oxide prepared by using the method disclosed and bulk products prepared therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.