Method of manufacturing pseudo-boehmite
US6429172B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1999 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/21
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Pseudo-boehmite, which is a raw material for a catalyst carrier for hydrogenation refining, is produced by mixing, under a predetermined condition, an aluminate aqueous solution produced from an alkaline etching step for aluminum in an alumite treatment and an acidic aluminum aqueous solution produced from an anodization step for aluminum in the alumite treatment. Pseudo-boehmite can be also produced by maturing, with an alkaline solution, an aluminum hydroxide sludge produced from a washing step for aluminum in the alumite treatment. It is possible to establish a method for producing pseudo-boehmite, which makes it possible to reutilize a resource at extremely low cost by utilizing a treatment waste liquid and a sludge in an alumite treatment site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.