Production of boric oxide
US5424052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1993 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B35/1036
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Amorphous boric oxide-containing product having about 85 to 92% B.sub.2 O.sub.3 is produced by heating boric acid at an elevated temperature of up to about 275.degree. C. to dehydrate the boric acid and form a molten glass which is cooled to a solid glassy product. This solid glass can be comminuted to produce a particulate product. Preferably the boric acid is heated at 220.degree. to 275.degree. C., with about 250.degree. to 270.degree. C. being most preferred. The process is readily adapted to a continuous process in which the boric acid is placed on a moving continuous steel belt and conveyed through a heating zone. The molten glassy product is cooled to form a solid glassy product which is removed from the belt and comminuted to a desirable particle size range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.