Generation of boron-trifluoride and sulphuric acid from boron trifluoride hydrate
US6641791B2 · kind B2 · utility
0Cited by
9References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 8, 1998 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to the preparation of BF3 and H2SO4 of commercial grade from boron trifluoride hydrate effluents containing organic impurities. The process consists essentially in reacting the said effluent with oleum, in recovering the gaseous boron trifluoride thereby liberated and in subjecting the sulphuric acid by-product to treatment with hydrogen peroxide and to purging with air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.