Disposal of waste aqueous boron trifluoride solutions
US4911758A · kind A · utility
2Cited by
7References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Boron trifluoride wash water from an olefin oligomerization process can be disposed of in an environmentally safe manner by hydrolysis to substantially eliminate fluoroborate anions (BF.sub.4 --), mixing with CaO or Ca(OH).sub.2 and concentration in any sequence followed by mixing with portland cement and solidification. The cured cement is highly resistant to aqueous leach of boron and fluorine containing products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.