Method to improve halogenation reactions
US10011543B2 · kind B2 · utility
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4References
10Claims
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Key dates
| Filing date | Jul 20, 2016 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Jul 20, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the halogenation reaction of organic olefin compounds, an excess amount of halogen gas (fluorine, chlorine, vaporized bromine and iodine, or their combination) is normally used in order to achieve as complete as possible conversion of the organic starting material. In a conventional process, the excess halogen gas in the off-gas stream is scrubbed by caustic solution which increases the consumption of halogen and generates waste for disposal. The present invention provides a novel process to recover and reuse the excess halogen gas and thus reduce the operating cost of the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.