Method to Improve Halogenation Reactions
AssigneeHoneywell International Inc.
InventorsTerris Yang, Hsueh Sung Tung
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Abstract
In the halogenation reaction of olefin/halo-olefin (i.e., organic), 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. 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.
Claims15
A process for the halogenation reaction of an organic starting material comprising olefin or halo-olefin compounds comprising the steps of:
- (a) conducting the halogenation reaction of the organic starting material in a first reactor using excess halogen, and
- (b) conducting the halogenation reaction of the organic starting material in a second reactor using the excess halogen from step (a) to halogenate an excess amount of the organic starting material contained in the second reactor.
Dependencies are inferred from the claim text.