Method for producing dry alkyl halides
CA 1065348 A · Owner: The Dow Chemical Company · Inventors: Nino, Guillermo J.; Panzarella, John E.; Steele, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing dry C1-C4 alkyl halides. The method is characterized by reacting the corresponding alkanol with a 10% excess of hydrogen halide at elevated temperature and pressure, where the major portion of the water produced is in the liquid phase; the gaseous alkyl halide-hydrogen halide reaction product is contacted with alkyl halide-hydrogen halide liquid reflux thereby drying, the reaction product, and the alkyl halide is separated from the hydrogen halide. The process avoids the use of sulfuric acid for drying, and results in the formation of only very small amounts of by-product dialkyl ether.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.