Process for producing 1,4-dioxane
CA 1298844 C · Owner: Dow Chemical (Nederland) B.V. · Inventors: Heuvelsland, Albert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an improved continuous process for producing 1,4-dioxane. Ethylene glycol, polyethylene glycol or a mixture thereof is dehydrated in a single phase liquid reaction medium containing an acid dehydration catalyst at a sub-atmospheric pressure and an elevated tempe,rature to produce l,4-dioxane. Surprisingly, the process substantially reduces foaming and formation of tars and increases productivity. 30,389-F
Read the whole patent
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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
- 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
Timeline From CIPO dates
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.