Preparation of cyclododecatriene
CA 1055052 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Sullivan, David L.; Rapoport, Morris
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for preparing 1,5,9-cyclododecatriene by contacting butadiene with a catalyst system resulting from the mixing of an aluminum composition of the structure Z(2.5-3.5)Al2Cl(3.5-2.5) wherein Z is selected from the group consisting of alkyl radicals containing from 2 to 4 carbon atoms and the phenyl radical; a titanium compound of the formula TiA4 wherein A is selected from the class consisting of C1, Br, I and OR wherein R is an organic radical of from 1 to 20 carbon atoms; and a promoter for the catalyst system wherein the promoter is selected from the group consisting of water, oxygen and oxygen-containing organic compounds, at a temperture in the range of 20 to 120°C. and at a …
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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 May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 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.