Process for preparing chlorodiphenylphosphane
CA 1202322 A · Owner: Hoechst Aktiengesellschaft · Inventors: Kleiner, Hans-Jerg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chlorodiphenylphosphane is prepared by reacting dichlorophenylphosphane with triphenylphosphane at temperatures between about 300 and 700°C. In the temperature range from about 300 to 500°C, this reaction is preferably carried out under elevated pressure in particular, under the autogenous pressure which becomes established in a sealed system, while atmospheric pressure is preferably used in the temperature range from about 500 to 700°C. The reaction product chlorodiphenylphosphane is in the main an intermediate in various fields such as, for example, the polymer sector.
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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 March 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2003.
- 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.