Controlled epoxidation of propylene
CA 2129711 A1 · Owner: Texaco Chemical Inc. · Inventors: Mueller, Mark Allan; Wu, Chung-Nan Tsai; Taylor, Mark Elliott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CONTROLLED EPOXIDATION OF PROPYLENE, (Docket No 81,154 -F ) ABSTRACT OF THE DISCLOSURE, In a regulated process wherein propylene is reacted with tertiary butyl hydroperoxide in solution in tertiary butyl alcohol to produce propylene oxide and tertiary butyl alcohol in a reactor system comprising a first isothermal segment comprising a plurality of at least four sequentially interconnected internally cooled reactors, and a second adiabatic segment, an initial feed mixture is continuously charged to the first reactor, comprising propylene and a recycle stream composed of about 25 to about 75 wt % of the combined weight of said propylene and said recycle stream a plurality of feed streams …
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
- Filed August 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2016.
- 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.