Methods for decomposing esters and purifying alcohols
CA 2307803 A1 · Owner: Smith, William A. · Inventors: Knifton, John F.; Sanderson, John R.; Smith, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tertiary butyl alcohol charge stock typically contaminated with from about 0.5 to about 2 wt.% of formates and peroxides is passed through an oxygenates , decomposition reactor containing a bed of a decomposition catalyst comprising rhodium, platinum, palladium or mixture thereof at a temperature of from about 100 to about 280 ~C to decompose the peroxides and formates and to dehydrate , a portion of the tertiary butyl alcohol to form isobutylene and water to thereby form a non-corrosive tertiary butyl alcohol feedstock that is substantially free from formates that is suitable for reaction with methanol in a methyl tertiary butyl ether etherification reactor to form a noncorrosive …
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 November 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2020.
- 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.