Removal of peroxides from a methyl tertiary butyl ether recycle stream
CA 2087238 A1 · Owner: Texaco Petrochemical Inc. · Inventors: Knifton, John F.; Sanderson, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A, METHYL TERTIARY BUTYL ETHER RECYCLE STREAM (Docket No. 81,063 - F), ABSTRACT OF THE DISCLOSURE An MTBE recycle stream (which consists mainly of TBA and methanol) contaminated with residual amounts of tertiary butyl hydroperoxide, ditertiary butyl peroxide and allyl tertiary butyl peroxide can be effectively catalytically treated under mild conversion conditions with a nickel copper, chromium, iron catalyst in order to substantially completely decompose the peroxide contaminants and to thereby provide a treated MTBE recycle stream which is not only substantially free from contaminating quantities of such peroxides but which also, contains an enhanced amount of methyl tertiary butyl ether.
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 January 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- 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.