Tert-butylamine synthesis over dealuminated y-type zeolites
CA 2086814 A1 · Owner: Dai, Pei-Shing E. · Inventors: Knifton, John F.; Benac, Brian L.; Dai, Pei-Shing E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TERT-BUTYLAMINE SYNTHESIS OVER DEALUMINATED Y-TYPE ZEOLITES (D# 81,199-F), ABSTRACT OF THE DISCLOSURE Disclosed is a method for preparation of alkylamines particularly t-butylamine, which comprises reacting ammonia and a monounsaturated or polyunsaturated olefin having 2 to 10 carbon atoms in the presence of a dealuminate Y-zeolite prepared in a, manner selected from:, 1. Ammonium exchanging followed by calcinating; 2. Chelating the alumina with, ethylenediaminetetraacetic acid; 3. Treating the Y-zeolite with a fluorine-containing compound. 4. Treating the Y-zeolite with steam or acid or a combination of steam and acid.
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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
- Filed January 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2015.
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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.