Catalyst for dehydrogenation of amino alcohols to amino carboxylic acids or of ethylene glycol (derivatives) to oxycarboxylic acids, method for their production and their use
CA 2265977 A1 · Owner: Eisenhuth, Ludwig · Inventors: Eisenhuth, Ludwig; Bergfeld, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a catalyst for dehydrogenation of amino alcohols to amino carboxylic acids or ethylene glycol (derivatives) to oxycarboxylic acids, containing zirconium, copper and eventually any other metal. Said metals are precipitated, purified, calcinated and reduced. The catalyst is produced by precipitating zirconium hydroxide with a base from an aqueous , solution of zirconium salt until a pH value of 4 to 10 is achieved. A copper salt aqueous solution and eventually an additional salt is added to the zirconium hydroxide suspension. Copper hydroxide and eventually the hydroxide of the metal contained in the other salt is precipitated by adding an , additional base …
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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 September 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2019.
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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.