A method of preparing a vinyl acetate catalyst employing an alkali metal borate
CA 2249187 A1 · Owner: Colling, Philip M. · Inventors: Colling, Philip M.; Nicolau, Ioan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing an unsaturated ester synthesis catalyst wherein a catalytic carrier is impregnated with a water-soluble palladium salt and a water-soluble gold compound followed by precipitating the water-soluble palladium salt and the water-soluble gold compound to water-insoluble palladium and gold compounds with a fixing composition containing an alkali metal borate. The fixed palladium and gold compounds are reduced to palladium and gold metal with ethylene or hydrazine followed by impregnating the carrier with an alkali metal acetate such as potassium acetate. The unsaturated ester synthesis catalyst can be employed to synthesize vinyl acetate with reduced heavy ends.
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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 March 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2019.
- 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
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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.