Method for preparing hydrogenation purification catalyst
CA 2727654 C · Owner: Jx Nippon Oil & Energy Corporation · Inventors: Nakaoka, Chikanori; Saito, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is used to produce a hydrorefining catalyst containing an inorganic oxide carrier and a hydrogenation-active metal in which pores having pore diameters of not more than 50 nm have a pore volume of not less than 0.4 cm3/g pores having pore diameters of not less than 50 nm have a pore volume of not less than 0.2 cm3/g and pores having pore diameters of not less than 1000 nm have a pore volume of not more than 0.1 cm3/g. The method comprises the steps of mixing and forming a pseudo-boehmite powder which has a phase transition temperature to .alpha.-alumina of 1220 to 1240 °C; and calcinating the formed pseudo-boehmite under a condition in which the pseudo-boehmite is converted into …
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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 February 5, 2003 and granted August 5, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2025.
- 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.