A silver-catalyst composition, a process for preparing the catalyst composition and a use of the catalyst composition for the epoxidation of ethylene
CA 2520786 C · Owner: Hess, Martin Lysle · Inventors: Hess, Martin Lysle; Richard, Michael Alan; Matusz, Marek
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A catalyst composition comprising a support having a surface area of at least 500 m2/kg, and deposited on the support: - silver metal - a metal or , component comprising rhenium tungsten, molybdenum or a nitrate- or nitriteforming compound, and - a Group IA metal or component comprising a Group IA metal having an atomic number of at least 37 and in addition potassium, wherein the value of the expression (Qk / R) + QHIA is in the range of from 1.5 to 30 mmole/kg, wherein QHIA and QK represent the quantities in mmole/kg of the Group IA metal having an atomic number of at least 37 and potassium respectively, present in the catalyst composition the ratio of QHIA to QK is , at least 1:1 the …
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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.
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- Filed March 30, 2004 and granted March 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2026.
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