Dual catalyst system for hydroisomerization of fischer-tropsch wax
CA 2500456 A1 · Owner: Hoglen, Larry E. · Inventors: Partridge, Randall D.; Jiang, Zhaozhong; Helton, Terry E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for converting Fischer~Tropsch wax to high quality lube basestocks using a molecular sieve Beta catalyst followed by a unidimensional intermediate pore molecular sieve with near circular pore structures having an average diameter of 0.50 run to 0.65 nm wherein the difference between the maximum diameter and the minimum is <= 0.05 nm. Both catalysts comprise one or more Group VIII metals. For example a cascaded two-, bed catalyst system consisting of a first bed Pt/Beta catalyst followed by a second bed Pt/ZSM-48 catalyst is highly selective for wax isoinerization and lube hydrodewaxing with minimal gas formation.
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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 October 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2025.
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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.