Method and system for washing the internals of a vessel for processing a heavy hydrocarbon stream
CA 2490734 C · Owner: Shell Canada Ltd. · Inventors: Power, William James; Kaija, Steven Paul; Lacrampe, Marc Rene Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for washing the internals of a vessel for processing a heavy hydrocarbon stream such as a paraffinic diluent recovery column (1) in a bitumen refining plant comprises introducing a cleansing stream (3) comprising aromatic and/or naphthenic components into the vessel such that the cleansing stream flows along at least a substantial part of the surface of the internals of the vessel and flushes precipitated asphaltene deposits from said internals. The cleansing stream (3) may comprise an aromatic and/or naphthenic light gas oil (LGO) which is recycled from an atmospheric distillation column (2) in a bitumen refining plant.
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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 December 21, 2004 and granted February 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.