Method for controlling sedimentation in an ebullated bed process
CA 2003454 C · Owner: Texaco Development Corporation · Inventors: Sayles, Scott Michael; Bellinger, Michael Peter; Livingston, William Bethart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
METHOD FOR CONTROLLING SEDIMENTATION, IN AN EBULLATED BED PROCESS (D#79,086-F), ABSTRACT OF THE DISCLOSURE In an ebullated bed process, it has been found that in switching from one sediment yielding feedstock to a second sediment yielding feedstock that the transient sediment concentration is 5 to 8 times the steady state concentration. Such transients have caused unit shutdowns with lost production time. A method has been found which avoids these high transient sediment concentrations. Second feedstock is added incrementally (1 vol% to 2 vol% of the final rate) over the period of a week or more and sediment in the product analyzed. After full second feedstock rate is achieved first …
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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 November 21, 1989 and granted May 17, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.