Multistep process for the manufacture of novel polyolefin lubricants from sulfur containing thermally cracked petroleum residua
CA 2004494 A1 · Owner: Chen, Frank J. · Inventors: Chen, Frank J.; Oswald, Alexis A.; Peng, Kuo L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multistep process is disclosed for the manufacture of synthetic lubricants from the C8 to C24 linear olefin components of below liquid fuel value petroleum distillate fractions derived via the high temperature thermal cracking of petroleum residua. Such feeds contain major amounts of 1-n-olefins, n-paraffins and greater than 0.1% concentration of sulfur mostly in the form aromatic thiophene type sulfur compounds. In the first step of the present process such feeds are enriched in the straight chain aliphatic hydrocarbon components by one or more separation processes, preferably via urea adduction or by crystallization. In the second step the, olefin components are oligomerized to sulfur …
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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 4, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2011.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.