Base oil upgrading by co-feeding a ketone or beta-keto-ester feedstock
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United States of America Patent
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Aug 25, 2015
Grant Date -
Mar 26, 2015
app pub date -
Dec 4, 2014
filing date -
Sep 13, 2012
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Abstract
This invention discloses a process for making high viscosity index lubricating base oils having a viscosity index of at least 110 by co-feeding a ketone or a beta-keto-ester feedstock with a lubricant oil feedstock directly to a hydrocracking unit to produce a hydrocracked stream. Then at least a portion of the hydrocracked stream is treated under hydroisomerization conditions to produce a high viscosity index lubricating base oil. The process may involve bypassing a hydrotreating or hydrofinishing step, which may result in improved efficiency and economics in producing high viscosity index lubricating base oils.
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