METHOD FOR PRODUCING LUBRICATING BASE OIL WITH LOW CLOUD POINT AND HIGH VISCOSITY INDEX
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United States of America Patent
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Issued Date -
Sep 26, 2013
app pub date -
Jun 3, 2011
filing date -
Sep 7, 2010
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Abandoned
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Abstract
The present invention relates to a method for producing lubricating base oil with a low cloud point and a high viscosity index. In the method, a lubricating base oil with a low pour point, a low cloud point and a high viscosity index is produced by a hydrorefining-isomerization/asymmetrical cracking-hydrofinishing in the presence of hydrogen, wherein a highly waxy heavy fraction oil having an initial boiling point of 300° C. to 460° C., a wax content of 5% or more, a pour point of −20° C. or more and a cloud point of −5° C. or more is used as a raw material, and naphtha and middle fraction oil being co-produced. The method is characterized mainly in the high yield of heavy base oil, a low pour point and cloud point, a high viscosity and viscosity index of the base oil.
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