Catalytic dewaxing of hydrocarbon feedstocks
AssigneeExxonMobil Research and Engineering Company
InventorsJoseph E. Gatt, William W. Lonergan, Scott J. Weigel, Ivy D. Johnson, Karl G. Strohmaier, Simon C. Weston
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Abstract
In a process for improving the cold flow properties of a hydrocarbon feedstock, the feedstock is contacted with a catalyst composition comprising an EMM-17 molecular sieve and a hydrogenation component under dewaxing conditions effective to produce a dewaxed product having a cloud point and/or pour point that is reduced relative to the cloud point and/or pour point of the feedstock by at least 5° C.
Claims18
A process for improving the cold flow properties of a hydrocarbon feedstock, the process comprising:
- contacting a feedstock comprising a sulfur content of greater than 10 ppm by weight and a nitrogen content of greater than 10 ppm by weight with a catalyst composition comprising an EMM-17 molecular sieve and a hydrogenation component under dewaxing conditions effective to produce a dewaxed product having a cloud point and/or pour point that is reduced relative to the cloud point and/or pour point of the feedstock by at least 5° C.
A process for improving the cold flow properties of a hydrocarbon feedstock, the process comprising:
- (a) contacting the feedstock with a first hydrotreating catalyst composition under conditions effective to reduce at least one of the sulfur, nitrogen or aromatic content of the feedstock and produce a hydrotreated product comprising no more than 10 ppm by weight of nitrogen and no more than 10 ppm by weight of sulfur;
- and
- (b) contacting the hydrotreated product with a second catalyst composition different from the first catalyst composition and comprising an EMM-17 molecular sieve and a hydrogenation component under dewaxing conditions effective to produce a dewaxed product having a cloud point and/or pour point that is reduced relative to the cloud point and/or pour point of the feedstock by at least 5° C.
Dependencies are inferred from the claim text.