C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/101
C10G 47/18 (2006.01) C10G 45/64 (2006.01) C10G 65/04 (2006.01) C10G 65/12 (2006.01)
Patent
CA 1285236
PROCESS FOR PRODUCING A PRODUCT HYDROCARBON HAVING A REDUCED CONTENT OF NORMAL PARAFFINS ABSTRACT OF THE DISCLOSURE A waxy hydrocarbon feedstock is converted into a product hydrocarbon of reduced normal paraffin content by either dewaxing or hydrodewaxing the feedstock in the pres- ence a dewaxing or hydrodewaxing catalyst under conditions such that the normal paraffin content of the feedstock is reduced by selectively converting waxy paraffins into lower molecular weight hydrocarbons. At least a portion of the effluent from the dewaxing or hydrodewaxing zone is then passed to a hydrocracking zone where it is contacted with a hydrocracking catalyst in the presence of hydrogen under conditions such that a further reduction in the normal par- affin content is effected. When the desired product is a lube oil base stock, the overall conversion of components in the feed boiling above about 650° F. to components boiling at or below about 650° F. that takes place in the dewaxing or hydrodewaxing step and the hydrocracking step combined is no more than about 20 volume percent, preferably no more than about 10 volume percent. When the desired product is a mid- dle distillate, the overall conversion of feedstock constit- uents in the dewaxing or hydrodewaxing step and the hydro- cracking step combined to components boiling below about 300° F. is no more than about 25 volume percent, preferably no more than about 15 volume percent.
526643
Fetherstonhaugh & Co.
Union Oil Company Of California
Ward John W.
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