Dewaxing by isomerization
AssigneeMobil Oil Corporation
InventorsClarence D. Chang, David S. Shihabi, Paul B. Weisz
Life of this patent
Estimating the term…
Abstract
A process is provided for dewaxing hydrocarbon feedstock by isomerizing the waxy components of the feedstock over catalyst comprising a siliceous zeolite having been prepared by the method comprising providing a boron-containing zeolite Beta, treating the zeolite with silicon tetrachloride at a temperature and for a time sufficient to replace boron with silicon, and recovering the siliceous zeolite having reduced boron content but substantially preserved initial aluminum content.
Claims14
A process for dewaxing a hydrocarbon feedstock containing paraffins which comprises contacting the feedstock under isomerization conditions with a catalyst comprising a hydrogenation component and siliceous zeolite having been prepared by a method comprising providing a boron-containing zeolite Beta with initial boron and aluminum contents each greater than the numeral 0, treating the zeolite with silicon tetrachloride at a temperature and for a time sufficient to replace boron with silicon, and recovering the siliceous zeolite having reduced boron content but substantially preserved initial aluminum content.
Dependencies are inferred from the claim text.