Process for preparing a lubricating base oil and a gas oil

Abstract

Process for preparing a lubricating base oil and a gas oil by contacting, under catalytic dewaxing conditions, a petroleum derived wax with a catalyst composition comprising at least a hydrogenation component, a binder and zeolite crystallites having pores consisting of 12 oxygen atoms, wherein the zeolite crystallites have a constrain index (CI) larger than 1 and wherein from the effluent of the process a base oil fraction and a gas oil fraction is isolated and wherein the gas oil yield is larger than the yield to the fraction boiling below the gas oil fraction.

That which is claimed is:  
     
         1 . A process for preparing a lubricating base oil and a gas oil by contacting, under catalytic dewaxing conditions, a petroleum derived wax with a catalyst composition comprising at least a hydrogenation component, a binder and zeolite crystallites having pores consisting of 12 oxygen atoms, wherein the zeolite crystallites have a constrain index (CI) larger than 1 and wherein from the effluent of the process a base oil fraction and a gas oil fraction is isolated and wherein the gas oil yield is larger than the yield to the fraction boiling below the gas oil fraction.  
     
     
         2 . A process according to  claim 1 , wherein the wax feed has an oil content of between 0 and 50 wt %.  
     
     
         3 . A process according to  claim 2 , wherein the wax feed has an oil content of between 0 and 20 wt %.  
     
     
         4 . A process according to  claim 3 , wherein the wax feed is a slack wax or a foots oil.  
     
     
         5 . A process according to  claim 4 , wherein the wax feed contains less than 10 ppmw organic nitrogen.  
     
     
         6 . A process according to  claim 5 , wherein the zeolite crystallites have a constrain index (CI) larger than 1.5.  
     
     
         7 . A process according to  claim 6 , wherein the zeolite crystallites have a constrain-index (CI) smaller than 7.  
     
     
         8 . A process according to  claim 7 , wherein the zeolite is of the OFF or MTW type.  
     
     
         9 . A process according to  claim 8 , wherein the zeolite content is in the range of from 5 to 35 wt %.  
     
     
         10 . A process according to  claim 9 , wherein the binder is silica.