Patent ID: 7156978
Filing Date: 2007-01-02
Classification: C10G,Y10S

Abstract:
1. A process for producing middle distillates from a paraffin feed produced by the Fischer-Tropsch process, comprising the following successive steps: 1) fractionating (step a) the feed into at least three fractions: 2) hydrotreating (step b) at least a portion of said intermediate fraction then passing (step d) at least a portion of the hydrotreated fraction over an amorphous hydroisomerisation/hydrocracking catalyst under conditions favoring hydroisomerization over hydrocracking; 3) passing (step f) at least a portion of said heavy fraction over an amorphous hydrocracking/hydroisomerisation catalyst under conditions favoring hydrocracking over hydroisomerization with a conversion of 370° C.+ products into 370° C.− products of more than 80% by weight; 4) distilling (steps e and g) at least a portion of the hydrocracked/hydroisomerised fractions to obtain middle distillates.