Flexible process for producing base stock and distillates by conversion-hydroisomerisation using a catalyst with low dispersion followed by catalytic dewaxing

A process for producing oils from a hydrocarbon feed containing at least 20% by volume of compounds boiling above 340° C., said process comprising the following steps in succession:

• (a) converting the hydrocarbon feed at least partially to lower boiling molecules with simultaneous hydroisomerisation of at least a portion of n-paraffins of the feed, said feed having a sulphur content of less than 1000 ppm by weight, a nitrogen content of less than 200 ppm by weight, a metals content of less than 50 ppm by weight, and an oxygen content of at most 0.2% by weight, in the presence of a non-zeolitic catalyst containing at least one noble metal deposited on an amorphous acidic support, the dispersion of the noble metal being less than 20%;
• and
• (b) catalytic dewaxing of at least a portion of the effluent from step a), in the presence of a catalyst comprising at least one hydrodehydrogenating element and at least one molecular sieve.