Method for producing hydrogen and a hydroprocessed product from a hydrocarbonaceous
feedstock by subjecting it to a catalytic hydrocracking treatment using hydrogen
which has been at least partly produced from hydrocracked feedstock and subjecting
at least pan of the hydrocracked feedstock, after having subjected it to a separation
treatment in the event that hydroprocessed product is to be recovered, to a treatment
to produce hydrogen in a single operation which hydrogen is at least partly recovered
as product.