Catalyst molecular sieve and selective hydroisomerisation of long linear paraffins and / or slightly branched with this catalyst

A selective hydroisomerisation of compounds containing at least one n-alkane chain with more than 10 carbon atoms, wherein said compound to be treated is brought into contact with a catalyst comprising at least one element hydro-dehydrogenating and at least one molecular sieve with a mono or bidimensional pore network, the accessible pore openings are delimited by 10 oxygen atoms, and said bridge width distance between the pores being less than 0, 70 nm, and the zeolite is such that a catalyst subjected to a standard test isomerization of n-heptadecane present, for a conversion of 95%, an isomerized product selectivity of at least 70%, and the catalyst contains at least 5 wt% at least one hydro-dehydrogenating element chosen from the group formed by non noble metals of group VIII, metals of GVIB, and niobium, and the catalyst preferably contains phosphore.De preferably, the e sieve is a zeolite NU-10, NU-23, NU-87, EU-13 or Theta-1 or.