The invention relates to a high-selectivity non-precious-
metal long-chain
alkane isomerization catalyst and a preparation method of the high-selectivity non-precious-
metal long-chain
alkane isomerization catalyst. The catalyst contains SAPO-11 / 31 / 41 or modified ZSM-22 / 23
molecular sieve, a VIBth or VIIIth hydrogenated active
metal component, inorganic refractor
oxide and the like. The preparation method of the catalyst comprises the following steps of preparing porous CoMoNiW
oxide, and synthesizing SAPO-11 / 31 / 41 or modifying ZSM-22 / 23; mixing the
molecular sieve and inorganic
refractory oxide, adding a peptizing agent, water and an
extrusion assistant, and extruding the mixture into cream; mixing the CoMoNiW oxide and the cream, and extruding the mixture into strips; and finally
drying and baking the strips to obtain the catalyst. The method can be used for preparing the catalyst with different hydrogenated
active component contents and especially with high hydrogenated component content. The prepared catalyst adopts the non-
precious metal as a hydrogenated component, the specific surface area and pore volume are large, the catalyst pore canals are smooth, and the catalyst is applicable to the more than C7 long-chain
alkane isomerization reaction, good in activity and high in isomerization selectivity.