FIELD: oil and gas industry.
SUBSTANCE: invention refers to catalysts intended to open naphthene rings. There described is catalyst for opening naphthene rings, which includes platinum component, ruthenic component and modifying component, and they are all dispersed on a substrate from high-melting non-organic oxide, and is characterised by the fact that at least 50% of platinum and ruthenic components is present in the form of particles, where on particle surface there is concentration of ruthenium, which is higher than that in the centre of particles. There also described is method for obtaining acyclic paraffins from cyclic ones, which involves contact of flow of raw material containing cyclic paraffins with the catalyst containing platinum component, ruthenic component and modifying component, and they are all dispersed on a substrate from high-melting non-organic oxide, in conditions of opening the ring in order to prevent at least some part of cyclic paraffins to acyclic paraffins; at that, catalyst is characterised by the fact that at least 50% of platinum and ruthenic components is in the form of particles, where on particle surface there is concentration of ruthenium, which is higher than that in the centre of particles.
EFFECT: increased synergism of Pt/Ru catalysts.
10 cl, 8 ex, 6 tbl, 2 dwg
