FIELD: chemistry.
SUBSTANCE: present invention relates to a method and catalyst composition, used in hydroconversion of heavy hydrocarbon starting material. A catalyst composition is described, which is suitable for use in hydroconversion of heavy hydrocarbon starting material. The said catalyst composition contains: a component based on a group VIB metal; a component based on a group VIII metal; a component based on phosphorus; and carrier material, which contains aluminium oxide, where the said carrier material is characterised by average pore diametre ranging from 100 Å to 140 Å, pore size distribution width less than 33 Å, and pore volume at least equal to 0.7 cm3/g, where less than 5% of the said pore volume in the said carrier material is made up of pores in the said carrier material, exceeding 210 Å, and the carrier material contains less than 3 wt % silicon dioxide. A method of hydroconversion of heavy hydrocarbon starting material is also described, where the said method involves the following stage: bringing the said heavy hydrocarbon starting material into contact with the above mentioned catalyst in suitable conditions, where the said catalyst is effective in hydroconversion of at least part of the said heavy hydrocarbon starting material, obtaining lighter hydrocarbons. A composition is also described, which is suitable for use as a component of the carrier material based on aluminium oxide or a catalyst composition, meant for use during hydroconversion of heavy hydrocarbon starting material, where the said composition contains: aluminium oxide, which enables obtaining the said carrier material based on aluminium oxide which has pores which are characterised by average diametre in the range from 100 Å to 140 Å, pore size distribution width less than approximately 33 Å, pore volume at least equal to 0.75 cm3/g where less than 5% of the said pore volume is made up of the said pores with diametre exceeding 210 Å, and where the carrier material contains less than 3 wt % silicon dioxide.
EFFECT: catalyst compositions with improved catalyst activity and stability with respect to hydroconversion of heavy hydrocarbon starting material.
8 cl, 5 tbl, 3 dwg, 6 ex
