Catalyst for conversion of heavy hydrocarbon oils

Abstract

A catalyst and process are described for the conversion of heavy hydrocarbon oils comprising contacting the oil with hydrogen in the presence of a conversion catalyst containing a Group VI and/or VIII metal supported on a carrier preferably comprising silica and alumina, the catalyst having the following structural characteristics: 1. the silica (SiO.sub.2) content is 0 to 30% by weight of the total amount of an alumina-containing carrier, 2. the volume of the pores having a radius in the range from 0 to 300 A is greater than 0.30 ml/g, 3. the volume of the pores having a radius in the range from 0 to 30 A is less than 25% of the volume of the pores having a radius in the range from 0 to 300 A, 4. the volume of the pores having a radius in the range from 75 to 300 A is less than 40% of the volume of the pores having a radius in the range from 0 to 300 A, 5. the volume of the pores having a radius in the range from 75 to 75,000 A is smaller than 0.25 ml/g.

Dependencies are inferred from the claim text.