Abstract: A process for converting hydrocarbon oils into products of lower average molecular weight and lower boiling point comprising contacting a hydrocarbon oil containing less than 200 ppm N at elevated temperature and pressure in the presence of hydrogen with a catalyst A comprising a wide pore zeolite, a binder and at least one hydrogenation component of a Group VI and/or Group VIII metal, wherein the hydrocarbon oil is subsequently, without intermediate separation or liquid recycle, contacted with an amorphous silica-alumina containing catalyst B comprising at least one hydrogenation component of a Group VI and/or Group VIII metal.

Abstract: The invention relates to a process for the preparation of a shapable dough which comprises mixing and kneading a particulate titania with water and an alkanolamine or ammonia or an ammonia- releasing compound to obtain a mixture having a total solids content of from 50 to 85% by weight, the alkanolamine or ammonia being present in an amount of from 0.5 to 20% by weight on the total solids content of the mixture, to a shapable dough obtained by this process, to the preparation of titania extrudates therefrom and to their use as catalyst carriers in hydrocarbon conversion processes, in hydrogenation processes or in hydrocarbon synthesis processes.

Abstract: Process for the preparation of a zeolitic catalyst which comprises treating a zeolite of the Y-type having an alkali oxide/aluminum oxide molar ratio of at most 0.13 with a solution of a multi-valent metal salt having a cationic radius between 0.6 and 1.0 .ANG. and combining the ion-exchanged zeolite without a calcination step with a hydrogenation component of a Group VIII and/or Group VI(b) metal.

Abstract: Method for the regeneration of spent alumina-based catalysts wherein the catalyst firstly is treated with steam at elevated temperature in order to remove at least part of the sulphur; subsequently with an oxygen-containing gas at elevated temperature, in order to burn off carbonaceous matter and finally with a basic medium.