Abstract: A process for catalytic hydrodewaxing of a wax-containing feed wherein the feed is subjected to hydrodewaxing conditions in a first reaction zone containing a wax-cracking catalyst, the effluent from the first reaction zone is charged to a second reaction zone containing a hydrotreating catalyst that produces an exothermic reaction and the effluent from the second reaction zone is charged to a third reaction zone containing a wax-cracking catalyst, the exothermic reaction in the second reaction zone effecting heating of the effluent, which is charged to the third reaction zone.

Abstract: A process for hydrodewaxing a petroleum or shale oil fraction, e.g., petroleum distillate, over a shape selective zeolite in the presence of hydrogen wherein the dewaxing is conducted in at least two stages, with some of the hydrogen added to first stage effluent. Dewaxed feed, and a high octane gasoline byproduct are obtained as products.

Abstract: A process for hydrodewaxing a petroleum or shale oil fraction, e.g., petroleum distillate, over a shape selective zeolite in the presence of hydrogen wherein the dewaxing is conducted in at least two stages, with some reheating of first effluent. Dewaxed feed, and a high octane gasoline byproduct are obtained as products.