Patent ID: 6068757
Filing Date: 2000-05-30
Classification: C10G

Abstract:
In a process for catalytic hydrodewaxing of a wax-containing feed in a reactor by contacting said feed with hydrogen in the presence of a catalyst comprising a shape-selective zeolite wax-cracking catalyst under hydrodewaxing conditions to produce a dewaxed product stream, the improvement comprising hydrocracking the wax in said feed in at least a first reaction zone containing said wax-cracking catalyst, charging the effluent from said first reaction zone to a second reaction zone containing a hydrotreating catalyst that produces an exothermic reaction and hydrotreating said effluent from said first reaction zone, and charging the effluent from said second reaction zone to at least a third reaction zone containing said wax cracking catalyst and hydrocracking said wax, whereby the effluent from said second reaction zone is heated via the exothermic reaction in said second zone prior to being charged to said third reaction zone so as to increase the average temperature in said third reaction zone by 30-50.degree. F. and wherein said process is conducted in a single stage without any intermediate heating, cooling, or separation steps.