Patent ID: 6340430
Filing Date: 2002-01-22
Classification: C10G

Abstract:
A hydrotreating process which comprises:a.) separating a distillate hydrocarbon fraction in a vapor/liquid separation zone in the presence of added hydrogen into a first vapor phase process stream comprising hydrocarbons boiling in the light diesel and kerosene boiling point ranges and a first liquid phase process stream comprising hydrocarbons boiling in the heavy diesel boiling point range; b.) admixing hydrogen with the first liquid phase process stream to yield a second liquid phase process stream and then passing the second liquid phase process stream into a catalytic dewaxing zone operated at catalytic hydrodewaxing conditions and thereby producing a catalytic dewaxing zone effluent stream; c.) admixing the first vapor phase process stream and the catalytic dewaxing zone effluent stream and producing a charge mixture having a lower temperature than the catalytic dewaxing zone effluent stream; and, d.) passing said charge mixture into an aromatic hydrocarbon saturation zone operated at hydrogenation conditions which include a lower temperature than said catalytic hydrodewaxing conditions, and recovering a distillate product stream having a lower pour point and reduced aromatics content than said distillate hydrocarbon fraction.