HYDROTREATING AND DEWAXING PROCESS

摘要

The invention provides a process for hydrotreating and dewaxing a hydrocarbon feedstock, comprising the steps of: (a) hydrotreating the feedstock under hydrotreating conditions in a first reaction zone to obtain a first stage hydrotreated effluent; and (b) introducing at least part of the first stage hydrotreated effluent into a second reaction zone in which the first stage hydrotreated effluent is subjected to a series of alternating dewaxing steps and hydrotreating steps, which dewaxing steps are carried out under catalytically dewaxing conditions and the hydrotreating steps are carried out under hydrotreating conditions, wherein the first step in the series of alternating dewaxing and hydrotreating steps is a dewaxing step and the last step of the series of alternating dewaxing and hydrotreating steps is a hydrotreating step, and the dewaxing steps are carried out with a dewaxing catalyst which comprises a Group VIII metal hydrogenation component, dealuminated aluminosilicate zeolite crystallites and a low acidity refractory oxide binder material which is essentially free of alumina.

主权项

1. A process for hydrotreating and dewaxing a hydrocarbon feedstock boiling in the range of from 170-450° C., comprising the steps of:
(a) hydrotreating the feedstock under hydrotreating conditions in a first reaction zone to obtain a first stage hydrotreated effluent; and (b) introducing at least part of the first stage hydrotreated effluent into a second reaction zone in which the first stage hydrotreated effluent is subjected to a series of alternating dewaxing steps and hydrotreating steps, which dewaxing steps are carried out under catalytically dewaxing conditions and the hydrotreating steps are carried out under hydrotreating conditions, wherein the first step in the series of alternating dewaxing and hydrotreating steps is a dewaxing step and the last step in the series of alternating dewaxing and hydrotreating steps is a hydrotreating step, and the dewaxing steps are carried out with a dewaxing catalyst which comprises a Group VIII metal hydrogenation component, dealuminated aluminosilicate zeolite crystallites and a low acidity refractory oxide binder material which is essentially free of alumina.