HYDROTREATING AND DEWAXING PROCESS Russian patent published in 2018 - IPC C10G45/00 C10G47/00 C10G49/22 C10G65/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for hydrotreating and dewaxing a hydrocarbon feedstock boiling in the range of 170-450°C, comprising steps of: (a) hydrotreating hydrocarbon feedstock, at least 90 wt% of which boils in a gas oil boiling range from 170 to 450°C under hydrotreating conditions in a first reaction zone to produce 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 three or more alternating dewaxing steps and hydrotreating steps, wherein dewaxing steps are carried out under catalytically dewaxing conditions and the hydrotreating steps are carried out under hydrotreating conditions, wherein the first step from said three or more alternating dewaxing and hydrotreating steps is a dewaxing step, and the last step of said three or more 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.

EFFECT: present invention improves temperature control at reaction steps, while at the same time, requiring less dewaxing catalyst.

15 cl, 5 tbl, 2 ex