BASE STOCK PRODUCTION USING A HIGH ACTIVITY CATALYST

摘要

Methods are provided for using a dewaxing catalyst formed using at least two structure directing agents for production of a lubricant base stock. For example, ZSM-48 crystals formed using multiple directing agents (and/or formulated catalysts made using such crystals) can have an increased activity and/or can provide an improved yield during catalytic production of lubricant base stocks. Additionally or alternately, ZSM-48 crystals formed using multiple directing agents (and/or formulated catalysts made using such crystals) can provide improved aromatic saturation during processing of a feed for lubricant base stock production.

主权项

1. A method for processing a feed using a catalyst formed using a dominant structure directing agent and a secondary structure directing agent, comprising:
exposing a feedstock having a T5 boiling point of at least 400° F. (204° C.) to a catalyst comprising ZSM-48 crystals under effective dewaxing conditions to form a dewaxed effluent, at least a portion of the ZSM-48 crystals being crystallized from reaction mixture including a dominant structure directing agent cation and a secondary structure directing agent cation, an amount of secondary structure directing agent cation in the reaction mixture being at least 20 mole % of a combined amount of dominant structure directing agent cation and secondary structure directing agent cation in the reaction mixture, the ZSM-48 crystals having a molar ratio of SiO2 to Al2O3 of 65 to 120.