PREPARATION OF HIGH QUALITY LUBE BASE STOCK BY SOLVENT EXTRACTION, SORPTION AND CATALYTIC HYDRODEWAXING

摘要

Catalytically dewaxed lubricating base stock oils that have improved resistance to oxidation are produced by pretreating the waxy furfural raffinate with a zeolite sorbent prior to dewaxing with a zeolite catalyst such as ZSM-5, and conducting the dewaxing at a reduced temperature not to exceed about 675 DEG -700 DEG F.