초록 ▼

I disclose a single stage, multilayered catalyst system capable of hydrodehazing and hydrofinishing a solvent dewaxed lube oil base stock. In the first layer, I catalytically dewax the solvent dewaxed stock. In the second layer, I hydrofinish the catalytically dewaxed stock. My invention also relate

I disclose a single stage, multilayered catalyst system capable of hydrodehazing and hydrofinishing a solvent dewaxed lube oil base stock. In the first layer, I catalytically dewax the solvent dewaxed stock. In the second layer, I hydrofinish the catalytically dewaxed stock. My invention also relates to a process for hydrodewaxing and hydrofinishing a solvent dewaxed lube oil base stock.

대표청구항 ▼

A process for dehazing and hydrofinishing a hydrocracked, solvent dewaxed lube oil base stock which comprises: passing said stock, in the presence of hydrogen, through a multilayer single stage catalyst system wherein said feed is hydrodehazed and hydrofinished, said catalyst system comprising: (a)

A process for dehazing and hydrofinishing a hydrocracked, solvent dewaxed lube oil base stock which comprises: passing said stock, in the presence of hydrogen, through a multilayer single stage catalyst system wherein said feed is hydrodehazed and hydrofinished, said catalyst system comprising: (a) a first catalyst layer comprising a fixed bed of catalyst particles having dehazing activity, said catalyst comprising a silica aluminophosphate (SAPO) molecular sieve having a pore probe selectivity greater than 4 wherein said pore probe selectivity is the ratio of the weight of normal hexane to combine weight of 3-methylpentane and 2,2-dimethylbutane in the molecular sieve pore system per gram of catalyst; and (b) a second catalyst layer in contact with said first catalyst layer comprising a fixed bed of catalyst particles having hydrogenation activity under hydrofinishing conditions, under hydrodehazing and hydrofinishing conditions, and obtaining a product having a nephelometric turbidity units (NTU) index of 24 or less wherein said nephelometric turbidity units (NTU) index is a measure of wax remaining in the oil after solvent dewaxing.