NOBLE METAL HYDROGENATION CATALYSTS AND AROMATIC SATURATION METHODS

摘要

Methods are provided for modifying hydrogenation catalysts having silica supports (or other non-alumina supports) with additional alumina, and using such catalysts to achieve unexpectedly superior hydrogenation of feedstocks. The modified hydrogenation catalysts can have a relatively low cracking activity while providing an increased activity for hydrogenation.

主权项

1. A method for forming a lubricant boiling range product, comprising:
exposing a 600° F.+ (316° C.+) portion of a hydrocracked effluent to a supported catalyst under effective hydrogenation conditions to form a hydrogenated effluent, the supported catalyst comprising 0.1 wt % to 5.0 wt % of a Group VIII noble metal on a silica support, the supported catalyst further comprising 0.3 wt % to 2.5 wt % alumina deposited on the silica support, the supported catalyst having a ratio of aluminum atoms in tetrahedral sites to octahedral sites of at least 1.0; dewaxing the hydrogenated effluent under catalytic dewaxing conditions to form a dewaxed effluent; and hydrofinishing at least a portion of the dewaxed effluent under hydrofinishing conditions to form a hydrofinished effluent comprising a lubricant boiling range product.