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Process for preparing lube basestocks having superior low temperature properties at high VI

  • US 20090166252A1
  • Filed: 12/16/2008
  • Published: 07/02/2009
  • Est. Priority Date: 12/28/2007
  • Status: Active Grant
First Claim
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1. A two stage process for dewaxing a waxy lube feedstock which comprises:

  • (a) contacting a feedstock in a first dewaxing stage with at least one 1D, 10-ring molecular sieve containing catalyst having a refined constraint index of 2.0 or less under first hydroisomerizing dewaxing conditions to produce a first dewaxed product stream; and

    (b) contacting said first dewaxed product stream in a second dewaxing stage with at least one 1D, 10-ring molecular sieve containing catalyst having a refined constraint index of greater than 2.0 under second hydroisomerizing dewaxing conditions to produce a dewaxed product.

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