Lube basestock with excellent low temperature properties and a method for making
AssigneeExxonMobil Research and Engineering Company
InventorsWilliam John Murphy, Ian Alfred Cody, Bernard George Silbernagel
Life of this patent
Estimating the term…
Abstract
A method for producing a lube basestock from a waxy feed is disclosed in which a feed containing to 50 wt % or more of wax is hydrotreated and stripped to lower the nitrogen and sulfur content of the feed. The feed is then hydroisomerized under conditions to 370° C. hydrocatalytically dewaxed with a catalyst comprising a mixture of a catalytically active metal on a zeolite dewaxing catalyst and an amorphous catalyst, or alternatively is solvent dewaxed and then hydrocatalytically dewaxed with the just described catalyst.
Claims10
A method for producing a lube basestock from a feed containing 50 wt % or more of wax comprising:
- (a) hydrotreating the feed under hydrotreating conditions so as to reduce the sulfur and nitrogen content thereof;
- (b) hydroisomerizing the hydrotreated feed under hydroisomerization conditions to reduce the wax content in the feed to less than about 40 wt %;
- (c) separating the hydroisomerizated feed of step (b) to obtain a lube fraction boiling above about 340° C.;
- (d) processing the lube fraction of step (c) under hydrocatalytic dewaxing conditions with a catalyst comprising at least one active metal hydrogenation component on a dewaxing catalyst and at least one active metal hydrogenation component on an amorphous hydroisomerization catalyst.
A method for producing a lube basestock from a feed containing 50 wt % or more of wax comprising:
- (a) hydrotreating waxy feed under hydrotreating conditions sufficient to reduce the sulfur and nitrogen content thereof to produce a hydro-treated feed;
- (b) hydroisomerizing the hydrotreated feed under hydroisomerization conditions sufficient to reduce the wax content in the feed to about 35 wt % or less;
- (c) separating the hydroisomerized feed of step (b) to obtain a lube fraction boiling above about 340° C.;
- (d) solvent dewaxing the lube fraction to a pour point of from about +10° C. to about −20° C. to obtain a dewaxed feed;
- (e) processing the dewaxed feed under hydrocatalytic dewaxing conditions with a unitized powder pellet catalyst comprising at least one active metal component on a 10 member ring unidirectional pore inorganic oxide molecular sieve and at least one active metal component on an isomerization component selected from refractory metal oxides and refractory metal oxides including a dopant.
A lube basestock comprising at least about 75 wt % of isoparaffins having a Free Carbon Index less than about 10 and in which at least 75% of the aliphatic chains of the isoparafins are methyl groups.
Dependencies are inferred from the claim text.