US 6,187,725 B1Granted

Process for making an automatic transmission fluid composition

AssigneeChevron U.S.A. Inc.

InventorsDavid C. Kramer, John A. Zakarian, Jay M. Peterson, Russell R. Krug, Jaime Lopez, Stephen K. Lee, Mark L. Sztenderowicz, Joseph M. Pudlak

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Abstract

The invention includes a process of making a lubricating composition including: contacting a heavy mineral oil feed in a hydrocracking zone with a hydrocracking catalyst at hydrocracking conditions, whereby at least a portion of the heavy mineral oil feed is cracked; recovering at least one gasoline-range fraction and one bottoms fraction from the hydrocracking zone; passing a first portion of the bottoms fraction including not more than about 67 wt. % of the bottoms fraction to a dewaxing zone; and passing a second portion of the bottoms fraction including at least about 33 wt. % of the bottoms fraction back to the fuels hydrocracker for additional processing; and where the bottoms fraction has a viscosity at 100° C. of less than about 4.0; contacting the first portion of the bottoms fraction with a dewaxing catalyst under catalytic dewaxing conditions, where at least a portion thereof is substantially dewaxed; contacting at least a portion of the substantially dewaxed bottoms fraction with a hydrofinishing catalyst under hydrofinishing conditions, thereby producing a hydrofinished, dewaxed bottoms fraction; and removing from the hydrofinished, dewaxed bottoms fraction at least one light fraction including diesel or jet fuel range material, thereby leaving a heavy fraction including the lubricating composition having a naphthenes content of at least about 33 wt. %.

Claims26

Dependent claims

A lubricating composition prepared by the process comprising the steps of:

(a) contacting a heavy mineral oil feed in a hydrocracking zone with a hydrocracking catalyst at hydrocracking conditions, whereby at least a portion of said heavy mineral oil feed is cracked;
(b) recovering at least one gasoline-image fraction and one bottoms fraction from said hydrocracking zone;
(c) passing a first portion of said bottoms fraction comprising not more than about 67 wt. % of said bottoms fraction to a dewaxing zone;
and passing a second portion of said bottoms fraction comprising at least about 33 wt. % of said bottoms faction back to said feed hydrocracker for additional processing;
and wherein said bottoms fraction has a viscosity at 100° C. of less than about 4.0 cSt;
(d) contacting said first portion of said bottoms fraction with a dewaxing catalyst under catalytic dewaxing conditions, wherein at least a portion thereof is substantially dewaxed;
(e) contacting at least a portion of said substantially dewaxed bottoms fraction with a hydrofinishing catalyst under hydrofinishing conditions, thereby producing a hydrofinished, dewaxed bottoms fraction;
(f) removing from said hydrofinished, dewaxed bottoms fraction at least one light fraction comprising diesel or jet fuel range material, thereby leaving a heavy fraction comprising a hydrocracker-derived, highly naphthenic, low viscosity index mineral oil having a naphthenes content of at least about 33 wt. %;
and
(g) mixing with said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil:
(1) a second mineral-oil selected from a high viscosity index mineral oil, a convention low viscosity index mineral oil, or mixtures thereof;
(2) at least one polymethacrylate polymer;
and
(3) at least one performance additive package,
thereby forming said lubricating composition wherein said lubricating composition comprises:
(a) from about 10 wt. % to about 100 wt. % of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil, based on the -combined weight of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil and said second mineral oil;
(b) from about 0 wt. % to about 90 wt. % of said second mineral oil, based on the combined weight of said hydrocracker-derived highly naphthenic, low viscosity index mineral oil and said second mineral oil;
(c) from about 2 wt. % to about 14 wt. % of said polymethacrylate polymer, based on the total weight of said lubricating composition and
(d) from about 2 wt. % to about 14 wt. % of said performance additive package, based on the total weight of said lubricating composition.

16 more elements

A process of toad a lubricating composition comprising:

(a) contacting a heavy mineral oil feed in a hydrocracking zone with a hydrocracking catalyst at hydrocracking conditions, whereby at least a portion of said heavy mineral oil feed is cracked;
(b) recovering at least one gasoline-range fraction and one bottoms fraction from said hydrocracking zone;
(c) passing a first portion of said bottoms fraction comprising not more than about 67 wt. % of sad bottoms fraction to a dewaxing zone;
and passing a second portion of said bottoms fraction comprising at least about 33 wt. % of said bottoms fraction back to said feed hydrocracker for additional processing;
and wherein sad bottoms fraction has a viscosity at 100° C. of less than about 4.0 cSt;
(d) contacting said first portion of said bottoms fraction with a dewaxing catalyst under catalytic dewaxing conditions, wherein at least a portion thereof is substantially dewaxed;
(e) contacting at least a portion of sad substantially dewaxed bottoms fraction with a hydrofinishing catalyst under hydrofinishing conditions, thereby producing a hydrofinished, dewaxed bottoms fraction;
(f) removing from said hydrofinished, dewaxed bottoms fraction at least one light fraction comprising diesel or jet fuel range material, thereby leaving a heavy fraction comprising a hydrocracker-derived, highly naphthenic low viscosity index mineral oil;
and
(g) mixing with said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil:
(1) a second mineral oil selected from a high viscosity index mineral oil, a conventional low viscosity index mineral oil or mixtures thereof;
(2) at least one polymethacrylate polymer;
and
(3) at least one performance additive package,
thereby forming said lubricating composition wherein said lubricating composition has a naphthenes content of at least about 33 wt. % and comprises:
(a) from about 10 wt. % to about 100 wt. % of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil, based on the combined weight of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil and said second mineral oil;
(b) from about 0 wt. % to about 90 wt. % of said second mineral oil based on the combined weight of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil and said second mineral oil;
(c) from about 2 wt. % to about 14 wt. % of said polymethacrylate polymer, based on the total weight of said lubricating composition;
and
(d) from about 2 wt. % to about 14 wt. % of said performance additive package, based on the total weight of said lubricating composition.

17 more elements

A process of making an automatic transmission fluid composition comprising:

(a) contacting a heavy mineral oil feed in a hydrocracking zone with a hydrocracking catalyst at hydrocracking conditions, whereby at least a portion of said heavy mineral oil feed is cracked;
(b) recovering at least one gasoline-range fraction and one bottoms fraction from said hydrocracking zone;
(c) passing a first portion of said bottoms fraction comprising not more than about 67 wt. % of said bottoms fraction to a dewaxing zone;
and passing a second portion of said bottoms fiction comprising at least about 33 wt. % of said bottoms faction back to said feed hydrocracker for additional processing;
and wherein said bottoms fraction has a viscosity at 100° C. of less than about 4.0 cSt;
(d) contacting said first portion of said bottoms fraction with a dewaxing catalyst under catalytic dewaxing conditions, wherein at least a portion thereof is substantially dewaxed;
(e) contacting at least a portion of said substantially dewaxed bottoms fraction with a hydrofinishing catalyst under hydrofinishing conditions, thereby producing a hydrofinished, dewaxed bottoms fraction;
(f) removing from said hydrofinished, dewaxed bottoms fraction at least one light fraction comprising diesel or jet fuel range material, thereby leaving a heavy fraction comprising a hydrocracker-derived, highly naphthenic, low viscosity index mineral oil having a naphthenes content of at least about 33 wt. %;
and
(g) mixing with said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil:
(1) a second mineral oil selected from a high viscosity index mineral oil, a conventional low viscosity index mineral oil, and mixtures thereof;
(2) at least one polymethacrylate polymer;
ad
(3) at least one performance additive package,
thereby forming said automatic transmission fluid composition, wherein said automatic transmission fluid composition comprises:
(a) from about 10 wt. % to about 100 wt. % of said hydrocracker-derived, highly naphthenic, low viscosity index mineral oil, based on the combined weight of said hydrocracker-derived, highly naphthenic, low index mineral oil and said second mineral oil;
(b) from about 0 wt. % to about 90 wt. % of said second mineral oil, based on the combined weight of said hydrocracker-derived highly naphthenic, low viscosity index mineral oil and said second mineral oil;
(c) from about 2 wt. % to about 14 wt. % of said polymethacrylate polymer, based on the total weight of said automatic transmission fluid composition;
and
(d) from about 2 wt % to about 14 wt. % of said performance additive package, based on the total weight of said automatic transmission fluid composition.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/173,399Filed 15 Oct 1998
Granted: 13 Feb 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

C10M 169/04
Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials,…:…
C10G 65/12
Plural serial stages only: including cracking steps and other hydrotreatment steps
C10M 101/02
Lubricating compositions characterised by the base-material being a mineral or fatty oil: petroleum fractions
C10M 177/00
Special methods of preparation of lubricating compositions