Patent US4347121A successfully refreshed from Google Patents.
US4347121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lubricating oils
Assignee: Chevron USA Inc
•
Filing: 1980-10-09
•
Granted: 1982-08-31
•
Expires: 2000-10-09
Abstract
Abstract A process is provided for preparing stable lubricant oil stocks, comprising hydrocracking a hydrocarbonaceous feed to produce a hydrocrackate having a total nitrogen content of less than about 10 ppm by weight, followed by dewaxing and stabilizing the hydrocrackate.
Inventors
- 👤 Jerome F. Mayer
- 👤 Stephen J. Miller
- 👤 Dennis J. O'Rear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:03
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
A process for preparing stable lubricant oil stocks, comprising: (a) hydrocracking a hydrocarbonaceous feed to produce a hydrocrackate wherein the portion of said hydrocrackate which boils above about 200° C. has a total nitrogen content of less than 10 ppm by weight; (b) stabilizing at least part of said hydrocrackate portion by catalytic hydrofinishing; and (c) dewaxing all or part of the portion of said stabilized hydrocrackate which boils above about 200° C. by contacting said stabilized hydrocrackate fraction with a dewaxing catalyst comprising an intermediate pore size zeolite.
Claim 2
Dependent Claim
89 words
A process for preparing stable lubricant oil stocks, comprising: (a) hydrocracking a hydrocarbonaceous feed to produce a hydrocrackate wherein the portion of said hydrocrackate which boils above about 200° C. has a total nitrogen content of less than 10 ppm by weight; (b) stabilizing at least part of said hydrocrackate portion by catalytic hydrofinishing; and (c) dewaxing all or part of the portion of said stabilized hydrocrackate which boils above about 200° C. by contacting said stabilized hydrocrackate fraction with a dewaxing catalyst comprising an intermediate pore size zeolite.
Claim 3
Dependent Claim
89 words
A process for preparing stable lubricant oil stocks, comprising: (a) hydrocracking a hydrocarbonaceous feed to produce a hydrocrackate wherein the portion of said hydrocrackate which boils above about 200° C. has a total nitrogen content of less than about 10 ppm by weight; (b) dewaxing all or part of said portion of said hydrocrackate which boils above about 200° C. by contacting said hydrocrackate fraction with a dewaxing catalyst comprising an intermediate pore size zeolite; and (c) stabilizing at least part of said dewaxed hydrocrackate portion by catalytic hydrofinishing.
Claim 4
Dependent Claim
89 words
A process for preparing stable lubricant oil stocks, comprising: (a) hydrocracking a hydrocarbonaceous feed to produce a hydrocrackate wherein the portion of said hydrocrackate which boils above about 200° C. has a total nitrogen content of less than about 10 ppm by weight; (b) dewaxing all or part of said portion of said hydrocrackate which boils above about 200° C. by contacting said hydrocrackate fraction with a dewaxing catalyst comprising an intermediate pore size zeolite; and (c) stabilizing at least part of said dewaxed hydrocrackate portion by catalytic hydrofinishing.
Claim 5
Dependent Claim
22 words
A process according to claim 2 wherein said hydrocrackate has a total nitrogen content of less than about 5 ppm by weight.
Claim 6
Dependent Claim
19 words
A process according to claim 3 wherein said total nitrogen content is less than about 1 ppm by weight.
Claim 7
Dependent Claim
18 words
A process according to claim 2 wherein said intermediate pore size zeolite is selected from ZSM-5 and ZSM-11.
Claim 8
Dependent Claim
21 words
A process according to claim 2 wherein said intermediate pore size zeolite has a silica:alumina mol ratio greater than about 200:1.
Claim 9
Dependent Claim
32 words
A process according to claim 5 wherein said dewaxing catalyst further comprises an inorganic oxide matrix substantially free of hydrocracking activity and wherein said dewaxing catalyst is substantially free of hydrogenation components.
Claim 10
Dependent Claim
19 words
A process according to claim 7 wherein said dewaxing occurs at a pressure of less than about 14 bar.
Claim 11
Dependent Claim
39 words
A process according to claim 2 wherein said hydrocrackate portion is separated into at least two fractions wherein each fraction boils over a range of at least about 50° C. and wherein said fractions are dewaxed at different severities.
Claim 12
Dependent Claim
25 words
A process according to claim 9 wherein at least the lower boiling of said fractions boils over a range of less than about 100° C.
Claim 13
Dependent Claim
23 words
A process according to claim 2 or 6 further comprising separating olefins from said dewaxed hydrocrackate portion before stabilizing said dewaxed hydrocrackate portion.
Claim 14
Dependent Claim
30 words
A process according to claim 1 or 2 wherein said dewaxing process is conducted after removing substantially all hydrogen from the portion of said hydrocrackate boiling above about 200° C.
References Cited (Backward Citations)
US3755145A
Cited
US3876522A
Cited
US3962071A
Cited
US4181598A
Cited
US4162962A
Cited
US4171257A
Cited
US4263127A
Cited
US4283271A
Cited
US4283272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |