US4436614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dewaxing and desulfurizing oils
Assignee: Chevron USA Inc
•
Filing: 1982-10-08
•
Granted: 1984-03-13
•
Expires: 2002-10-08
Abstract
Abstract A desulfurizing and dewaxing process which can be performed in a single reaction vessel is disclosed. The desired lowering of oil partial pressure for dewaxing zone is accomplished by adding diluent gas to the HDS-zone effluent, thus obviating the need for other means to maintain differing oil partial pressures between serial catalyst zones.
Inventors
- 👤 Hazel C. Olbrich
- 👤 Dennis J. O'Rear
- 👤 John A. Zakarian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:26
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G65/043
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A process for treating hydrocarbon containing feeds in a single reaction vessel, comprising: (a) contacting in a desulfurizing reaction zone a hydrocarbonaceous feed boiling from about 35° C. to 650° C. with a desulfurizing catalyst under desulfurizing conditions which comprise a hydrocarbon partial pressure above about 30 psia; (b) mixing the effluent of said desulfurizing reaction zone with a diluent to form an effluent and diluent gas mixture; and (c) contacting said desulfurizing zone effluent and diluent gas mixture with a nonhydrogenating dewaxing catalyst, which comprises an intermediate pore size molecular sieve, under dewaxing conditions, which comprise a hydrocarbon partial pressure in said mixture of less than about 30 psia.
Claim 2
Dependent Claim
110 words
A process for treating hydrocarbon containing feeds in a single reaction vessel, comprising: (a) contacting in a desulfurizing reaction zone a hydrocarbonaceous feed boiling from about 35° C. to 650° C. with a desulfurizing catalyst under desulfurizing conditions which comprise a hydrocarbon partial pressure above about 30 psia; (b) mixing the effluent of said desulfurizing reaction zone with a diluent to form an effluent and diluent gas mixture; and (c) contacting said desulfurizing zone effluent and diluent gas mixture with a nonhydrogenating dewaxing catalyst, which comprises an intermediate pore size molecular sieve, under dewaxing conditions, which comprise a hydrocarbon partial pressure in said mixture of less than about 30 psia.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said feed boils from about 200° C. to 600° C.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said desulfurizing conditions comprise a hydrocarbon partial pressure of 100 psia (6.9 bar) to 600 psia (41.3 bar).
Claim 5
Dependent Claim
26 words
The process of claim 3 wherein the hydrocarbon partial pressure of said desulfurizing step is from about 200 psia (13.8 bar) to 400 psia (27.6 bar).
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said diluent is water.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said dewaxing catalyst comprises a molecular sieve having the ZSM-5 lattice and alumina.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein said molecular sieve is in the hydrogen form.
References Cited (Backward Citations)
US3668113A
Cited
US3700585A
Cited
USRE28398E
Cited
US3894938A
Cited
US4021330A
Cited
US4149960A
Cited
US4171257A
Cited
US4229282A
Cited
US4213847A
Cited
US4257872A
Cited
US4394249A
Cited
US4415436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |