US4149960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas oil processing
Assignee: Mobil Oil AS
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Filing: 1978-03-23
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Granted: 1979-04-17
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Expires: 1998-03-23
Abstract
Abstract An improved processing technique is provided for gas oil pour point reduction and dewaxing. The improved technique comprises contacting an appropriate gas oil feedstock with a catalyst comprising a crystalline aluminosilicate zeolite characterized by a silica/alumina mole ratio of at least 12 and a constraint index, hereinafter defined, within the approximate range of 1 to 12 in the presence of a relatively large amount of co-fed water. The amount of co-fed water is maintained at from about 0.5 to about 15 moles of water/mole of gas oil feedstock.
Inventors
- 👤 William E. Garwood
- 👤 Philip D. Caesar
- 👤 James A. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/16; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J29/65; B01J29/70; C10G2400/00; C10G2400/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
76 words
In a catalytic process for dewaxing petroleum oil feedstock boiling above about 350° F. and containing straight chain and slightly branched chain hydrocarbons, the improvement which comprises contacting said oil feedstock with a catalyst comprising a crystalline aluminosilicate zeolite, characterized by a silica/alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, in the presence of from 0.5 to about 15 moles of water/mole of oil feedstock.
Claim 2
Dependent Claim
76 words
In a catalytic process for dewaxing petroleum oil feedstock boiling above about 350° F. and containing straight chain and slightly branched chain hydrocarbons, the improvement which comprises contacting said oil feedstock with a catalyst comprising a crystalline aluminosilicate zeolite, characterized by a silica/alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, in the presence of from 0.5 to about 15 moles of water/mole of oil feedstock.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-5.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-11.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-12.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite ZSM-35.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-38.
Claim 8
Dependent Claim
76 words
The process of claim 1 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 9
Dependent Claim
76 words
The process of claim 2 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 10
Dependent Claim
76 words
The process of claim 3 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 11
Dependent Claim
76 words
The process of claim 4 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 12
Dependent Claim
76 words
The process of claim 5 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 13
Dependent Claim
76 words
The process of claim 6 wherein said process is conducted at a temperature of from about 450° F. to about 800° F., a pressure of from about 50 psig to about 3000 psig, a liquid hourly space velocity of from about 0.1 hr -1 to about 20 hr -1 , a hydrogen circulation rate of from 0 to about 10,000 scf/bbl, and wherein said mole ratio of water/oil feedstock is from about 0.5 to about 5.
Claim 14
Dependent Claim
22 words
The process of claim 1 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 15
Dependent Claim
22 words
The process of claim 2 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 16
Dependent Claim
22 words
The process of claim 3 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 17
Dependent Claim
22 words
The process of claim 4 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 18
Dependent Claim
22 words
The process of claim 5 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 19
Dependent Claim
22 words
The process of claim 6 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 20
Dependent Claim
22 words
The process of claim 7 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 21
Dependent Claim
22 words
The process of claim 8 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 22
Dependent Claim
22 words
The process of claim 9 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 23
Dependent Claim
22 words
The process of claim 10 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 24
Dependent Claim
22 words
The process of claim 11 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
Claim 25
Dependent Claim
22 words
The process of claim 12 wherein said oil feedstock has a nitrogen content of from about 0.01 to about 3 weight percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |