US3671420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of heavy petroleum oils
Assignee: Texaco Inc
•
Filing: 1970-12-24
•
Granted: 1972-06-20
•
Expires: 1990-12-24
Abstract
Abstract Residue-containing petroleum oils are converted into lighter products by a combination of catalytic hydrocracking and catalytic cracking.
Inventors
- 👤 Raymond F Wilson
- 👤 Reese A Peck
- 👤 Frank E Guptill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:46
CPC Classifications
C; C10; C10G; C10G47/00; C10G67/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
The process of claim 1 in which the overhead is catalytically cracked in one riser of a multiple riser catalytic cracking zone and the bottoms product is cracked in another riser of said multiple riser catalytic cracking zone.
Claim 2
Dependent Claim
24 words
The process of claim 2 in which a virgin gas oil is also introduced into said one riser and catalytically cracked with said overhead.
Claim 3
Dependent Claim
45 words
The process of claim 3 in which the product of the catalytic cracking of said overhead and said virgin gas oil is separated into a naphtha fraction and a fraction boiling above the naphtha range and the latter is catalytically cracked with said bottoms product.
Claim 4
Dependent Claim
44 words
The process of claim 3 in which naphtha and kerosene fractions are recovered from the catalytic cracking product of said virgin gas oil and said overhead and that portion of the product boiling above the kerosene range is catalytically cracked with said bottoms product.
Claim 5
Dependent Claim
38 words
The process of claim 2 in which the bottoms product after being at least partially catalytically cracked in said riser, is withdrawn therefrom and subjected to additional cracking in the dense phase of a fluidized cracking catalyst bed.
Claim 6
Dependent Claim
36 words
The process of claim 2 in which said one riser is operated at a temperature between about 800* and 1,000* F. and said other riser is operated at a temperature between about 850* and 1,100* F.
Claim 7
Dependent Claim
23 words
The process of claim 2 in which the catalyst in each of said risers contains between about 0.5 and 4.0 weight percent carbon.
Claim 8
Dependent Claim
20 words
The process of claim 1 in which the residue-containing petroleum fraction has an initial boiling point of about 850* F.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |