Patent US3617494A successfully refreshed from Google Patents.
US3617494A
Expired / Lapsed
US
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Production of naphtha feedstock from crude oil
Assignee: Phillips Petroleum Co
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Filing: 1970-01-22
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Granted: 1971-11-02
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Expires: 1990-01-22
Abstract
Abstract A process for improved production of aromatics-rich naphtha from crude oils: crude oil is fractionated to produce a virgin naphtha, gas oil is combined with paraffinic raffinate and cracked, and bottoms which is combined with fractionator cycle oil and cracked. Products of cracking are combined and fractionated into cracked naphtha, cycle oil, and decant oil. The naphtha cuts are combined, hydrodesulfurized, reformed, and separated into paraffinic raffinate and the aromatics-rich extract naphtha as product.
Inventors
- 👤 Dean P Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:37
CPC Classifications
C; C10; C10G; C10G61/00; C10G61/02; C10G61/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A process according to claim 1 wherein step (g) is followed by hydrodesulfurization wherein minor amounts of sulfur-containing compounds contained in said combined naphtha stream are substantially removed, and wherein the hydrodesulfurized naphtha stream is substantially debutanized prior to said reforming said (h).
Claim 2
Dependent Claim
65 words
A process according to claim 2 wherein said step (a) said virgin naphtha stream comprises from about C6 to about 350* F., said gas oil stream comprises from about 350* F. to about 600* F., and said bottoms stream comprises from about 600* F. to end point; and wherein in said step (g) said cracked naphtha stream comprises from about C6 to about 375* F.
Claim 3
Dependent Claim
57 words
A process according to claim 3 wherein further is produced in said step (a) at least one light overhead stream consisting essentially of straight run products of about C5 and lighter; and wherein further in said fractionating step (e) is produced a second light overhead stream consisting essentially of products of cracking of about C4 and lighter.
Claim 4
Dependent Claim
37 words
A process according to claim 4 wherein said cracked naphtha stream is substantially depentanized prior to said hydrodesulfurization step, and wherein said products of said reforming step (h) are substantially depentanized prior to said separating step (i).
Claim 5
Dependent Claim
186 words
A proceSs according to claim 5 wherein said catalytic cracking conditions in said step (b) and step (c) are fluid catalytic cracking conditions and include a solid particulate molecular sieve catalyst, a temperature of from about 900* to about 978* F., a pressure of from about 5 to about 25 p.s.i.g., and a catalyst-to-oil ratio of from about 3 to about 12; wherein said hydrodesulfurizer includes conditions of a temperature of from about 550* to about 750* F., a pressure of from about 50 to about 600 p.s.i.g., a hydrogen to hydrocarbon mole ratio of from about 4 to about 10, and using a sulfided cobalt molybdenum on alumina catalyst; wherein said reforming step (h) includes reforming conditions of a temperature of from about 900* to about 980* F., a pressure of from about 400 to about 700 p.s.i.g., and a platinum on alumina catalyst; and wherein said separating step (i) solvent extraction conditions include a temperature of from about 100* to about 350* F., a pressure of from about 2 to about 200 p.s.i.g., and a solvent-to-oil ratio of from about 1 to about 8.
Claim 6
Dependent Claim
43 words
A process according to claim 6 wherein said step (j) is followed by: fractionating said substantially aromatics-containing stream and thereby producing a lower boiling stream consisting essentially of benzene, toluene, and xylene, and a higher boiling stream consisting essentially of C9 aromatic hydrocarbons.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |