US3928175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upgrading crude oil by combination processing
Assignee: Mobil Oil AS
•
Filing: 1974-08-14
•
Granted: 1975-12-23
•
Expires: 1994-08-14
Abstract
Abstract The combination processing concept described involves using a low severity reforming operation primarily as a source of hydrogen for CHD processing and other treating operations in the production of low octane reformate (90-95 R+O) which is then upgraded by cracking over a crystalline aluminosilicate catalyst to produce a higher octane gasoline boiling product. Alkylation of reformer and FCC light ends contributes to gasoline boiling product yields.
Inventors
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C10G; C10G11/00; C10G11/14; C10G11/18; C10G69/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
IN A COMBINATION PROCESS FOR UPGRADING CRUDE OILS BY CATALYTIC CRACKING, REFORMING, DESULFURIZATION AND ALKYLATION, THE IMPROVEMENT WHICH COMPRISES, SEPARATING A CRUDE OIL TO RECOVER GAS OILS, LIGHT AND HEAVY NAPHTHA BOILING HYDROCARBONS AND A DISTILLATE FRACTION BOILING IN THE RANGE OF ABOUT 400*F. TO ABOUT 650*F. PRETREATING THE HEAVY NAPHTHA FRACTION TO REMOVE SULFUR AND NITROGEN, REFORMING THE PRETREATED HEAVY NAPHTHA UNDER CONDITIONS PRIMARILY RESTRICTED TO DEHYDROGENATION OF NAPHTHENES THEREBY FORMING A HYDROGEN RICH GAS STREAM, A C4 HYDROCARBON RICH STREAM AND A LOW OCTANE LIQUID REFORMATE STREAM, CATALYTICALLY CRACKING SAID LOW OCTANE LIQUID REFORMATE IN A FIRST RISER CONVERSION ZONE IN THE PRESENCE OF A CRYSTALLINE ZEOLITE CONVERSION CATALYST AT AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. AND A HYDROCARBON RESIDENCE TIME WITHIN THE RANGE OF 1 TO 8 SECOND,
Claim 2
Dependent Claim
132 words
IN A COMBINATION PROCESS FOR UPGRADING CRUDE OILS BY CATALYTIC CRACKING, REFORMING, DESULFURIZATION AND ALKYLATION, THE IMPROVEMENT WHICH COMPRISES, SEPARATING A CRUDE OIL TO RECOVER GAS OILS, LIGHT AND HEAVY NAPHTHA BOILING HYDROCARBONS AND A DISTILLATE FRACTION BOILING IN THE RANGE OF ABOUT 400*F. TO ABOUT 650*F. PRETREATING THE HEAVY NAPHTHA FRACTION TO REMOVE SULFUR AND NITROGEN, REFORMING THE PRETREATED HEAVY NAPHTHA UNDER CONDITIONS PRIMARILY RESTRICTED TO DEHYDROGENATION OF NAPHTHENES THEREBY FORMING A HYDROGEN RICH GAS STREAM, A C4 HYDROCARBON RICH STREAM AND A LOW OCTANE LIQUID REFORMATE STREAM, CATALYTICALLY CRACKING SAID LOW OCTANE LIQUID REFORMATE IN A FIRST RISER CONVERSION ZONE IN THE PRESENCE OF A CRYSTALLINE ZEOLITE CONVERSION CATALYST AT AN ELEVATED TEMPERATURE OF AT LEAST 1000*F. AND A HYDROCARBON RESIDENCE TIME WITHIN THE RANGE OF 1 TO 8 SECOND,
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein light naphtha separated from the crude is combined with the gas oil passed to the second conversion zone.
Claim 4
Dependent Claim
50 words
The process of claim 1 wherein the light naphtha separated from the crude oil is initially combined with hot catalyst in a bottom portion of the second riser conversion zone to form a suspension and gas oil is added to the suspension in a downstream portion of the conversion zone.
Claim 5
Dependent Claim
43 words
The process of claim 1 wherein a heavy gasoline product fraction of catalytic cracking is recovered from a lower boiling gasoline fraction and the heavy gasoline product fraction is recracked in said first conversion zone in admixture with said low octane liquid reformate.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the crystalline zeolite cracking catalyst comprises ZSM-5.
Claim 7
Dependent Claim
39 words
The process of claim 5 wherein catalyst is recovered from each of said conversion zones as a dense fluid bed of catalyst and C5 and C6 hydrocarbons comprising the light virgin naphtha are converted with the ZSM-5 catalyst component.
Claim 8
Dependent Claim
29 words
The process of claim 1 wherein hydrogen rich gas product of reforming is employed to desulfurize the naphtha feed passed to reforming and in desulfurization of said distillate fraction.
Claim 9
Dependent Claim
28 words
The process of claim 1 wherein hydrogen rich product gas of the reforming operation is passed sequentially through the naptha pretreating step and then the distillate desulfurization step.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |