US4601816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upgrading heavy hydrocarbon oils using sodium hypochlorite
Assignee: Mobil Oil AS
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Filing: 1984-08-09
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Granted: 1986-07-22
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Expires: 2004-08-09
Abstract
Abstract Hydrocarbon oils, particularly petroleum residua, are demetallized by contacting the oil first with an aqueous solution of a hypochlorite such as sodium hypochlorite or calcium hypochlorite and subsequently subjecting at least the oil fraction thereof to a solvent deasphalting step.
Inventors
- 👤 Lillian A. Rankel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
C; C10; C10G; C10G53/00; C10G53/02; C10G53/04; C10G53/06; C10G29/00; C10G29/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
A process for demetallizing a residual hydrocarbon fraction comprising: (a) contacting said hydrocarbon fraction with an aqueous solution of a hypochlorite salt; (b) separating the mixture into an aqueous phase and an oil phase; (c) contacting the oil phase with a deasphalting solvent and (d) obtaining by separation a product comprising a demetallized oil fraction suitable for use as a feedstock for catalytic processing.
Claim 2
Dependent Claim
64 words
A process for demetallizing a residual hydrocarbon fraction comprising: (a) contacting said hydrocarbon fraction with an aqueous solution of a hypochlorite salt; (b) separating the mixture into an aqueous phase and an oil phase; (c) contacting the oil phase with a deasphalting solvent and (d) obtaining by separation a product comprising a demetallized oil fraction suitable for use as a feedstock for catalytic processing.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the volume ratio of an aqueous 5% hypochlorite solution to oil is between 70 to 140 cc of said solution to 100 g oil.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the hypochlorite is selected from the group consisting of calcium hypochlorite and sodium hypochlorite.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the concentration of hypochlorite salt in said aqueous solution is between about 1 and about 50% by weight.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein said contacting of said hypochlorite solution with hydrocarbon oil is conducted at a temperature between about 30° F. and about 200° F.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein the deasphalting solvent is selected from the group consisting of C 2 to C 15 hydrocarbons.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the weight ratio of deasphalting solvent to oil phase is between 0.5:1 and about 15:1.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the solvent deasphalting operation is carried out at a temperature between about 30° F. and about 500° F.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the deasphalting operation is carried out at a pressure between about atmospheric and about 1000 psig.
Claim 11
Dependent Claim
28 words
The process of claim 1 wherein the ratio of available oxygen to hydrocarbon oil in the resultant mixture of (a) is at least 1 wt.% oxygen/100 g oil.
Claim 12
Dependent Claim
17 words
The process of claim 1 wherein the hypochlorite salt is a salt of a group IA metal.
Claim 13
Dependent Claim
22 words
The process of claim 1 wherein the Group IA metal is selected from the group consisting of lithium, sodium, potassium and rubidium.
Claim 14
Dependent Claim
17 words
The process of claim 1 wherein the hypochlorite salt is a salt of a Group IIA metal.
Claim 15
Dependent Claim
20 words
The process of claim 13 wherein the metal is selected from the group consisting of magnesium, calcium, strontium, and barium.
Claim 16
Dependent Claim
14 words
The process of claim 1 wherein the hypochlorite salt is substituted by hypochlorous acid.
Claim 17
Dependent Claim
31 words
The process of claim 1 wherein a gel of a metal selected from the group consisting of nickel, cobalt, copper, iron, manganese and mercury is also added to said aqueous solution.
Claim 18
Dependent Claim
32 words
The process of claim 1 wherein a hypochlorite decomposition accelerator selected from the group consisting of ammonium salts of carbonic oxalic, nitric, acetic or phosphoric acid is added to said aqueous solution.
Claim 19
Dependent Claim
14 words
The process of claim 1 wherein hydrogen peroxide is added to said aqueous solution.
Claim 20
Dependent Claim
27 words
The process of claim 1, wherein said contacting of said hydrocarbon fraction with said hypochlorite salt is for a time of from about 1 to 24 hours.
Claim 21
Dependent Claim
26 words
The process of claim 1, wherein said contacting of said oil phase with said deasphalting solvent is for a time of from 0.1 to 1.5 hours.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |