Patent US4116820A successfully refreshed from Google Patents.
US4116820A
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Process for demetallizing of heavy hydrocarbons
Assignee: Shell USA Inc
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Filing: 1977-06-29
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Granted: 1978-09-26
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Expires: 1997-06-29
Abstract
Abstract A process is disclosed for demetallizing heavy hydrocarbon oils, by contacting the oil at elevated temperature with acidified active carbon. The process is particularly useful as a pretreatment of the heavy hydrocarbons for subsequent catalytic processes which are impared by metals such as nickel and vanadium.
Inventors
- 👤 George C. Blytas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:50
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A process for demetallizing heavy hydrocarbon tocks which comprises contacting said stocks at a temperature in the range from about 370° to 450° C. with a sorbent consisting essentially of particulate active carbon having at least a majority of its pore volume in pores having a diameter greater than 0.9 nm, which sorbent has previously been oxidized by contact with a highly acidic oxidizing fluid and substantially separated from said oxidizing fluid.
Claim 2
Dependent Claim
72 words
A process for demetallizing heavy hydrocarbon tocks which comprises contacting said stocks at a temperature in the range from about 370° to 450° C. with a sorbent consisting essentially of particulate active carbon having at least a majority of its pore volume in pores having a diameter greater than 0.9 nm, which sorbent has previously been oxidized by contact with a highly acidic oxidizing fluid and substantially separated from said oxidizing fluid.
Claim 3
Dependent Claim
31 words
A process as in claim 1 wherein the sorbent has a majority of its pore volume in pores having a diameter in the range from about 1 to about 10 nm.
Claim 4
Dependent Claim
17 words
A process as in claim 1 wherein the temperature is from about 390° to about 440° C.
Claim 5
Dependent Claim
25 words
A process as in claim 1 wherein the heavy hydrocarbon is a petroleum distillate boiling in the range from about 340° to about 510° C.
Claim 6
Dependent Claim
15 words
A process as in claim 1 wherein the heavy hydrocarbon is a residual mineral oil.
Claim 7
Dependent Claim
15 words
A process as in claim 1 wherein the heavy hydrocarbon is a petroleum long residue.
References Cited (Backward Citations)
US4048061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |