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Patent US4046670A successfully refreshed from Google Patents.
US4046670A
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US
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Method for the treatment of heavy petroleum oil
Assignee: Kureha Corp
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Filing: 1976-08-11
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Granted: 1977-09-06
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Expires: 1996-08-11
Abstract
Abstract In the thermal cracking of heavy petroleum oil (having an API specific gravity of not more than 25) in a tubular type heating furnace, a specific inorganic substance is added in a specific proportion to the heavy petroleum oil to prevent the heavy oil from undergoing coking inside the furnace.
Inventors
- 👤 Koji Seguchi
- 👤 Minoru Sugita
- 👤 Kazuyoshi Inada
- 👤 Kiyoshi Tagaya
- 👤 Yuji Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:05
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
In a process for the thermal cracking of a heavy petroleum oil having an API specific gravity of not more than 25, within a tubular type heating furnace at a temperature of not less than 400° C., the improvement comprising: mixing the heavy petroleum oil feed to the furnace with 0.5 to 5% by weight of an inorganic substance having a surface area of not less than 30m 2 /g and an average particle diameter of not more than 30 microns, said inorganic material containing, as principal components, a high melting oxide and an iron oxide, said inorganic material being obtained by alkali treatment of a member selected from the group consisting of Laterite, Garnierite, Magnesite, Fly ash and Kyoto yellow ochre and mixtures thereof.
Claim 2
Dependent Claim
125 words
In a process for the thermal cracking of a heavy petroleum oil having an API specific gravity of not more than 25, within a tubular type heating furnace at a temperature of not less than 400° C., the improvement comprising: mixing the heavy petroleum oil feed to the furnace with 0.5 to 5% by weight of an inorganic substance having a surface area of not less than 30m 2 /g and an average particle diameter of not more than 30 microns, said inorganic material containing, as principal components, a high melting oxide and an iron oxide, said inorganic material being obtained by alkali treatment of a member selected from the group consisting of Laterite, Garnierite, Magnesite, Fly ash and Kyoto yellow ochre and mixtures thereof.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said surface area is from 30 to 200m 2 /g.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the cracking temperature is within the range of from 400° to 500° C.
References Cited (Backward Citations)
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |