Patent US4518575A successfully refreshed from Google Patents.
US4518575A
Expired / Lapsed
US
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Catalytic fibrous carbon
Assignee: Phillips Petroleum Co
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Filing: 1983-12-19
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Granted: 1985-05-21
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Expires: 2003-12-19
Abstract
Abstract The production of microfibrous carbon by the catalytic pyrolysis of carbonaceous materials in the presence of metal containing catalysts is improved by the presence of a small quantity of a phosphorus-containing substance.
Inventors
- 👤 Randall A. Porter
- 👤 Larry E. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:45
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/127; D01F9/1273; D01F9/1275; B; B82; B82Y; B82Y30/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
48 words
A process of producing microfibrous carbon comprising pyrolyzing a carbon containing substance in the presence of a catalyst comprising: (a) an iron Group VIII metal containing substance, selected from iron, cobalt and nickel, (b) a Group IVb metal containing substance, and (c) a Group Va element containing substance.
Claim 2
Dependent Claim
48 words
A process of producing microfibrous carbon comprising pyrolyzing a carbon containing substance in the presence of a catalyst comprising: (a) an iron Group VIII metal containing substance, selected from iron, cobalt and nickel, (b) a Group IVb metal containing substance, and (c) a Group Va element containing substance.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein (a) and (b) are oxides and (c) is selected from substances containing phosphorus or arsenic.
Claim 4
Dependent Claim
9 words
The process of claim 2 wherein (c) is phosphorus.
Claim 5
Dependent Claim
35 words
The process of claims 2 wherein (a) is at least one oxide selected from the oxides of iron, cobalt, and nickel, and (b) is at least one oxide selected from oxides of titanium and zirconium.
Claim 6
Dependent Claim
15 words
The process of claim 3 wherein (a) is nickel oxide, and (b) is titanium oxide.
Claim 7
Dependent Claim
20 words
The process of claim 5 wherein the carbon containing substance is at least one substance selected from alkanes and alkenes.
Claim 8
Dependent Claim
13 words
The process of claim 5 wherein the carbon containing substance is an alkane.
Claim 9
Dependent Claim
12 words
The process of claim 5 wherein the carbon containing substance is butane.
Claim 10
Dependent Claim
68 words
In a process of pyrolyzing carbon containing substances in the presence of a catalyst containing iron group metal selected from iron, cobalt and nickel and group IVb metal to produce microfibrous carbon, the improvement wherein from 0.001 to 20% by weight based on the weight of the total catalyst composition of a Group Va element containing additive is employed to increase the surface area of the carbon product.
Claim 11
Dependent Claim
68 words
In a process of pyrolyzing carbon containing substances in the presence of a catalyst containing iron group metal selected from iron, cobalt and nickel and group IVb metal to produce microfibrous carbon, the improvement wherein from 0.001 to 20% by weight based on the weight of the total catalyst composition of a Group Va element containing additive is employed to increase the surface area of the carbon product.
Claim 12
Dependent Claim
16 words
The process of claim 9 wherein the additive is elemental phosphorus or a compound of phosphorus.
Claim 13
Dependent Claim
27 words
The process of claim 10 wherein the amount of additive employed ranges from 0.01 to 10 weight percent based on the weight of the total catalyst composition.
Claim 14
Dependent Claim
11 words
The process of claim 11 wherein the additive is elemental phosphorus.
Claim 15
Dependent Claim
14 words
The process of claim 9 wherein the catalyst is nickel oxide and titanium oxide.
Claim 16
Dependent Claim
15 words
The process of claim 9 wherein the catalyst contains nickel oxide, titanium oxide, and phosphorous.
Claim 17
Dependent Claim
20 words
The process of claim 9 wherein the carbon containing substance is at least one substance selected from alkanes and alkenes.
Claim 18
Dependent Claim
13 words
The process of claim 9 wherein the carbon containing substance is an alkane.
Claim 19
Dependent Claim
12 words
The process of claim 9 wherein the carbon containing substance is butane.
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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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |