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US3872136A
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Process for the preparation of vanadium oxycarbide, oxynitride and oxycarbonitride
Assignee: HOLLANDSE METALLURGISCHE INDUSTRIE BILLITON NV
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Filing: 1970-09-09
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Granted: 1975-03-18
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Expires: 1990-09-09
Abstract
Abstract A process for the preparation of a material, consisting of at least one vanadium compound having the formula VCxNy wherein x and y have any desired ratio to one another and x or y may equal zero, except that when y is 0, x cannot be 0, and vice versa, by reacting at a high temperature a solid material consisting chiefly of vanadium oxycarbide and gas comprising 0-100 vol. % hydrogen, 0-100 vol. % nitrogen, and 0-100 vol. % ammonia, the sum of the hydrogen, nitrogen and ammonia contents constituting at least 50 vol. % of the gas. The product has utility as an alloying agent for the addition of vanadium and optionally, nitrogen, to molten steel.
Inventors
- 👤 Servaas Middelhoek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:07
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
174 words
PROCESS FOR THE PREPARATION OF A MATERIAL CONSISTING MAINLY OF AT LEAST ONE VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF VANADIUM OXY CARBIDE, VANADIUM OXY NITRIDE AND VANADIUM OXY CARBONITRIDE, THE OXYGEN CONTENT RANGING FROM ABOUT 0.2 TO 1.7 PERCENT WT. HAVING THE FORMULA: VCZNYO, WHEREIN X AND Y ARE IN ANY DESIRED RATIO AND EITHER MAY BE ZERO, EXCEPT THAT WHEN X IS O, Y CANNOT BE ZERO AND CONVERSELY, COMPRISING REACTING AT A TEMPERATURE RANGING FROM ABOUT 800*C TO 1,250*C A SOLID COMPOUND DEFINED BY THE FORMULA VOPCQNZ, HAVING AN OXYGEN CONTENT IN THE RANGE OF ABOUT 7.3 TO 14.9 PERCENT BY WT., WHEREIN P AND Q MAY HAVE ANY RATIO TO ONE ANOTHER AND Z CAN RANGE FROM 0 TO 3 PERCENT BY WT., WITH A GAS COMPRISING FROM 0 TO 100 VOLUME PRE CENT OF HYDROGEN, 0 TO 100 VOLUME PERCENT OF NITROGEN, 0 TO 100 VOLUME PER CENT AMMONIA, THE SUM OF THE HYDROGEN, NITROGEN AND AMMONIA CONTENTS CONSTITUTING AT LEAST 50 VOLUME PER CENT OF SAID GAS.
Claim 2
Dependent Claim
174 words
PROCESS FOR THE PREPARATION OF A MATERIAL CONSISTING MAINLY OF AT LEAST ONE VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF VANADIUM OXY CARBIDE, VANADIUM OXY NITRIDE AND VANADIUM OXY CARBONITRIDE, THE OXYGEN CONTENT RANGING FROM ABOUT 0.2 TO 1.7 PERCENT WT. HAVING THE FORMULA: VCZNYO, WHEREIN X AND Y ARE IN ANY DESIRED RATIO AND EITHER MAY BE ZERO, EXCEPT THAT WHEN X IS O, Y CANNOT BE ZERO AND CONVERSELY, COMPRISING REACTING AT A TEMPERATURE RANGING FROM ABOUT 800*C TO 1,250*C A SOLID COMPOUND DEFINED BY THE FORMULA VOPCQNZ, HAVING AN OXYGEN CONTENT IN THE RANGE OF ABOUT 7.3 TO 14.9 PERCENT BY WT., WHEREIN P AND Q MAY HAVE ANY RATIO TO ONE ANOTHER AND Z CAN RANGE FROM 0 TO 3 PERCENT BY WT., WITH A GAS COMPRISING FROM 0 TO 100 VOLUME PRE CENT OF HYDROGEN, 0 TO 100 VOLUME PERCENT OF NITROGEN, 0 TO 100 VOLUME PER CENT AMMONIA, THE SUM OF THE HYDROGEN, NITROGEN AND AMMONIA CONTENTS CONSTITUTING AT LEAST 50 VOLUME PER CENT OF SAID GAS.
Claim 3
Dependent Claim
26 words
The process according to claim 1, wherein natural gas is reacted with vanadium pentoxide to form an intermediate product which is then treated with said gas.
Claim 4
Dependent Claim
22 words
The process according to claim 2, wherein said natural gas is passed over said vanadium pentoxide for about 1 hour at 1,050*C.
Claim 5
Dependent Claim
13 words
The process according to claim 1, wherein said solid compound is vanadium oxycarbide.
Claim 6
Dependent Claim
26 words
The process according to claim 1, wherein said gas contains at least 80 volume per cent of hydrogen, nitrogen, and ammonia the remainder being inert gases.
Claim 7
Dependent Claim
30 words
The process according to claim 1, wherein said gas contains up to 10 volume per cent of a hydrocarbon gas selected from the group consisting of methane, ethane and propane.
Claim 8
Dependent Claim
11 words
The process according to claim 1, wherein pure hydrogen is used.
Claim 9
Dependent Claim
20 words
The process according to claim 1 wherein said gas consists essentially of hydrogen and the resulting product is vanadium carbide.
Claim 10
Dependent Claim
53 words
The process according to claim 1 wherein said gas consists essentially of a gas from the group consisting of ammonia and nitrogen and the product is selected from the group consisting of vanadium nitride; a mixture of vanadium carbonitride vanadium carbide, and vanadium nitride; and a mixture of vanadium nitride and vanadium carbide.
Claim 11
Dependent Claim
154 words
Process for the preparation of a material consisting mainly of at least one vanadium compound wherein the amount by weight, of C ranges from about 4.7 to 16.0%, the amount of N ranges from about 0 to 14.4% the amount of 0 ranges from about 0.2 to 1.7 and the amount of V ranges from about 79.1 to 82.6%, which comprises reacting at a temperature in the range from about 800*C to 1, 250*C a solid compound wherein the amount, by weight, of V ranges from about 72.2 to 78.7%, the amount of O ranges from about 7.3 to 14.9%, the amount of C ranges from about 10.1 to 16.9%, and the amount of N ranges from about 0 to 3%, with a gas comprising, by volume, 0 to 100% hydrogen, 0 to 100% nitrogen, and 0 to 100% ammonia, the sum of hydrogen, nitrogen and ammonia constituting at least 50% of said gas.
Claim 12
Dependent Claim
154 words
Process for the preparation of a material consisting mainly of at least one vanadium compound wherein the amount by weight, of C ranges from about 4.7 to 16.0%, the amount of N ranges from about 0 to 14.4% the amount of 0 ranges from about 0.2 to 1.7 and the amount of V ranges from about 79.1 to 82.6%, which comprises reacting at a temperature in the range from about 800*C to 1, 250*C a solid compound wherein the amount, by weight, of V ranges from about 72.2 to 78.7%, the amount of O ranges from about 7.3 to 14.9%, the amount of C ranges from about 10.1 to 16.9%, and the amount of N ranges from about 0 to 3%, with a gas comprising, by volume, 0 to 100% hydrogen, 0 to 100% nitrogen, and 0 to 100% ammonia, the sum of hydrogen, nitrogen and ammonia constituting at least 50% of said gas.
Claim 13
Dependent Claim
47 words
Process as defined by claim 10 wherein said temperature is about 1,050*C, wherein said solid compound consists essentially of, by weight, about 77.8% vanadium, about 10.2% carbon, and about 10.1% oxygen, and wherein said gas consists essentially of hydrogen and nitrogen present in the ratio of 1.1.
Claim 14
Dependent Claim
29 words
Process as defined by claim 10 wherein natural gas is passed over vanadium pentoxide for about 1 hour at a temperature of about 1,050*C to secure said solid compound.
Claim 15
Dependent Claim
66 words
Process as defined by claim 10 wherein said temperature is about 1,050*C, wherein said compound consists essentially of, by weight, about 77.8% vanadium, about 10.2% carbon, and about 10.1% oxygen, wherein said gas consists essentially of hydrogen and nitrogen present in the ratio of 1:1, and wherein said one vanadium compound consists essentially of about, by weight, 81.2% vanadium, 8.5% carbon, 0.5% oxygen, and 8.5% nitrogen.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |