US3661524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of titanium carbide
Assignee: PPG Industries Inc
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Filing: 1970-04-14
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Granted: 1972-05-09
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Expires: 1990-04-14
Abstract
Abstract Titanium carbide, usually in finely divided, particulate form and often predominantly in the form of small cubic crystals having a particle size range of from about 0.02 to about 1.0 micron and a weight median particle size of from about 0.08 to about 0.8 micron, is formed by reacting titanium halide in vapor state with halogenated hydrocarbon, e.g., chlorinated hydrocarbon, and hydrogen at carbide-forming temperatures. Control of the titanium carbide particle size is obtained by conducting the reaction in the presence of a nucleating amount of hydrocarbon, such as methane.
Inventors
- 👤 Calvin B Holden
- 👤 William L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/921; B; B82; B82Y; B82Y30/00; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
13 words
The process of claim 1 wherein said halogenated hydrocarbon is a chlorinated hydrocarbon.
Claim 2
Dependent Claim
31 words
The process of claim 2 wherein said titanium halide is selected from the group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide and titanium tetrafluoride and said reducing agent is hydrogen.
Claim 3
Dependent Claim
10 words
The process of claim 3 wherein said hydrocarbon is methane.
Claim 4
Dependent Claim
24 words
The process of claim 3 wherein the titanium carbide produced has a weight median particle size of from about 0.08 to about 0.8 micron.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein said hydrocarbon has from one to 12 carbon atoms and is present in amounts sufficient to provide from about 0.5 to about 5 atom percent of carbon.
Claim 6
Dependent Claim
65 words
In the process of producing titanium carbide by vapor phase reaction of titanium tetrachloride, hydrogen and halogenated hydrocarbon, the improvement which comprises conducting said reaction in the presence of a nucleating amount of C1-C12 hydrocarbon, thereby to control the particle size of the titanium carbide produced, and recovering titanium carbide product having a weight median particle size of from about 0.08 to about 0.8 micron.
Claim 7
Dependent Claim
24 words
The process of claim 7 wherein said C1-C12 hydrocarbon provides from about 0.1 to about 10 atom percent of carbon based on titanium tetrachloride.
Claim 8
Dependent Claim
13 words
The process of claim 7 wherein said halogenated hydrocarbon is a chlorinated hydrocarbon.
Claim 9
Dependent Claim
11 words
The process of claim 9 wherein said chlorinated hydrocarbon is 1,1,2-trichloroethane.
Claim 10
Dependent Claim
62 words
In the process of producing titanium carbide by vapor phase reaction of titanium tetrachloride, hydrogen and halogenated hydrocarbon, the improvement which comprises conducting said reaction in the presence of an amount of C1-C12 hydrocarbon sufficient to provide from 0.5 to about 5 atom percent of carbon based on the titanium halide whereby to control the particle size of the titanium carbide produced.
Claim 11
Dependent Claim
13 words
The process of claim 11 wherein said halogenated hydrocarbon is a chlorinated hydrocarbon.
Claim 12
Dependent Claim
16 words
The process of claim 12 wherein said chlorinated hydrocarbon is 1,1,2-trichloroethane and said hydrocarbon is methane.
Claim 13
Dependent Claim
24 words
The process of claim 12 wherein the titanium carbide produced has a weight median particle size of from about 0.08 to about 0.8 micron.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |