Patent US3761576A successfully refreshed from Google Patents.
US3761576A
Expired / Lapsed
US
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Preparation of titanium carbide
Assignee: PPG Industries Inc
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Filing: 1970-08-24
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Granted: 1973-09-25
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Expires: 1990-08-24
Abstract
Abstract Titanium carbide, predominantly in the form of submicron small cubic crystals, is formed by reacting, in the vapor state, titanium halide, reducing agent and carbon source at carbideforming temperatures. High surface area titanium carbide is produced by establishing a stream of hot hydrogen and introducing titanium halide into said hydrogen stream at a point upstream of the point at which the carbon source is introduced into the hydrogen stream. When the order of introduction is reversed, the titanium carbide product surface area decreases.
Inventors
- 👤 F Groening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
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: 7
Claim 1
Independent Claim
12 words
The process of claim 1 wherein said titanium halide is titanium tetrachloride.
Claim 2
Dependent Claim
21 words
The process of claim 1 wherein said hydrogen-containing gas has a temperature of from about 1,500* C. to about 4,000* C.
Claim 3
Dependent Claim
16 words
The process of claim 3 wherein said hydrogen-containing gas has been heated by a plasma generator.
Claim 4
Dependent Claim
97 words
In the process of producing titanium carbide by the vapor phase reaction of titanium tetrachloride and a volatile carbon source selected from the group consisting of C1-C12 hydrocarbons, halogenated hydrocarbons and mixtures of such compounds in a reactor at titanium carbide forming temperatures, the improvement which comprises projecting a stream of hydrogen-containing gas into said reactor, introducing reactants titanium tetrachloride and volatile carbon source against said stream of hydrogen-containing gas, said titanium tetrachloride being introduced against said hydrogen stream upstream of the point of introduction of said volatile carbon source, and removing titanium carbide from said reactor.
Claim 5
Dependent Claim
11 words
The process of claim 5 wherein said hydrogen-containing gas is hydrogen.
Claim 6
Dependent Claim
11 words
The process of claim 5 wherein said carbon source is 1,1,2-trichloroethane.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein said hot hydrogen-containing gas has a heat content which is sufficient to maintain said reaction.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |