US3626153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric halide vapor heater
Assignee: Laporte Titanium Ltd
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Filing: 1969-03-25
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Granted: 1971-12-07
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Expires: 1989-03-25
Abstract
Abstract A process and apparatus for heating the vapor of a halide of an element selected from the group consisting of titanium, silicon, aluminum, zirconium and iron and mixtures of such halides. The vapor to be heated is passed through a plurality of ducts which are arranged in parallel relation with one another and in which the vapor comes into contact with a plurality of resistance elements provided in the ducts. The resistance elements are formed of platinum or an alloy of platinum with rhodium, ruthenium or iridium. The inner surface of the ducts are formed of a nonmetallic refractory material which is inert with respect to the halide vapor to be heated. The vapor, in passing through the ducts, is heated by convection from the resistance elements and by radiation from the walls of the ducts.
Inventors
- 👤 Anthony Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:18
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; C; C01; C01G; C01G1/00; C01G1/06; C01G23/00; C01G23/04; C01G23/047; C01G23/07; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
293 words
An apparatus for heating the vapor of a halide of an element selected from the group consisting of titanium, silicon, aluminum, zirconium and iron and mixtures thereof which comprises an outer casing having an inlet and outlet, a lining of refractory material located within said casing, the inner surface of said lining defining a conduit through which the vapor to be heated may be passed from said inlet to said outlet, a plurality of supporting members, each member comprising a plurality of refractory plates positioned adjacent to one another in said conduit such that the plane of each plate is substantially perpendicular to the direction of the path of the vapor through said conduit, each of said plates having a plurality of apertures extending substantially parallel therethrough, at least the end plates in each of the supporting members having recesses in their end faces connecting said apertures in pairs, said plates being so positioned in said conduit that the apertures extending therethrough are in register with the apertures of each adjacent plate whereby a plurality of substantially continuous ducts are provided in said conduit; each of said supporting members being individually provided with at least one corrosion-resistant resistance heating element extending through at least two of said apertures and being of increased cross section where it passes laterally through said recess in the end plates of said supporting members from one aperture to the adjacent aperture of said pair, said resistance heating elements being so arranged and connected, that, in operation, the rate of generation of heat per unit surface area of the resistance heating elements decreases in the direction of flow of vapor through said conduit and means associated with each of said resistance heating elements adapted to supply electrical current thereto.
Claim 2
Independent Claim
293 words
An apparatus for heating the vapor of a halide of an element selected from the group consisting of titanium, silicon, aluminum, zirconium and iron and mixtures thereof which comprises an outer casing having an inlet and outlet, a lining of refractory material located within said casing, the inner surface of said lining defining a conduit through which the vapor to be heated may be passed from said inlet to said outlet, a plurality of supporting members, each member comprising a plurality of refractory plates positioned adjacent to one another in said conduit such that the plane of each plate is substantially perpendicular to the direction of the path of the vapor through said conduit, each of said plates having a plurality of apertures extending substantially parallel therethrough, at least the end plates in each of the supporting members having recesses in their end faces connecting said apertures in pairs, said plates being so positioned in said conduit that the apertures extending therethrough are in register with the apertures of each adjacent plate whereby a plurality of substantially continuous ducts are provided in said conduit; each of said supporting members being individually provided with at least one corrosion-resistant resistance heating element extending through at least two of said apertures and being of increased cross section where it passes laterally through said recess in the end plates of said supporting members from one aperture to the adjacent aperture of said pair, said resistance heating elements being so arranged and connected, that, in operation, the rate of generation of heat per unit surface area of the resistance heating elements decreases in the direction of flow of vapor through said conduit and means associated with each of said resistance heating elements adapted to supply electrical current thereto.
Claim 3
Dependent Claim
36 words
The apparatus defined in claiM 1 in which said resistance heating elements are flexible and are made of a material selected from the group consisting of platinum and alloys of platinum with rhodium, ruthenium or iridium.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |