US3663283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of finely-divided metal oxides
Assignee: DANIEL J MOYNIHAN
•
Filing: 1969-10-02
•
Granted: 1972-05-16
•
Expires: 1989-10-02
Abstract
Abstract There is provided an improved process and apparatus for the production of finely-divided metal and metalloid oxides. The invention is generally characterized by the injection of a vaporized metal halide feedstock through a plurality of circumferential orifices and substantially perpendicularly into a plug flow stream comprising heated oxidant gas. Additionally, thin sheeted streams of a purge gas are directed into said oxidant gas stream at loci positioned substantially immediately above and below the locus of the metal halide vapor injection.
Inventors
- 👤 Richard A Hebert
- 👤 Daniel J Moynihan
- 👤 Donald E Paul
- 👤 Louis J Petrovic
- 👤 Peter A Rubel
- 👤 Ralph Seferian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:29
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/80
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
28 words
The process of claim 1 wherein heating of said oxidant gas stream is accomplished by combustion of a fuel gas with an excess of an oxygen containing gas.
Claim 2
Dependent Claim
11 words
The process of claim 2 wherein said oxygen-containing gas is oxygen.
Claim 3
Dependent Claim
11 words
The process of claim 2 wherein the oxygen-containing gas is air.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said fuel gas is carbon monoxide.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein said metal halidE is chosen from the group consisting of the vaporizable halides of titanium, zirconium, aluminum, silicon and mixtures thereof.
Claim 6
Dependent Claim
12 words
The process of claim 6 wherein said metal halide is titanium tetrachloride.
Claim 7
Dependent Claim
12 words
The process of claim 6 wherein said metal halide is aluminum trichloride.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein said metal halide is silicon tetrachloride.
Claim 9
Dependent Claim
33 words
The process of claim 1 wherein said metal halide vapors are injected into said enclosed plug flow oxidant gas stream through at least four of said substantially equiangularly, perpendicularly and radially positioned orifices.
Claim 10
Dependent Claim
118 words
The process of claim 1 wherein the geometries of the orifices and the cross section of the oxidant gas stream are substantially circular and said metal halide vapors are injected into said oxidant gas stream substantially in accordance with the equation: wherein N number of orifices DH diameter of orifices (inches) DR diameter across oxidant-containing gas stream enclosure taken at level of ori-fices (inches) Rho H density of metal halide containing gases injected through orifices (lbs./ft.3) Rho R density of oxidant containing gases (lbs./ft.3) VH volume flow rate of metal halide containing gases through orifices (ft.3/hr.) VR volume flow rate of oxidant containing gases (ft.3/hr.) and wherein said RATIO is maintained at between about 5 and about 50.
Claim 11
Dependent Claim
17 words
The process of claim 11 wherein said RATIO is maintained at between about 10 and about 20.
Claim 12
Dependent Claim
95 words
The process of claim 1 wherein said slotted purge gas stream injected in (c) is directed into said oxidant gas stream at an angle of between about 60* upwardly to about 180* downwardly with respect to the direction of flow of said oxidant gas stream. 14 The process of claim 1 wherein said slotted purge gas stream injected in (d) is directed into said oxidant gas/metal halide vapor stream at an angle of between about 0* upwardly to about 180* downwardly with respect to the direction of flow of said oxidant gas/metal halide vapor stream.
Claim 13
Dependent Claim
38 words
The process of claim 14 wherein said slotted purge gas stream is injected at an angle of between about 90* to about 20* upwardly with respect to the direction of flow of said oxidant gas/metal halide vapor stream.
Claim 14
Dependent Claim
26 words
The process of claim 1 wherein said inert purge gas is carbon dioxide; nitrogen; carbon monoxide; a halogen; recycled, cooled and filtered off-gas or mixtures thereof.
Claim 15
Dependent Claim
28 words
The process of claim 1 wherein said inert purge gas is injected in steps (c) and (d) at temperatures of between about 10* C. and about 50* C.
Claim 16
Dependent Claim
72 words
The process of claim 1 wherein each of said slotted purge gas streams of steps (c) and (d) is operated substantially in accordance with the equation wherein Hp slot width (inches) Mpg molar purge gas rate (lb. moles/hr.) Mmh molar gas rate through orifices (lb. moles/hr.) DH diameter of feedstock injection orifices (inches) N number of feedstock injection orifices DR diameter across oxidant containing gas stream taken at level of orifices (inches)
Claim 17
Dependent Claim
37 words
The process of claim 18 wherein in step (c) the MOV RATIO is maintained at between about 0.4 and about 1.0 and, in step (d), the MOV RATIO is maintained at between about 1.0 and about 5.0.
Claim 18
Dependent Claim
37 words
The process of claim 18 wherein in step (c) the MOV RATIO is maintained at between about 0.43 and about 1.0 and, in step (d) the MOV RATIO is maintained at between about 1.0 and about 1.5
Claim 19
Dependent Claim
83 words
The process of claim 1 wherein (a) titanium tetrachloride is the vaporous metal halIde feedstock; (b) the oxidant gas stream is formed by a combustion reaction employing carbon monoxide as the fuel; (c) oxygen is the oxidant for both the carbon monoxide and the titanium tetrachloride feedstock; (d) carbon dioxide is employed as a combustion reaction modifier; and wherein molar ratios are maintained as follows: CO/TiCl4, about 0.5 to about 1.8 CO2/TiCl4, about 0.0 to about 1.0 O2(TiCl4)/TiCl4, about 1.0 to about 2.6
Claim 20
Dependent Claim
31 words
The process of claim 21 wherein said molar ratios are maintained as follows: CO/TiCl4, about 0.6 to about 1.0 CO2/TiCl4, about 0.4 to about 0.6 O2(TiCl4)/TiCl4, about 1.2 to about 1.6
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |