CA2889361A1 - Method for high efficiency tungsten oxide & tungsten oxide compound nanoparticle creation - Google Patents
Method for high efficiency tungsten oxide & tungsten oxide compound nanoparticle creation Download PDFInfo
- Publication number
- CA2889361A1 CA2889361A1 CA2889361A CA2889361A CA2889361A1 CA 2889361 A1 CA2889361 A1 CA 2889361A1 CA 2889361 A CA2889361 A CA 2889361A CA 2889361 A CA2889361 A CA 2889361A CA 2889361 A1 CA2889361 A1 CA 2889361A1
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- CA
- Canada
- Prior art keywords
- tungsten
- solid
- powder
- domain
- electrical potential
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
- C01G41/02—Oxides; Hydroxides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
A method for producing a tungsten Trioxide powder for various applications according to the present invention is characterized by comprising a sublimation step for obtaining a tungsten Trioxide powder by subliming a tungsten powder,tungsten compound, or tungsten solid rod, bar, sheet, or foil by using an oxy-hydrogen flame, under controlled and varied conditions, with or without AC
or DC enhancement for the purposes of controlling particle size as a secondary potential for particle size range control.
or DC enhancement for the purposes of controlling particle size as a secondary potential for particle size range control.
Description
Technical Field The present invention relates to a method for producing Tungsten Trioxide in a large range of micro to nano sized particles which have various application such as a electrosensitive phase change visible light window coating (smart windows), photocatalytic use, and as a catalyst for various purposes.
Background Art Many potential tungsten trioxide applications are still in development at this time, and in those various emergent areas of application, various sizes and range of size of microparticle to nanoparticles are desired. Various methods and processes have been proposed and developed in order to obtain such base or end point tungsten Oxide micro to nano sized particles. Various levels of efficacy of both costing and materials efficiency have been reached. As the tungsten oxides are a base cost material in given processes, this does add a multiplier effect in final usage cost and pricing structures. Many potential applications for tungsten oxide micro to nano sized particles are not enacted due to costing issues which limit their viability in the given associated markets.
Manufacturing efficiency, manufacturing simplicity, and reductions in costing of tungsten trioxide and tungsten compounds, would be required in order to allow for those final applications to go forward in their given markets.
Disclosure of Invention As a method of reaching the correct stoichiometric mixture of oxy-hydrogen, a specific form of electrolysis is used, and this common-ducted mixture allows for a specific level of temperature and oxidizing rate control. This controlled mixture ratio gives the opportunity to reach stable output when employed along with secondary components like feed rate, thermal flow and oxidizing rate, as a set, to help a more specific particle size range to be created during the oxidization process enacted upon the tungsten or tungsten compound.
The secondary component that can be enacted, alongside the above process, for a more specific control of particle size range, is the addition of electrical field modulation between the anode and cathode arrangement of the tungsten or tungsten compound bars. The electrical field and current flow can be either AC, DC or both, in either polarity, depending on the given desired particle size and type of output from the process.
A single tungsten or tungsten alloy compound or rod can be the objective, and the field modulation can be between the torch body (metallic conductive torch body) and single or multiple of tungsten bars, rods, or various shaped tungsten or tungsten alloy solids, or tungsten and tungsten compounds. This electrical modulation and/or bias enables a more controlled micro-calving aspect of the tungsten objective as it shifts to being an oxide, while immersed in the oxidizing plasma of the oxy-hydrogen flame.
A third method of controlling the tungsten trioxide particle size is introduced by the mechanism of controlling ambient air temperature injection in the plasma reaction zone. Refining of the three techniques individually or as a set, is what can bring the particle size range to the desired condition.
A fourth method of altering the process output size and particle shape type is the addition of physical modulation of the given rod or compound that is immersed in the oxidizing plasma, this can be enacted alongside any of the above processes.
A fifth method of altering the process output size and particle shape type is the addition of externally applied acoustic modulation of the given plasma reaction zone. This can be enacted alongside any of the above processes.
Background Art Many potential tungsten trioxide applications are still in development at this time, and in those various emergent areas of application, various sizes and range of size of microparticle to nanoparticles are desired. Various methods and processes have been proposed and developed in order to obtain such base or end point tungsten Oxide micro to nano sized particles. Various levels of efficacy of both costing and materials efficiency have been reached. As the tungsten oxides are a base cost material in given processes, this does add a multiplier effect in final usage cost and pricing structures. Many potential applications for tungsten oxide micro to nano sized particles are not enacted due to costing issues which limit their viability in the given associated markets.
Manufacturing efficiency, manufacturing simplicity, and reductions in costing of tungsten trioxide and tungsten compounds, would be required in order to allow for those final applications to go forward in their given markets.
Disclosure of Invention As a method of reaching the correct stoichiometric mixture of oxy-hydrogen, a specific form of electrolysis is used, and this common-ducted mixture allows for a specific level of temperature and oxidizing rate control. This controlled mixture ratio gives the opportunity to reach stable output when employed along with secondary components like feed rate, thermal flow and oxidizing rate, as a set, to help a more specific particle size range to be created during the oxidization process enacted upon the tungsten or tungsten compound.
The secondary component that can be enacted, alongside the above process, for a more specific control of particle size range, is the addition of electrical field modulation between the anode and cathode arrangement of the tungsten or tungsten compound bars. The electrical field and current flow can be either AC, DC or both, in either polarity, depending on the given desired particle size and type of output from the process.
A single tungsten or tungsten alloy compound or rod can be the objective, and the field modulation can be between the torch body (metallic conductive torch body) and single or multiple of tungsten bars, rods, or various shaped tungsten or tungsten alloy solids, or tungsten and tungsten compounds. This electrical modulation and/or bias enables a more controlled micro-calving aspect of the tungsten objective as it shifts to being an oxide, while immersed in the oxidizing plasma of the oxy-hydrogen flame.
A third method of controlling the tungsten trioxide particle size is introduced by the mechanism of controlling ambient air temperature injection in the plasma reaction zone. Refining of the three techniques individually or as a set, is what can bring the particle size range to the desired condition.
A fourth method of altering the process output size and particle shape type is the addition of physical modulation of the given rod or compound that is immersed in the oxidizing plasma, this can be enacted alongside any of the above processes.
A fifth method of altering the process output size and particle shape type is the addition of externally applied acoustic modulation of the given plasma reaction zone. This can be enacted alongside any of the above processes.
Claims (9)
1. A method for producing tungsten trioxide powder comprising subliming a tungsten powder or solid rod, bar, sheet, or foil by a oxy-hydrogen mixture;
and where the flame propagation rate and contact area with the solid or powder is adjusted to obtain specific Tungsten trioxide particle size ranges.
and where the flame propagation rate and contact area with the solid or powder is adjusted to obtain specific Tungsten trioxide particle size ranges.
2. The method according to claim 1 where electrical potential differential in the DC domain is introduced to the process proper, via anode or electrode termination to the powder or solid; and an opposing polarity is applied to the flame source point.
3. The method according to claim 1 where electrical potential differential in the AC domain is introduced to the process proper, via anode or electrode termination to the powder or solid; and an opposing polarity is applied to the flame source point.
4. The method according to claim 1 where electrical potential differential in the AC and DC domain is introduced to the process proper, via anode or electrode termination to the powder or solid; and an opposing polarity is applied to the flame source point.
5. The method according to claim 1 where electrical potential differential in the DC domain is introduced to the process proper, via anode or electrode termination to the one tungsten solid; and an opposing polarity is applied to a tungsten solid that is jointly in-situ to the first tungsten solid, with a physical gap between the two solids.
6. The method according to claim 1 where electrical potential differential in the AC domain is introduced to the process proper, via anode or electrode termination to the one tungsten solid; and an opposing polarity is applied to a tungsten solid that is jointly in-situ to the first tungsten solid, with a physical gap between the two solids.
7. The method according to claim 1 where electrical potential differential in the AC and DC domain is introduced to the process proper, via anode or electrode termination to the one tungsten solid; and an opposing polarity is applied to a tungsten solid that is jointly in-situ to the first tungsten solid, with a physical gap between the two solids.
8. The method according to claim 1 where air flow in the plasma oxidizing reaction zone is controlled to be at specific levels and specific temperatures.
9. The method according to claim 1 where sonic modulation of the plasma flame and oxidation zone is introduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2889361A CA2889361A1 (en) | 2015-04-28 | 2015-04-28 | Method for high efficiency tungsten oxide & tungsten oxide compound nanoparticle creation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2889361A CA2889361A1 (en) | 2015-04-28 | 2015-04-28 | Method for high efficiency tungsten oxide & tungsten oxide compound nanoparticle creation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2889361A1 true CA2889361A1 (en) | 2016-10-28 |
Family
ID=57215484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2889361A Abandoned CA2889361A1 (en) | 2015-04-28 | 2015-04-28 | Method for high efficiency tungsten oxide & tungsten oxide compound nanoparticle creation |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2889361A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472640A (en) * | 2015-10-30 | 2018-08-31 | Ifp 新能源公司 | The catalyst composition and its purposes in alkene oligomerization process based on nickel in the presence of specific activator |
-
2015
- 2015-04-28 CA CA2889361A patent/CA2889361A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472640A (en) * | 2015-10-30 | 2018-08-31 | Ifp 新能源公司 | The catalyst composition and its purposes in alkene oligomerization process based on nickel in the presence of specific activator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20180430 |