US5089248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metallic oxides
Assignee: Individual
•
Filing: 1990-05-14
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Granted: 1992-02-18
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Expires: 2010-05-14
Abstract
Abstract Metal oxides prepared by exchange reactions between organosemiconductor oxides (such as disiloxanes) and metal coordination compounds (such as neutral metal complexes, metal chelates and chlorometalates), metallic halides (such as zinc chloride), or organometallic compounds (such as methylithium) in inert environments and anhydrous solvents.
Inventors
- 👤 Masud Akhtar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:56
CPC Classifications
C; C01; C01G; C01G5/00; C01B; C01B13/00; C01B13/14; C01B13/32; C01G9/00; C01G9/02; C01P; C01P2004/00; C01P2004/60; C01P2004/62
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
A method of preparing metallic oxides, conisting essentially of: (a) providing a solution of a metallic compound with a metallic component selected from lithium, silver, zinc, indiun, tin, zirconium, molybdenum, irridium and nickel in an anhydrous solvent; (b) reacting said compound with an organodisiloxane; whereby said organodisiloxane reacts with the metallic compound to deposit a metallic oxide; and (c) recovering said metallic oxide.
Claim 2
Independent Claim
63 words
A method of preparing metallic oxides, conisting essentially of: (a) providing a solution of a metallic compound with a metallic component selected from lithium, silver, zinc, indiun, tin, zirconium, molybdenum, irridium and nickel in an anhydrous solvent; (b) reacting said compound with an organodisiloxane; whereby said organodisiloxane reacts with the metallic compound to deposit a metallic oxide; and (c) recovering said metallic oxide.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the metallic compound is a metallic coordination compound.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein the metallic coordination compound is a neutral metal complex contining ligands coordinating through nitrogen, phosphorous, oxygen or sulfur atoms.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the metallic compound is a metallic halide.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the metallic compound is an organometallic compound.
Claim 7
Dependent Claim
78 words
A method of preparing metallic oxides in accordance with claim 1 wherein a metallic compound in the form of silver chloride (AGCl) is dissolved in clacium chliride (CaCl 2 ) saturatred dimethylsulfoxide to form Ca(AgCl 2 ) 2 ; silver oxide is then produced by treatng the foregoing solution with a stoichiometric amount of hexamethyldisiloxane in ethyl ether; and Ag 2 O immediately precipitates, leaving calcium chloride and trimethyl-chlorosilane (CH 3 ) 3 SiCl in the supernatent liquid.
Claim 8
Dependent Claim
19 words
A method of preparing metallic oxides in accordance with claim 1 wherein the concentration of the reactants is adjusted.
Claim 9
Dependent Claim
47 words
A method of preparing metallic oxides in accordance with claim 1 wherein zince oxide of a particle size ranging from about 0.1 micron to b 0.2 micron is prepared by mixing equimolar solutions of zinc chloride and hexamethydisiloxane in ethylether at a temperature of about 0° C.
Claim 10
Dependent Claim
29 words
A method of preparing metallic oxides in accordance with claim 1 wherein at temperatures higher than 0° C., the reaction rate for the deposition of metal oxide is increased.
Claim 11
Dependent Claim
30 words
A method of preparing metallic oxides in accordance with claim 1 wherein a triethylenglycoldiamine complex of metal halide is added to an equimolar solution of hexamethyldisiloxane in ethylether or dichloromethane.
Claim 12
Dependent Claim
31 words
A method of preparing metallic oxides in accordance with claim 1 wherein concentrations and reaction temperatures are adjusted in the range of -20° to 100° C., to prepare metal oxide particles.
Claim 13
Dependent Claim
22 words
The method of claim 1 wherein said organodisiloxane is selected from the group consisting of hexamethyldisiloxane, hexaethyldisiloxane, hexaphenyldisilozane and 1, 1, 3,3-tetraphenyl-1-3-dimethyldisiloxane.
Claim 14
Dependent Claim
23 words
The method of claim 1 wherein said organodisiloxane is selected from the group consisting of hexamethyldisiloxane, hexaethyldisiloxane, hexaphenyldisiloxane and 1, 1, 3, 3-tetraphenyl-1-3-dimethyldisiloxane.
Claim 15
Dependent Claim
77 words
A method of preparing metallic oxides in accordance with claim 1 wherein a metallic compound in the form of the molybendum complex, tribromotripyridinemolybdenum (MoBr 3 Py 3 , where Py is pyridine), is disolved in chloroform and added to an excess of one molar dichloromethane solution of hexamethyldisiloxane at a temperature in the range from about 20 to 50° C., with the result that molydemum oxide, MoO 3 , settles at the bottom of the reaction vessel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |