Patent EP0199930A2 successfully refreshed from Google Patents.
EP0199930A2
Expired / Lapsed
EP
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Spray-dried inorganic oxides from non-aqueous gels or solutions
Assignee: Honeywell International Inc
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Filing: 1986-03-04
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Granted: —
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Expires: 2006-03-04
Abstract
Abstract Inorganic metal oxides having high surface area and pore volume are prepared by spray drying. The admixture which is spray dried to yield the metal oxides is produced from reactants comprising at least one hydrolyzable metal compound, a sufficient amount of water to at least partially hydrolyze the metal compound and an organic solvent. The admixture is supplied as a plurality of droplets to a reaction zone operated under conditions of temperature and pressure below the critical temperature and pressure of the reactants but sufficient to produce a product comprising metal oxide powders and a gas comprising organic solvent vapors. The powders are separated from the gas in a known fashion and collected. Spray drying of non-aqueous systems unexpectedly produces metal oxides having properties generally intermediate conventionally produced oxides and aerogels.
Inventors
- 👤 Gary Barton Marsh
- 👤 Anthony Joseph Fanelli
- 👤 John Nelson Armor
- 👤 Patrick Michael Zambri
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:59
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/02; B01J2/04; B82; B82Y; B82Y30/00; B01J2/06; B01J2/08; B01J21/00; B01J21/02; B01J21/04; B01J21/06; B01J21/063; B01J21/066; B01J37/00; B01J37/0009; B01J37/0027; B01J37/0045; C; C01; C01B; C01B13/00; C01B13/14; C01B13/34; C01F; C01F5/00; C01F5/02; C01F7/00; C01F7/02; C01F7/16; C01F7/162; C01F7/164; C01F7/34; C01F7/36; C01G; C01G23/00; C01G23/003; C01G23/006; C01G25/00; C01G25/02; C01P; C01P2002/00; C01P2002/70; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A process of producing metal oxide powders which comprises: (a) admixing reactants comprising an organic solvent, at least one hydrolyzable metal compound, and a sufficient amount of water to at least partially hydrolyze said hydrolyzable metal compound; (b) supplying the admixture as a plurality of droplets to a heating zone operated under conditions of temperature and pressure below the critical temperature and pressure of the reactants but sufficient to produce a product comprising metal oxide powders, and a gas ccm- prising organic solvent vapors; (c) separating said product from said gas; and, (d) collecting the product.
Claim 2
Dependent Claim
96 words
A process of producing metal oxide powders which comprises: (a) admixing reactants comprising an organic solvent, at least one hydrolyzable metal compound, and a sufficient amount of water to at least partially hydrolyze said hydrolyzable metal compound; (b) supplying the admixture as a plurality of droplets to a heating zone operated under conditions of temperature and pressure below the critical temperature and pressure of the reactants but sufficient to produce a product comprising metal oxide powders, and a gas ccm- prising organic solvent vapors; (c) separating said product from said gas; and, (d) collecting the product.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the admixture is supplied to the heating zone of a closed cycle spray drying apparatus.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein the organic solvent is selected from the group consisting of hydrocarbons, ketones, aliphatic or aromatic hydrocarbons, kerosenes, glycols, ethers, alcohols, or mixtures thereof.
Claim 5
Dependent Claim
36 words
The process of claim 1 wherein the hydrolyzable metal compound is an organometallic compound selected from the group of metal alkoxides, metal acetates, metal alkanoates, metal acetylacetonates, metal carboxylates, metal oxalates, metal citrates, or mixtures thereof.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein the energy supplied to the heating zone is sufficient to evaporate substantially all of the organic solvent and water.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the plurality of droplets are formed by supplying the admixture to a rotating disk located within the heating zone.
Claim 8
Dependent Claim
31 words
The process of claim 1 wherein the amount of water is no more than about 110% of the stoichiometric amount of water necessary to substantially completely hydrolyze the hydrolyzable metal compound.
Claim 9
Dependent Claim
18 words
The process of claim 4 wherein the organic solvent is an alcohol having one to five carbon atoms.
Claim 10
Dependent Claim
47 words
The process of claim 1 wherein the metal of the hydrolyzable metal compound is selected from the group of aluminum, barium, calcium, lithium, potassium, magnesium, cerium, lanthanum, titanium, zirconium, chromium, zinc, gallium, silicon, antimony, bismith, strontium, lead, iron, copper, yttrium, molybdenum, boron, tungsten, tin, or mixtures thereof.
Claim 11
Dependent Claim
24 words
The process of claim 1 wherein the reaction product comprises metal oxide powders having a primary particle size of less than about 1 p
References Cited (Backward Citations)
No citation records indexed.
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