US5064690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating surface of inactive granules
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1990-03-12
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Granted: 1991-11-12
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Expires: 2010-03-12
Abstract
Abstract A method for coating the surface of inactive granules comprises dispersing inactive granules having water adsorbed in advance on the surface thereof in a solution having a higher fatty acid and a metal alkoxide dissolved in small amounts in a non-hydrophilic organic solvent thereby forming on the surface of the granules a dense layer of microfine metal oxide powder produced in consequence of hydrolysis of the metal alkoxide.
Inventors
- 👤 Mutsuo Sando
- 👤 Masanobu Awano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/62605; C04B35/62625; C04B35/6264; C04B35/628; C04B35/62802; C04B35/62805; C04B35/62807; C04B35/62818; C04B35/62823; C04B35/62897; C04B41/00; C04B41/009; C04B41/45; C04B41/4584; C04B41/80; C04B41/81; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3045; C09C1/3054; C09C1/309; C09C1/40; C09C1/407; C09C3/00; C09C3/006; C09C3/06; C09C3/063; C09C3/08; C01; C01P; C01P2004/00; C01P2004/50; C01P2004/80; C01P2004/82; C01P2004/84; C01P2004/86; C01P2006/00; C01P2006/12; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3231; C04B2235/3244; C04B2235/44; C04B2235/441; C04B2235/50; C04B2235/54; C04B2235/5409
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
A method for coating inactive granules, consisting essentially of causing inactive granules having water adsorbed in advance on the surface thereof to contact a composition comprising a non-hydrophilic organic solvent 0.5 to 20 wt%, based on said solvent, of a metal alkoxide, and a higher fatty acid present in an amount in the range of 0.005 to 0.05 mol per liter of said non-hydrophilic organic solvent, thereby forming on the surface of said inactive granules a dense layer of microfine metal oxide powder formed in consequence of the hydrolysis of said metal alkoxide.
Claim 2
Independent Claim
93 words
A method for coating inactive granules, consisting essentially of causing inactive granules having water adsorbed in advance on the surface thereof to contact a composition comprising a non-hydrophilic organic solvent 0.5 to 20 wt%, based on said solvent, of a metal alkoxide, and a higher fatty acid present in an amount in the range of 0.005 to 0.05 mol per liter of said non-hydrophilic organic solvent, thereby forming on the surface of said inactive granules a dense layer of microfine metal oxide powder formed in consequence of the hydrolysis of said metal alkoxide.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein said non-hydrophilic organic solvent is one member selected from the group consisting of benzene, toluene, xylene, kerosene, and ligroin.
Claim 4
Dependent Claim
23 words
A method according to claim 2, wherein said non-hydrophilic organic solvent is one member selected from the group consisting of benzene and ligroin.
Claim 5
Dependent Claim
25 words
A method according to claim 1, wherein said higher fatty acid is one member selected from among fatty acids of 10 to 30 carbon atoms.
Claim 6
Dependent Claim
35 words
A method according to claim 4, wherein said higher fatty acid is one member selected from the group consisting of n-caproic acid, n-capric acid, n-capyrlic acid, lauric acid, myristic acid, palmitic acid, and stearic acid.
Claim 7
Dependent Claim
25 words
A method according to claim 5, wherein said higher fatty acid is one member selected from the group consisting of stearic acid and n-caproic acid.
Claim 8
Dependent Claim
24 words
A method according to claim 1, wherein said metal alkoxide is one member selected from the group consisting of silicon methoxide and silicon ethoxide.
Claim 9
Dependent Claim
33 words
A method according to claim 7, wherein said metal alkoxide is used in an amount in the range of 5 to 20% by weight based on the amount of said non-hydrophilic organic solvent.
Claim 10
Dependent Claim
28 words
A method according to claim 1, wherein said metal alkoxide is one member selected from the group consisting of tin ethoxide, zinc ethoxide, zirconium propoxide, and zirconium butoxide.
Claim 11
Dependent Claim
33 words
A method according to claim 9, wherein said metal alkoxide is used in an amount in the range of 0.5 to 5% by weight based on the amount of said non-hydrophilic organic solvent.
Claim 12
Dependent Claim
28 words
A method according to claim 1, wherein said inactive granules are dispersed in said non-hydrophilic organic solvent having said higher fatty acid and said metal alkoxide dissolved therein.
Claim 13
Dependent Claim
53 words
A method according to claim 1, wherein said inactive granules are dispersed in said non-hydrophilic organic solvent having said higher fatty acid and said metal alkoxide dissolved therein and then a mixed liquid consisting of said non-hydrophilic organic solvent and said metal alkoxide is added to the resultant dispersion of said inorganic granules.
Claim 14
Dependent Claim
34 words
A method according to claim 1, wherein the thickness of said dense layer formed on the surface of said granules is controlled by the amount of water adsorbed on the surface of said granules.
Claim 15
Dependent Claim
21 words
A method according to claim 1, wherein said dense layer has a thickness in the range of 1 to 20 nm.
References Cited (Backward Citations)
US3522079A
Cited
US3522078A
Cited
US4376721A
Cited
JPS5925901A
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US4900701A
Cited
US4772576A
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US4806428A
Cited
US4900587A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
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