US4587232A
Expired / Lapsed
US
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Inorganic adsorbent and process for production thereof
Assignee: Hitachi Ltd
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Filing: 1983-09-29
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Granted: 1986-05-06
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Expires: 2003-09-29
Abstract
Abstract An inorganic adsorbent comprising a porous titanium metal and titanium oxide sintered and impregnated on the surfaces of micropores of the porous titanium metal can be produced by impregnating the porous titanium metal with a titanium alkoxide solution, followed by hydrolysis and oxidation to give titanium oxide, and can be used for selectively removing transition metal ions in a water coolant of nuclear reactor.
Inventors
- 👤 Fumio Kawamura
- 👤 Makoto Kikuchi
- 👤 Kiyomi Funabashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:09
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G51/00; C01G51/01; C02; C02F; C02F1/00; C02F1/28; C02F1/281; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0265; C22B60/0273; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
46 words
An inorganic adsorbent comprising a porous titanium metal and titanium oxide sintered and impregnated on the surfaces of micropores of said porous titanium metal; said titanium oxide being obtained from a titanium alkoxide of the formula: Ti(OR) 4 , wherein R is a lower alkyl group.
Claim 2
Dependent Claim
46 words
An inorganic adsorbent comprising a porous titanium metal and titanium oxide sintered and impregnated on the surfaces of micropores of said porous titanium metal; said titanium oxide being obtained from a titanium alkoxide of the formula: Ti(OR) 4 , wherein R is a lower alkyl group.
Claim 3
Dependent Claim
19 words
An inorganic adsorbent according to claim 1, wherein the lower alkyl group contains from 1 to 6 carbon atoms.
Claim 4
Dependent Claim
14 words
An inorganic adsorbent according to claim 1, wherein the titanium alkoxide is titanium tetraisopropoxide.
Claim 5
Dependent Claim
99 words
A process for producing an inorganic adsorbent which comprises a step of impregnating a porous titanium metal with a titanium alkoxide solution to attach and hold the titanium alkoxide on micropores of the porous titanium metal, a step of hydrolyzing the titanium alkoxide attached and held on the micropores to give hydrous titanium oxide, and a step of changing the hydrous titanium oxide to titanium oxide by heating the porous titanium metal holding the hydrous titanium oxide and at the same time sintering and impregnating the resulting titanium oxide on the surfaces of micropores of the porous titanium metal.
Claim 6
Dependent Claim
99 words
A process for producing an inorganic adsorbent which comprises a step of impregnating a porous titanium metal with a titanium alkoxide solution to attach and hold the titanium alkoxide on micropores of the porous titanium metal, a step of hydrolyzing the titanium alkoxide attached and held on the micropores to give hydrous titanium oxide, and a step of changing the hydrous titanium oxide to titanium oxide by heating the porous titanium metal holding the hydrous titanium oxide and at the same time sintering and impregnating the resulting titanium oxide on the surfaces of micropores of the porous titanium metal.
Claim 7
Dependent Claim
25 words
A process according to claim 4, wherein the titanium alkoxide is represented by the formula: Ti(OR) 4 , wherein R is a lower alkyl group.
Claim 8
Dependent Claim
13 words
A process according to claim 5, wherein the titanium alkoxide is titanium tetraisopropoxide.
Claim 9
Dependent Claim
17 words
A process according to claim 4, wherein the hydrolysis is conducted in an atmosphere of water vapor.
Claim 10
Dependent Claim
17 words
A process according to claim 4, wherein the hydrolysis is conducted in an atmosphere of ammonia vapor.
Claim 11
Dependent Claim
19 words
A process according to claim 4, wherein the hydrolysis is conducted at a temperature of 70° to 80° C.
Claim 12
Dependent Claim
25 words
A process according to claim 4, wherein the step of sintering and impregnating titanium oxide is conducted at a temperature of 500° to 700° C.
Claim 13
Dependent Claim
109 words
A process for producing an inorganic adsorbent which comprises a step of subjecting a porous titanium metal to vacuum extraction, a step of impregnating the porous titanium metal with a titanium alkoxide solution to attach and hold the titanium alkoxide on micropores of the porous titanium metal, a step of hydrolyzing the titanium alkoxide attached and held on the micropores to give hydrous titanium oxide, and a step of changing the hydrous titanium oxide to titanium oxide by heating the porous titanium metal holding the hydrous titanium oxide and at the same time sintering and impregnating the resulting titanium oxide on the surfaces of micropores of porous titanium metal.
Claim 14
Dependent Claim
109 words
A process for producing an inorganic adsorbent which comprises a step of subjecting a porous titanium metal to vacuum extraction, a step of impregnating the porous titanium metal with a titanium alkoxide solution to attach and hold the titanium alkoxide on micropores of the porous titanium metal, a step of hydrolyzing the titanium alkoxide attached and held on the micropores to give hydrous titanium oxide, and a step of changing the hydrous titanium oxide to titanium oxide by heating the porous titanium metal holding the hydrous titanium oxide and at the same time sintering and impregnating the resulting titanium oxide on the surfaces of micropores of porous titanium metal.
Claim 15
Dependent Claim
13 words
A process according to claim 11, wherein the titanium alkoxide is titanium tetraisopropoxide.
Claim 16
Dependent Claim
17 words
A process according to claim 11, wherein the hydrolysis is conducted in an atmosphere of water vapor.
Claim 17
Dependent Claim
17 words
A process according to claim 11, wherein the hydrolysis is conducted in an atmosphere of ammonia vapor.
Claim 18
Dependent Claim
19 words
A process according to claim 11, wherein the hydrolysis is conducted at a temperature of 70° to 80° C.
Claim 19
Dependent Claim
25 words
A process according to claim 11, wherein the step of sintering and impregnating titanium oxide is conducted at a temperature of 500° to 700° C.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |