US4176091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Denitrating catalysts having porous coating and process for producing same
Assignee: Kanadevia Corp
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Filing: 1978-07-24
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Granted: 1979-11-27
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Expires: 1998-07-24
Abstract
Abstract A denitrating catalyst having a porous coating is produced by immersing a catalyst base of porous metal in a silica-containing coating bath, drying the catalyst base to form a carrier having a porour silica coating, immersing the carrier in a solution containing an active component and drying the resulting carrier to cause the carrier to support the active component thereon.
Inventors
- 👤 Hideya Inaba
- 👤 Hisao Ogiyama
- 👤 Masayoshi Ichiki
- 👤 Yasumi Kamino
- 👤 Nobuo Matsumoto
- 👤 Kenichi Nagai
- 👤 Masami Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:03
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J; B01J37/00; B01J37/02; B01J37/024
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
65 words
A process for producing a denitrating catalyst comprising the step of forming a carrier having a porous silica coating by immersing a catalyst base of porous metal in a silica-containing coating bath and drying the base, and the step of causing the carrier to support an active component thereon by immersing the carrier in a solution containing the active component and drying the resulting carrier.
Claim 2
Dependent Claim
65 words
A process for producing a denitrating catalyst comprising the step of forming a carrier having a porous silica coating by immersing a catalyst base of porous metal in a silica-containing coating bath and drying the base, and the step of causing the carrier to support an active component thereon by immersing the carrier in a solution containing the active component and drying the resulting carrier.
Claim 3
Dependent Claim
33 words
A process as defined in claim 1 wherein the porous catalyst base is formed by treating a metal material having an aluminum alloy surface layer with an aluminum-dissolving solution to dissolve out aluminum.
Claim 4
Dependent Claim
16 words
A process as defined in claim 1 wherein the coating bath is an acid colloidal siica.
Claim 5
Dependent Claim
41 words
A process as defined in claim 1 wherein the coating bath is a mixture of colloidal silica and containing an emulsion of high molecular weight organic compound, and the base is baked after having been immersed in the bath and dried.
Claim 6
Dependent Claim
35 words
A process as defined in claim 4 wherein the high molecular weight organic compound is contained in an amount of 10 to 50 parts by weight per 100 parts by weight of SiO 2 .
Claim 7
Dependent Claim
19 words
A process as defined in claim 4 wherein the coating bath is a colloidal silica containing a titanium compound.
Claim 8
Dependent Claim
34 words
A process as defined in claim 6 wherein the content of the titanium compound calculated as TiO 2 is 40 to 100 parts by weight per 100 parts by weight of SiO 2 .
Claim 9
Dependent Claim
19 words
A process as defined in claim 5 wherein the coating bath is a colloidal silica containing a tin compound.
Claim 10
Dependent Claim
34 words
A process as defined in claim 8 wherein the content of the tin compound calculated as SnO 2 is 30 to 70 parts by weight per 100 parts by weight of SiO 2 .
Claim 11
Dependent Claim
20 words
A process as defined in any one of claims 1 to 4 wherein the active component is a vanadium compound.
Claim 12
Dependent Claim
28 words
A process as defined in claim 10 wherein the vanadium compound is supported on the carrier in an amount of 0.15 to 1.5% by weight calculated as V.
Claim 13
Dependent Claim
27 words
A process as defined in any one of claims 1 to 9 wherein the active component is a mixture of a vanadium compound and a titanium compound.
Claim 14
Dependent Claim
36 words
A process as defined in any one of claims 1 to 9 wherein the active component is a compound selected from the group consisting of sulfates and halides of iron, copper and antimony, tungstates and chromates.
Claim 15
Dependent Claim
22 words
A process as defined in any one of claims 1 to 9 wherein the coating has a thickness of 7 to 20μ.
Claim 16
Dependent Claim
20 words
A denitrating catalyst having a porous coating and produced by the process of any one of claims 1 to 9.
Claim 17
Dependent Claim
15 words
A denitrating catalyst having a porous coating and produced by the process of claim 10.
Claim 18
Dependent Claim
15 words
A denitrating catalyst having a porous coating and produced by the process of claim 11.
Claim 19
Dependent Claim
15 words
A denitrating catalyst having a porous coating and produced by the process of claim 12.
Claim 20
Dependent Claim
15 words
A denitrating catalyst having a porous coating and produced by the process of claim 13.
Claim 21
Dependent Claim
15 words
A denitrating catalyst having a porous coating and produced by the process of claim 14.
References Cited (Backward Citations)
US3956187A
Cited
US4040981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |