Patent US4483940A successfully refreshed from Google Patents.
US4483940A
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US
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Method for manufacture of honeycomb catalyst
Assignee: Nippon Shokubai Co Ltd
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Filing: 1982-12-20
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Granted: 1984-11-20
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Expires: 2002-12-20
Abstract
Abstract A method for the manufacture of a honeycomb carrier of enhanced resistance to thermal shocks, which method comprises applying a coat of water-soluble high-molecular organic compound to the surface of a ceramic honeycomb carrier of monolithic construction and subsequently depositing a catalyst component on the resultant coated carrier.
Inventors
- 👤 Tetsuji Ono
- 👤 Shoichi Ichihara
- 👤 Tomohisa Ohata
- 👤 Sadao Terui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:08
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/024; B01J37/0244; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J31/00; B01J31/02; B01J31/06; B01J31/068; B01J35/00; B01J35/50; B01J35/56; B01J35/57; B01J37/0215; B01J37/0219; B01J37/0242; B01J23/54; B01J23/56; B01J23/63; B01J23/70; B01J23/89; B01J23/8933; B01J23/894; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S502/00; Y10S502/523
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
49 words
A method for the manufacture of a honeycomb carrier of enhanced resistance to thermal shocks, which method comprises applying a coat of a water-soluble high-molecular organic compound to the surface of a ceramic honeycomb carrier of monolithic construction and subsequently depositing a catalyst component on the resultant coated carrier.
Claim 2
Independent Claim
49 words
A method for the manufacture of a honeycomb carrier of enhanced resistance to thermal shocks, which method comprises applying a coat of a water-soluble high-molecular organic compound to the surface of a ceramic honeycomb carrier of monolithic construction and subsequently depositing a catalyst component on the resultant coated carrier.
Claim 3
Dependent Claim
50 words
A method according to claim 1, wherein said application of the coat of a water-soluble high-molecular organic compound is effected by immersing said honeycomb carrier in an aqueous solution of said high-molecular organic compound and thereafter drying the drenched honeycomb carrier at a temperature of not more than 200° C.
Claim 4
Dependent Claim
39 words
A method according to claim 2, wherein said deposition of the catalyst component was effected by immersing said carrier coated with the high-molecular organic compound in an aqueous medium containing a catalyst composition and subsequently drying the drenched carrier.
Claim 5
Dependent Claim
20 words
A method according to claim 3, wherein said catalyst composition is a composition of a compound of catalytically active component.
Claim 6
Dependent Claim
26 words
A method according to claim 3, wherein said catalyst composition is a composition of a compound of catalytically active component with an active refractory metal compound.
Claim 7
Dependent Claim
95 words
A method according to claim 2, wherein said deposition of the catalyst component is effected by immersing a carrier coated with said high-molecular organic compound in either a solution of a soluble compound capable of forming an active refractory metal oxide or a dispersion having said metal oxide dispersed in an aqueous medium, drying the drenched carrier, calcining the dried carrier, and thereafter immersing the resultant carrier at least once in a solution containing at least one compound of catalytically active component selected from the group consisting of base metal compounds and noble metal compounds.
Claim 8
Dependent Claim
81 words
A method according to claim 2, wherein said deposition of the catalyst component is effected by immersing the carrier coated with the high-molecular organic compound at least once in a liquid obtained by adding at least one catalytically active component selected from the group consisting of base metal compounds and noble metal compounds to either a solution of a soluble compound capable of forming an active refractory metal oxide or a dispersion having said metal oxide dispersed in an aqueous medium.
Claim 9
Dependent Claim
81 words
A method according to claim 2, wherein said deposition of the catalyst component is effected by immersing a carrier coated with a water-soluble high molecular organic compound in a dispersion obtained by depositing at least one catalytically active component or a compound selected from the group consisting of base metals, noble metals and compounds thereof on an active refractory metal oxide, calcining and fixing the resultant composite thereby producing a catalyst composition, and dispersing said catalyst composition in an aqueous medium.
Claim 10
Dependent Claim
34 words
A method according to claim 2, wherein the amount of said coat of a water-soluble high-molecular organic compound is 0.02-1.0 parts by weight based on 100 parts by weight, as solids, of said carrier.
Claim 11
Dependent Claim
28 words
A method according to claim 2, wherein the concentration of said aqueous solution of a high-molecular organic compound is in the range of 0.5 to 50% by weight.
Claim 12
Dependent Claim
24 words
A method according to claim 2, wherein the viscosity of said aqueous solution of a high-molecular organic compound is not more than 500 cps.
Claim 13
Dependent Claim
29 words
A method according to claim 3, wherein an organic acid salt or inorganic acid salt of active refractory metal is present in said aqueous medium containing a catalyst composition.
Claim 14
Dependent Claim
24 words
A method according to claim 6, wherein an organic acid or inorganic acid is present in said dispersion of an active refractory metal oxide.
Claim 15
Dependent Claim
23 words
A method according to claim 6, wherein an organic acid or inorganic acid is present in said solution containing a catalytically active component.
Claim 16
Dependent Claim
59 words
A method according to claim 6, wherein a carrier composition obtained by immersing a carrier in at least one liquid selected from the group consisting of a dispersion of an active refractory metal oxide and a solution containing a catalytically active component is brought into contact with a gas containing a basic compound to neutralize a residual acid component.
Claim 17
Dependent Claim
38 words
A method according to claim 1, wherein said water-soluble high-molecular organic compound is selected from the group consisting of polyvinyl alcohol, polymers of acrylic acid and ammonium salts thereof and copolymers of maleic acid and ammonium salts thereof.
Claim 18
Dependent Claim
26 words
A method according to claim 16, wherein said water-soluble high-molecular orgainc compound is selected from the group consisting of polyvinyl alcohol, polyacrylic acid and polyammonium acrylate.
Claim 19
Dependent Claim
27 words
A method according to claim 5, wherein said active refractory metal oxide is selected from the group consisting of alumina, silica-alumina, magnesia, titania, zirconia, silica and silica-magnesia.
Claim 20
Dependent Claim
16 words
A method according to claim 18, wherein said active refractory metal oxide is alumina or zircona.
Claim 21
Dependent Claim
15 words
A method according to claim 19, wherein said active refractory metal oxide is active alumina.
Claim 22
Dependent Claim
27 words
A method according to claim 1, wherein said catalyst component is at least one noble metal selected from the group consisting of palladium, rhodium, ruthenium and iridium.
Claim 23
Dependent Claim
26 words
A method according to claim 21, wherein said catalyst component is at least one noble metal selected from the group consisting of platinum, palladium and rhodium.
Claim 24
Dependent Claim
12 words
A method according to claim 15, wherein said basic compound is ammonia.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |