Patent US4532115A successfully refreshed from Google Patents.
US4532115A
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Method for removal of poisonous gases
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1984-02-17
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Granted: 1985-07-30
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Expires: 2004-02-17
Abstract
Abstract Hydrides of As, B, P, Sb or Se in a gas can easily be removed from the gas by contacting the gas with an adsorbent consisting of activated carbon containing: (1) copper oxide and (2) at least one of (a), (b) and (c) selected from the group consisting of (a) at least one alkali metal compound, and (b) at least one alkaline earth metal compound and (c) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb.
Inventors
- 👤 Hiroshi Nishino
- 👤 Toshio Aibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:47
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; B01D; B01D53/00; B01D53/02; B01D53/34; B01D53/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A method for removal of at least one hydride of As, B, P, Sb and Se from a gas containing said hydride and substantially not containing oxygen, which comprises contacting the gas with an activated carbon containing: (1) copper oxide in an amount of 0.1 mg-atom to 3.0 mg-atom as metal per g of activated carbon and (2) at least one of (a), (b) and (c) selected from the group consisting of (a) at least one alkali metal compound, (b) at least one alkaline earth metal compound and (c) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb, the total amount of (2) being 0.2 mg-atom to 4.0 mg-atom as metal per g of activated carbon.
Claim 2
Independent Claim
124 words
A method for removal of at least one hydride of As, B, P, Sb and Se from a gas containing said hydride and substantially not containing oxygen, which comprises contacting the gas with an activated carbon containing: (1) copper oxide in an amount of 0.1 mg-atom to 3.0 mg-atom as metal per g of activated carbon and (2) at least one of (a), (b) and (c) selected from the group consisting of (a) at least one alkali metal compound, (b) at least one alkaline earth metal compound and (c) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb, the total amount of (2) being 0.2 mg-atom to 4.0 mg-atom as metal per g of activated carbon.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) at least one alkali metal compound.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) at least one alkaline earth metal compound.
Claim 5
Dependent Claim
34 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb.
Claim 6
Dependent Claim
43 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) (a) at least one alkali metal compound and (c) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb.
Claim 7
Dependent Claim
51 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) (a) at least one alkali metal compound, (b) at least one alkaline earth metal compound and (c) at least one compound of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Cd and Pb.
Claim 8
Dependent Claim
28 words
A method as claimed in claim 1, wherein the activated carbon contains: (1) copper oxide and (2) (a) a compound of potassium and (c) a compound of chromium.
Claim 9
Dependent Claim
25 words
A method as claimed in claim 1, wherein the gas is contacted with the activated carbon at a temperature of not more than 200° C.
References Cited (Backward Citations)
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |