US4405487A
Expired / Lapsed
US
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Combination moisture and hydrogen getter
Assignee: United States Department of Energy
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Filing: 1982-04-29
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Granted: 1983-09-20
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Expires: 2002-04-29
Abstract
Abstract A combination moisture and hydrogen getter comprises (a) a moisture getter comprising a readily oxidizable metal; and (b) a hydrogen getter comprising (i) a solid acetylenic compound and (ii) a hydrogenation catalyst. A method of scavenging moisture from a closed container uses the combination moisture and hydrogen getter to irreversibly chemically reduce the moisture and chemically bind the resultant hydrogen.
Inventors
- 👤 Larry A. Harrah
- 👤 Keith E. Mead
- 👤 Henry M. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/28; C; C01; C01B; C01B3/00; C01B3/50; C01B3/56; C01B3/58; C01B2203/00; C01B2203/04; C01B2203/0435; C01B2203/0465; C01B2203/0495
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
53 words
A combination moisture and hydrogen getter composition, comprising: (a) a moisture getter comprising a readily oxidizable metal and characterized by having standard oxidation potential relative to hydrogen in water within the range of about 0.049 to 1.86; and (b) a hydrogen getter comprising (i) a solid acetylenic compound and (ii) a hydrogenation catalyst.
Claim 2
Dependent Claim
53 words
A combination moisture and hydrogen getter composition, comprising: (a) a moisture getter comprising a readily oxidizable metal and characterized by having standard oxidation potential relative to hydrogen in water within the range of about 0.049 to 1.86; and (b) a hydrogen getter comprising (i) a solid acetylenic compound and (ii) a hydrogenation catalyst.
Claim 3
Dependent Claim
12 words
The composition of claim 1, wherein said metal is aluminum or zinc.
Claim 4
Dependent Claim
24 words
The composition of claim 1, wherein said metal is in the form of a powder having an average particle diameter of about 1-10 microns.
Claim 5
Dependent Claim
19 words
The composition of claim 1, wherein the solid acetylenic compound has a melting point of 80° C. or higher.
Claim 6
Dependent Claim
14 words
The composition of claim 4, wherein the solid acetylenic compound is a hydrocarbon diyne.
Claim 7
Dependent Claim
12 words
The composition of claim 5, wherein the solid acetylenic compound is 1,4-diphenylbutadiyne.
Claim 8
Dependent Claim
14 words
The composition of claim 1, wherein the hydrogenation catalyst is a noble metal catalyst.
Claim 9
Dependent Claim
11 words
The composition of claim 7, wherein the noble metal is palladium.
Claim 10
Dependent Claim
14 words
The composition of claim 7, wherein the catalyst is supported on a solid carrier.
Claim 11
Dependent Claim
12 words
The composition of claim 9, wherein the catalyst support is activated carbon.
Claim 12
Dependent Claim
14 words
The composition of claim 10, wherein the catalyst is 1-10% palladium on activated carbon.
Claim 13
Dependent Claim
19 words
The composition of claim 1, wherein the weight ratio of the solid acetylenic compound to the catalyst is 1:10-10:1.
Claim 14
Dependent Claim
12 words
The composition of claim 12, wherein said weight ratio is about 3:1.
Claim 15
Dependent Claim
22 words
The composition of claim 1, wherein the ratio of the hydrogen getter to the moisture getter is at least the stoichiometric ratio.
Claim 16
Dependent Claim
11 words
The composition of claim 14, wherein said ratio is about 1:1.
Claim 17
Dependent Claim
28 words
The composition of claim 11, wherein the hydrogen getter is a blend of about 75 weight percent 1,4-diphenylbutadiyne and about 25 weight percent 5% palladium on activated carbon.
Claim 18
Dependent Claim
19 words
The composition of claim 2, wherein the aluminum or zinc powder has a particle size of about 1-10 microns.
Claim 19
Dependent Claim
19 words
The composition of claim 17, wherein the aluminum or zinc powder is incorporated into an inert solid organic carrier.
Claim 20
Dependent Claim
11 words
The composition of claim 18, wherein said organic carrier is polyethylene.
Claim 21
Dependent Claim
28 words
The composition of claim 19, wherein the hydrogen getter is a blend of about 75 weight percent 1,4-diphenylbutadiyne and about 25 weight percent 5% palladium on activated carbon.
Claim 22
Dependent Claim
29 words
The composition of claim 20, wherein the weight ratio of the hydrogen getter to the moisture getter is about 0.36 g Al/g getter or about 1.36 g Zn/g getter.
Claim 23
Dependent Claim
20 words
The composition of claim 21, wherein the particles of moisture getter and hydrogen getter are pelleted together to produce pellets.
Claim 24
Independent Claim
50 words
A method of scavenging moisture in a closed container during storage or service, comprising introducing into the interior of said container an amount of the composition of any of claims 1, 2, 6, 11, 16 or 20 sufficient to chemically reduce said moisture and to chemically bind the resultant hydrogen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |