Patent US4865822A successfully refreshed from Google Patents.
US4865822A
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Process for purifying hydrogen selenide and hydrogen telluride, to remove moisture and oxidant impurities therefrom
Assignee: Entegris Inc
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Filing: 1988-10-11
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Granted: 1989-09-12
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Expires: 2008-10-11
Abstract
Abstract A scavenger, having utility for purifying a mixture comprising: (i) a primary component selected from one or more members of the group consisting of hydrogen selenide and hydrogen telluride, and (ii) impurities selected from one or more members of the group consisting of moisture and oxidants, comprising: (a) a support; and (b) associated with said support, one or more members of the group consisting of: (I) precusor compounds of the formula R 3-x AlH x , wherein x is 0 or 1, and R is a hydrocarbon radical containing from 1 to 12 carbon atoms; and (II) aluminum chalconides of the formula Al 2 M 3 , wherein M is selenium or tellurium. Illustrative supports useful in such scavenger include aluminosilicates, alumina, silica, carbon, and macroreticulate polymers. A process and apparatus are disclosed for purifying hyhrogen selenide and/or hydrogen telluride, to remove moisture and/or oxidant impurities therefrom, in which a bed of the scavenger is employed.
Inventors
- 👤 Glenn M. Tom
- 👤 Duncan W. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3265; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/321
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
A process for purifying a gaseous mixture comprising: (i) a primary component selected from one or more members of the group consisting of hydrogen selenide and hydrogen telluride, and (ii) impurities selected from one or more members of the group consisting of moisture and oxidants, to remove said impurities therefrom, said process comprising: contacting the mixture with a scavenger including a support having associated therewith an active scavenging component selected from one or more members of the group consisting of: (a) R 3-x AlH x , wherein x is 0 or 1, and R is an alkyl hydrocarbon radical containing from 1 to 12 carbon atoms; and (b) an aluminum chalconide of the corresponding primary component of the gaseous mixture.
Claim 2
Dependent Claim
120 words
A process for purifying a gaseous mixture comprising: (i) a primary component selected from one or more members of the group consisting of hydrogen selenide and hydrogen telluride, and (ii) impurities selected from one or more members of the group consisting of moisture and oxidants, to remove said impurities therefrom, said process comprising: contacting the mixture with a scavenger including a support having associated therewith an active scavenging component selected from one or more members of the group consisting of: (a) R 3-x AlH x , wherein x is 0 or 1, and R is an alkyl hydrocarbon radical containing from 1 to 12 carbon atoms; and (b) an aluminum chalconide of the corresponding primary component of the gaseous mixture.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the primary component of the gaseous mixture is hydrogen selenide, and the active scavenging compound is aluminum selenide.
Claim 4
Dependent Claim
24 words
A process according to claim 1, wherein the primary component of the gaseous mixture is hydrogen telluride, and the active scavenging component aluminum telluride.
Claim 5
Dependent Claim
11 words
A process according to claim 1, wherein said impurities comprise water.
Claim 6
Dependent Claim
23 words
A process according to claim 1, wherein said support is selected from the group consisting of: aluminosilicates; alumina; silica; carbon; and macroreticulate polymers.
Claim 7
Dependent Claim
11 words
A process according to claim 1, wherein said support is alumina.
Claim 8
Dependent Claim
13 words
A process according to claim 1, wherein said support is a macroreticulate polymer.
Claim 9
Dependent Claim
46 words
A process according to claim 1, wherein the active scavenging component precursor associated with the support is R 3-x AlH x , and wherein said precursor is converted to its corresponding aluminum chalconide by reaction with the primary component of the gaseous mixture to be purified.
Claim 10
Dependent Claim
28 words
A process according to claim 1, wherein said support has a surface area in the range from about 50 to about 1,000 square meters per gram of support.
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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |