US4797227A
Expired / Lapsed
US
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Process and composition for purifying hydrogen selenide and hydrogen telluride, to remove moisture and oxidant impurities therefrom
Assignee: Entegris Inc
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Filing: 1987-07-31
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Granted: 1989-01-10
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Expires: 2007-07-31
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) precursor 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 hydrogen 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 19:42
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J20/08; B01J20/0203; B01J20/0248; B01J20/0262; B01J20/20; B01J20/22; B01J20/26; B01J20/261; B01J20/264; B01J20/265; B01J20/267; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/28016; B01J20/28054; B01J20/28057; B01J20/28078; B01J20/28095; B01J20/28097; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/321; B01J20/3231; B01J20/3234; B01J20/3236; B01J20/3291; B01J20/3297; B01J2220/00; B01J2220/50; B01J2220/56
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
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, said scavenger comprising (a) a support, and (b) associated with said support, one or more members of the group consisting of 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.
Claim 2
Dependent Claim
95 words
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, said scavenger comprising (a) a support, and (b) associated with said support, one or more members of the group consisting of 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.
Claim 3
Dependent Claim
23 words
A scavenger according to claim 1, wherein said support is selected from the group consisting of aluminosilicates, alumina, silica, carbon, and macroreticulate polymers.
Claim 4
Dependent Claim
11 words
A scavenger according to claim 1, wherein said support is alumina.
Claim 5
Dependent Claim
13 words
A scavenger according to claim 1, wherein said support is a macroreticulate polymer.
Claim 6
Dependent Claim
29 words
A scavenger according to claim 4, wherein said macroreticulate polymer is formed of monomers selected from the group consisting of styrene, vinyltoluene, vinylisopropylbenzene, vinylnaphthalene, alpha-methylstyrene, beta-methylstyrene, and mixtures thereof.
Claim 7
Dependent Claim
28 words
A scavenger according to claim 5, wherein the polymer has been polymerized in the presence of a cross-linking agent selected from the group consisting of divinylbenzene and divinylnaphthalene.
Claim 8
Dependent Claim
11 words
A scavenger according to claim 1, wherein said support is poly(styrene-divinylbenzene).
Claim 9
Dependent Claim
58 words
A scavenger according to claim 1, wherein the support has a surface area in the range from about 50 to about 1,000 square meters per gram of support, and a significant porosity from pores of a diameter in the range from about 3 to about 200 Angstroms, and is thermally stable at least up to about 250° Centigrade.
Claim 10
Dependent Claim
27 words
A scavenger according to claim 1, having a water removal capacity of from about 0.5 to about 20 liters gaseous water per liter of a bed thereof.
Claim 11
Dependent Claim
71 words
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, said scavenger comprising (a) a macroreticulate polymer support, and (b) associated with the support, but not covalently bonded thereto, aluminum chalconides of tellurium and/or selenium.
Claim 12
Dependent Claim
71 words
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, said scavenger comprising (a) a macroreticulate polymer support, and (b) associated with the support, but not covalently bonded thereto, aluminum chalconides of tellurium and/or selenium.
Claim 13
Dependent Claim
29 words
A scavenger according to claim 10, wherein said macroreticulate polymer is formed of monomers selected from the group consisting of styrene, vinyltoluene, vinylisopropylbenzene, vinylnaphthalene, alpha-methylstyrene, beta-methylstyrene, and mixtures thereof.
Claim 14
Dependent Claim
29 words
A scavenger according to claim 11, wherein the macroreticulate polymer has been polymerized in the presence of a cross-linking agent selected from the group consisting of divinylbenzene and divinylnaphthalene.
Claim 15
Dependent Claim
11 words
A scavenger according to claim 10, wherein said support is poly(styrene-divinylbenzene).
Claim 16
Dependent Claim
27 words
A scavenger according to claim 10, having a water removal capacity of from about 0.5 to about 20 liters gaseous water per liter of a bed thereof.
Claim 17
Dependent Claim
35 words
A scavenger according to claim 10, wherein the concentration of said aluminum chalconides of tellurium and/or selenium is from about 0.5 to about 50 miligrams of said aluminum chalconides per gram of macroreticulate polymer support.
Claim 18
Dependent Claim
36 words
A scavenger according to claim 10, wherein the concentration of said aluminum chalconides of tellurium and/or selenium is from about 5 to about 25 miligrams of a said aluminum chalconides per gram of macroreticulate polymer support.
Claim 19
Dependent Claim
29 words
A scavenger according to claim 10, wherein the macroreticulate polymer support is in the form of a bead having a diameter of from about 0.3 to about 1.0 mm.
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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |