§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4865822A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for purifying hydrogen selenide and hydrogen telluride, to remove moisture and oxidant impurities therefrom

Assignee: Entegris Inc
•
Filing: 1988-10-11
•
Granted: 1989-09-12
•
Expires: 2008-10-11
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

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 19:41
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)

US4115440A Cited
US4124633A Cited
US4603148A Cited
US4659552A Cited

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag