Patent US4471138A successfully refreshed from Google Patents.
US4471138A
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Severely sterically hindered secondary aminoether alcohols
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-12-27
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Granted: 1984-09-11
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Expires: 2002-12-27
Abstract
Abstract A novel class of severely sterically hindered secondary aminoether alcohols of the general formula: <IMAGE> are prepared wherein R1 and R2 are each selected from the group consisting of alkyl and hydroxylalkyl radicals R3, R4, R5 and R6 are each selected from the group consisting of hydrogen, alkyl and hydroxyalkyl radicals, with the proviso that at least one of R4 or R5 bonded to the carbon atom directly bonded to the nitrogen atom is an alkyl or hydroxyalkyl radical when R3 is hydrogen, x and y are each positive integers ranging from 2-4 and z is a positive integer ranging from 1-4. The compounds are useful in the selective removal of H2S from mixtures containing H2S and CO2.
Inventors
- 👤 Eugene L. Stogryn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:10
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A secondary aminoether alcohol of the general formula: ##STR5## wherein R 1 and R 2 are each independently selected from the group consisting of alkyl or hydroxyalkyl radicals having 1-4 carbon atoms, R 3 , R 4 , R 5 and R 6 are each independently selected from the group consisting of hydrogen, alkyl or hydroxyalkyl radicals having 1-4 carbon atoms, with the proviso that at least one of R 4 or R 5 bonded to the carbon atom directly bonded to the nitrogen atom is an alkyl or hydroxyalkyl radical having 1-4 carbon atoms when R 3 is hydrogen, x and y are each positive integers ranging from 2-4, and z is a positive integer ranging from 1-4.
Claim 2
Dependent Claim
119 words
A secondary aminoether alcohol of the general formula: ##STR5## wherein R 1 and R 2 are each independently selected from the group consisting of alkyl or hydroxyalkyl radicals having 1-4 carbon atoms, R 3 , R 4 , R 5 and R 6 are each independently selected from the group consisting of hydrogen, alkyl or hydroxyalkyl radicals having 1-4 carbon atoms, with the proviso that at least one of R 4 or R 5 bonded to the carbon atom directly bonded to the nitrogen atom is an alkyl or hydroxyalkyl radical having 1-4 carbon atoms when R 3 is hydrogen, x and y are each positive integers ranging from 2-4, and z is a positive integer ranging from 1-4.
Claim 3
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR6##
Claim 4
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR6##
Claim 5
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR7##
Claim 6
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR7##
Claim 7
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR8##
Claim 8
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR8##
Claim 9
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR9##
Claim 10
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR9##
Claim 11
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR10##
Claim 12
Dependent Claim
8 words
A secondary aminoether alcohol of the formula: ##STR10##
Claim 13
Dependent Claim
14 words
A blend of the secondary aminoether alcohol of claim 1 and another amino compound.
Claim 14
Dependent Claim
12 words
The blend of claim 7 wherein the other amino compound is methyldiethanolamine.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |