US4556546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis tertiary amino alkyl derivatives as solvents for acid gas removal from gas streams
Assignee: Air Products and Chemicals Inc
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Filing: 1984-08-14
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Granted: 1985-12-03
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Expires: 2004-08-14
Abstract
Abstract A process is set forth for the selective removal of acid gases such as H 2 S, COS and CO 2 from a gas stream by contacting the stream with a bis tertiary amino alkyl solvent compound such as 4,4'-(oxydi-2,1-ethanediyl) bismorpholine. When used in an aqueous solution, the compounds catalytically hydrolyze COS to H 2 S and CO 2 .
Inventors
- 👤 William F. Burgoyne, Jr.
- 👤 Michael S. Chen
- 👤 Dale D. Dixon
- 👤 Thomas J. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; C07; C07C; C07C7/00; C07C7/11; C10K1/10; C10K1/12; C10K1/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A process for purifying gas streams of acid gas components, comprising H 2 S, COS and CO 2 , and catalytically hydrolyzing any COS to H 2 S and CO 2 , comprising contacting said gas stream in the presence of at least a minor amount of water with an acid gas absorbing solvent compound selected from the group having the formula: ##STR10## where x=1, 2 or 3 and where R 1 and R 2 are individually lower alkyl of C 1 to C 4 normal or branched hydrocarbons or R 1 and R 2 form a cyclic derivative having the structure: ##STR11## so as to absorb a predominant amount of such acid gas components from said gas stream.
Claim 2
Dependent Claim
119 words
A process for purifying gas streams of acid gas components, comprising H 2 S, COS and CO 2 , and catalytically hydrolyzing any COS to H 2 S and CO 2 , comprising contacting said gas stream in the presence of at least a minor amount of water with an acid gas absorbing solvent compound selected from the group having the formula: ##STR10## where x=1, 2 or 3 and where R 1 and R 2 are individually lower alkyl of C 1 to C 4 normal or branched hydrocarbons or R 1 and R 2 form a cyclic derivative having the structure: ##STR11## so as to absorb a predominant amount of such acid gas components from said gas stream.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the compound is in solution with another solvent or vehicle and is in a concentration of 5 to less than 100 wt% of the other solvent.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the compound is in a concentration of 30 to 90 wt% based on water.
Claim 5
Dependent Claim
43 words
The process of claim 1 wherein the acid gas containing absorbing solvent compound is separated from the gas stream and regenerated by a process selected from the group comprising; heating, reducing pressure or stripping with an inert gas or combinations of these processes.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein the regenerated absorbing solvent compound is recycled to contact the acid gas containing gas stream.
Claim 7
Dependent Claim
32 words
The process of claim 1 wherein the gas stream is contacted with the adsorbing solvent compound at a temperature of -10° to 200° C. and a pressure of 15 to 2000 psia.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein the compound is 4-4'(oxydi-2,1-ethanediyl)bismorpholine.
Claim 9
Dependent Claim
16 words
The process of claim 7 wherein the solvent has a viscosity reducing effective amount of 2-[2-(4-morpholinyl)ethoxy]ethanol.
Claim 10
Dependent Claim
22 words
The process of claim 8 wherein the viscosity reductant is in a concentration of 5 to 40 wt% of the solvent compound.
Claim 11
Dependent Claim
80 words
A process for purifying gas streams of acid gas components, comprising H 2 S, COS and CO 2 , and catalytically hydrolyzing any COS to H 2 S and CO 2 comprising contacting said gas stream in the presence of at least a minor amount of water with an acid gas absorbing solvent compound selected from the group of 4,4'-(oxydi-2,1-ethenediyl)bismorpholine, 2-[2-(4-morpholinyl)ethoxy]ethanol, N,N-dimethyl-4-morpholineethanamine, and N,N-dimethyl-2-[2-(4-morpholinyl)ethoxy]ethanamine so as to absorb a predominant amount of such acid gas components from said gas stream.
Claim 12
Dependent Claim
80 words
A process for purifying gas streams of acid gas components, comprising H 2 S, COS and CO 2 , and catalytically hydrolyzing any COS to H 2 S and CO 2 comprising contacting said gas stream in the presence of at least a minor amount of water with an acid gas absorbing solvent compound selected from the group of 4,4'-(oxydi-2,1-ethenediyl)bismorpholine, 2-[2-(4-morpholinyl)ethoxy]ethanol, N,N-dimethyl-4-morpholineethanamine, and N,N-dimethyl-2-[2-(4-morpholinyl)ethoxy]ethanamine so as to absorb a predominant amount of such acid gas components from said gas stream.
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |