US4530704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective absorption of SO2 from gases containing the same
Assignee: MORECO ENERGY Inc AN IL CORP
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Filing: 1983-12-19
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Granted: 1985-07-23
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Expires: 2003-12-19
Abstract
Abstract There is disclosed a process for selectively removing and recovering sulfur dioxide from a gas stream containing the same by contacting the gas with an absorbent (an aqueous solution of a piperazine, piperazinone or a morpholinone) and thermally regenerating the absorbent (i.e. releasing the sulfur dioxide from the absorbent) for reuse in the contacting step.
Inventors
- 👤 Mark B. Jones
- 👤 Allan E. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; B01D53/1425; B01D53/1456; B01D53/1481
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
A method for removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR2## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms, and recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution.
Claim 2
Independent Claim
89 words
A method for removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR2## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms, and recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution.
Claim 3
Independent Claim
93 words
A method for removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR3## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms, and recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution.
Claim 4
Independent Claim
93 words
A method for removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR3## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms, and recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution.
Claim 5
Independent Claim
119 words
A method for removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR4## wherein X represents the oxygen or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution, and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 6
Independent Claim
119 words
A method for removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR4## wherein X represents the oxygen or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution, and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 7
Independent Claim
123 words
A method for removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR5## wherein X represents the oxygen or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution, and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 8
Independent Claim
123 words
A method for removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR5## wherein X represents the oxygen or ═NR', Y represents oxygen or H 2 , and each of R represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution, and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 9
Independent Claim
123 words
A method for continuously removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR6## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R and R' represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering from the gas, substantially free of said sulfur dioxide, from said aqueous solution and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 10
Independent Claim
123 words
A method for continuously removing sulfur dioxide from a gas stream containing the same which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR6## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R and R' represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering from the gas, substantially free of said sulfur dioxide, from said aqueous solution and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 11
Independent Claim
126 words
A method for continuously removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR7## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R and R' represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 12
Independent Claim
126 words
A method for continuously removing sulfur dioxide selectively from a gas stream containing the same and carbon dioxide which comprises contacting the sulfur dioxide containing gas with an aqueous solution of a compound selected from the group consisting of a piperazinone and/or morpholinone having the following general formula ##STR7## wherein X represents the oxygen, or ═NR', Y represents oxygen or H 2 , and each of R and R' represent an independently selected lower alkyl moiety of 1 to 5 carbon atoms or hydrogen, recovering the gas, substantially free of said sulfur dioxide, from said aqueous solution and thereafter regenerating said aqueous solution to free it from the sulfur dioxide thereby enabling its reuse as an absorbent when contacted with a gas stream containing sulfur dioxide.
Claim 13
Dependent Claim
10 words
In the method of any of claims 1-6 wherein N,N-dimethylpiperazinone.
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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |