Patent US3855337A successfully refreshed from Google Patents.
US3855337A
Expired / Lapsed
US
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Method of removing and recovering aromatic hydrocarbons and water from a gas stream
Assignee: Black Sivalls and Bryson Inc
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Filing: 1973-10-17
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Granted: 1974-12-17
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Expires: 1993-10-17
Abstract
Abstract The present invention relates to a method of simultaneously removing and recovering aromatic hydrocarbons and water from a gas stream wherein the gas stream is intimately contacted with a stream of liquid absorbent so that the aromatic hydrocarbons and water contained therein are selectively absorbed and removed thereform. The resultant stream of water and aromatic hydrocarbon rich liquid absorbent is heated in a reboiler so that the absorbed components are vaporized and separated therefrom and the stream of liquid absorbent is reconcentrated. The separated aromatic hydrocarbon and water vapors are withdrawn and recovered and the reconcentrated liquid absorbent is recycled into intimate contact with the gas stream.
Inventors
- 👤 A Foral
- 👤 P Batdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:34
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1418; B01D53/1487
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
107 words
A METHOD OF REMOVING AND RECOVERING AROMATIC HYDROCARBONS AND WATER FROM A GAS STREAM WHICH COMPRISES THE STEPS OF: A. INTIMATELY CONTACTING SAID GAS STREAM WITH A STREAM OF LIQUID ABSORBENT SO THAT AROMATIC HYDROCARBONS AND WATER CONTAINED THEREIN ARE SELECTIVELY AND SIMULTANEOUSLY ABSORBED AND REMOVED THEREFROM; B. HEATING THE RESULTANT STREAM OF WATER AND AROMATIC HYDROCARBON RICH LIQUID ABSORBENT IN A REBOILER SO THAT THE ABSORBED AROMATIC HYDROCARBONS AND WATER ARE VAPORIZED AND SEPARATED THEREFROM AND THE STREAM OF LIQUID ABSORBENT IS RECONCENTRATED; C. WITHDRAWING THE SEPARATED AROMATIC HYDROCARBONS AND WATER VAPOR; D. RECYCLING THE RECONCENTRATED LIQUID ABSORBENT STREAM INTO INTIMATE CONTACT WITH SAID GAS STREAM;
Claim 2
Independent Claim
107 words
A METHOD OF REMOVING AND RECOVERING AROMATIC HYDROCARBONS AND WATER FROM A GAS STREAM WHICH COMPRISES THE STEPS OF: A. INTIMATELY CONTACTING SAID GAS STREAM WITH A STREAM OF LIQUID ABSORBENT SO THAT AROMATIC HYDROCARBONS AND WATER CONTAINED THEREIN ARE SELECTIVELY AND SIMULTANEOUSLY ABSORBED AND REMOVED THEREFROM; B. HEATING THE RESULTANT STREAM OF WATER AND AROMATIC HYDROCARBON RICH LIQUID ABSORBENT IN A REBOILER SO THAT THE ABSORBED AROMATIC HYDROCARBONS AND WATER ARE VAPORIZED AND SEPARATED THEREFROM AND THE STREAM OF LIQUID ABSORBENT IS RECONCENTRATED; C. WITHDRAWING THE SEPARATED AROMATIC HYDROCARBONS AND WATER VAPOR; D. RECYCLING THE RECONCENTRATED LIQUID ABSORBENT STREAM INTO INTIMATE CONTACT WITH SAID GAS STREAM;
Claim 3
Dependent Claim
62 words
The method of claim 1 which is further characterized to include the step of passing the stream of water and aromatic hydrocarbon-rich liquid absorbent formed in step (a) in heat exchange relationship with the reconcentrated stream of liquid absorbent formed in step (b) so that the stream of rich liquid absorbent is preheated and the stream of reconcentrated liquid absorbent is cooled.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein the gas stream is natural gas.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein the liquid absorbent is an aqueous solution of triethylene glycol.
Claim 6
Dependent Claim
16 words
The method of claim 3 wherein the liquid absorbent is an aqueous solution of tetraethylene glycol.
Claim 7
Independent Claim
150 words
A method of removing aromatic hydrocarbons and water from a gas stream which comprises the steps of: a. intimately contacting said gas stream with a stream of liquid absorbent so that said aromatic hydrocarbons and water contained therein are selectively and simultaneously absorbed and removed therefrom; b. heating the resultant stream of water and aromatic hydrocarbon-rich liquid absorbent in a reboiler so that the absorbed aromatic hydrocarbons and at least a portion of the absorbed water are vaporized and separated therefrom and the stream of liquid absorbent is partially reconcentrated; c. intimately contactng the stream of partially reconcentrated liquid absorbent with a stream of relatively dry gas so that absorbed water remaining therein is stripped and separated therefrom and the stream of liquid absorbent is reconcentrated; d. withdrawing the separated aromatic hydrocarbon and water vapors; and e. recylcing the reconcentrated liquid absorbent stream into intimate contact with said gas stream.
Claim 8
Independent Claim
150 words
A method of removing aromatic hydrocarbons and water from a gas stream which comprises the steps of: a. intimately contacting said gas stream with a stream of liquid absorbent so that said aromatic hydrocarbons and water contained therein are selectively and simultaneously absorbed and removed therefrom; b. heating the resultant stream of water and aromatic hydrocarbon-rich liquid absorbent in a reboiler so that the absorbed aromatic hydrocarbons and at least a portion of the absorbed water are vaporized and separated therefrom and the stream of liquid absorbent is partially reconcentrated; c. intimately contactng the stream of partially reconcentrated liquid absorbent with a stream of relatively dry gas so that absorbed water remaining therein is stripped and separated therefrom and the stream of liquid absorbent is reconcentrated; d. withdrawing the separated aromatic hydrocarbon and water vapors; and e. recylcing the reconcentrated liquid absorbent stream into intimate contact with said gas stream.
Claim 9
Dependent Claim
34 words
The method of claim 6 which is further characterized to include the steps of: condensing the withdrawn aromatic hydrocarbon and water vapors of step (d); and separating the condensed aromatic hydrocarbons from the water.
Claim 10
Dependent Claim
62 words
The method of claim 7 which is further characterized to include the step of passing the stream of water and artomatic hydrocarbon-rich liquid absorbent formed in step (a) in heat exchange relationship with the reconcentrated stream of liquid absorbent formed in step (c) so that the stream of rich liquid absorbent is preheated and the stream of reconcentrated liquid absorbent is cooled.
Claim 11
Dependent Claim
38 words
The method of claim 8 which is further characterized to include the step of heating the stream of relatively dry gas prior to intimately contacting the stream of partially reconcentrated liquid absorbent therewith in accordance with step (c).
Claim 12
Dependent Claim
12 words
The method of claim 8 wherein the gas stream is natural gas.
Claim 13
Dependent Claim
16 words
The method of claim 10 wherein the liquid absorbent is an aqueous solution of triethylene glycol.
Claim 14
Dependent Claim
16 words
The method of claim 10 wherein the liquid absorbent is an aqueous solution of tetraethylene glycol.
Claim 15
Independent Claim
244 words
A method of removing and recovering aromatic hydrocarbons and water from a gas stream which comprises the steps of: a. intimately contacting said gas stream with a first stream of liquid absorbent so that at least a portion of the aromatic hydrocarbons and water contained therein are selectively absorbed and removed therefrom; b. subsequently intimately contacting said gas stream with a second stream of liquid absorbent so that additional aromatic hydrocarbons and water contained therein are selectively absorbed and removed therefrom; c. combining the resultant first and second water and aromatic hydrocarbon-rich liquid absorbent streams; d. heating the resultant combined stream of water and aromatic hydrocarbon-rich liquid absorbent in a reboiler so that absorbed aromatic hydrocarbons and at least a portion of the absorbed water are vaporized and separated therefrom thereby partially reconcentrating said stream of liquid absorbent; e. dividing the partially reconcentrated stream of liquid absorbent formed in step (d) into first and second streams; f. recycling the first stream of liquid absorbent into intimate contact with said gas stream in accordance with step (a); g. intimately contacting the second stream of partially reconcentrated liquid absorbent with a stream of relatively dry gas so that absorbed water remaining therein is stripped and separated therefrom thereby further reconcentrating the second stream of liquid absorbent; h. withdrawing the separated aromatic hydrocarboN and water vapors; and i. recycling the second stream of liquid absorbent into intimate contact with said gas stream in accordance with step (b).
Claim 16
Independent Claim
244 words
A method of removing and recovering aromatic hydrocarbons and water from a gas stream which comprises the steps of: a. intimately contacting said gas stream with a first stream of liquid absorbent so that at least a portion of the aromatic hydrocarbons and water contained therein are selectively absorbed and removed therefrom; b. subsequently intimately contacting said gas stream with a second stream of liquid absorbent so that additional aromatic hydrocarbons and water contained therein are selectively absorbed and removed therefrom; c. combining the resultant first and second water and aromatic hydrocarbon-rich liquid absorbent streams; d. heating the resultant combined stream of water and aromatic hydrocarbon-rich liquid absorbent in a reboiler so that absorbed aromatic hydrocarbons and at least a portion of the absorbed water are vaporized and separated therefrom thereby partially reconcentrating said stream of liquid absorbent; e. dividing the partially reconcentrated stream of liquid absorbent formed in step (d) into first and second streams; f. recycling the first stream of liquid absorbent into intimate contact with said gas stream in accordance with step (a); g. intimately contacting the second stream of partially reconcentrated liquid absorbent with a stream of relatively dry gas so that absorbed water remaining therein is stripped and separated therefrom thereby further reconcentrating the second stream of liquid absorbent; h. withdrawing the separated aromatic hydrocarboN and water vapors; and i. recycling the second stream of liquid absorbent into intimate contact with said gas stream in accordance with step (b).
Claim 17
Dependent Claim
36 words
The method of claim 13 which is further characterized to include the step of cooling the first stream of liquid absorbent before recycling it into intimate contact with the gas stream in accordance with step (f).
Claim 18
Dependent Claim
31 words
The method of claim 14 which is further characterized to include the steps of: condensing the withdrawn aromatic hydrocarbon and water vapors; and separating the condensed aromatic hydrocarbons from the water.
Claim 19
Dependent Claim
63 words
The method of claim 15 which is further characterized to include the step of passing the second steam of liquid absorbent after being further reconcentrated in step (g) in heat exchange relationship with the aromatic hydrocarbon and water-rich stream of liquid absorbent formed in step (c) so that rich liquid absorbent is preheated and the reconcentrated second stream of liquid absorbent is cooled.
Claim 20
Dependent Claim
38 words
The method of claim 16 which is further characterized to include the step of heating the stream of relatively dry gas prior to intimately contacting the stream of partially reconcentrated liquid absorbent therewith in accordance with step (g).
Claim 21
Dependent Claim
12 words
The method of claim 16 wherein the gas stream is natural gas.
Claim 22
Dependent Claim
16 words
The method of claim 18 wherein the liquid absorbent is an aqueous solution of triethylene glycol.
Claim 23
Dependent Claim
16 words
The method of claim 19 wherein the liquid absorbent is an aqueous solution of tetraethylene glycol.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |