US5061377A
Expired / Lapsed
US
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Pipeline reactor and method
Assignee: CANADIAN LIQUID AIR LTD/AIR LIQUIDE CANADA LTEE 1155 SHERBROOKE ST WEST MONTREAL QUEBEC H3A 1H8 CANADA
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Filing: 1989-07-25
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Granted: 1991-10-29
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Expires: 2009-07-25
Abstract
Abstract A gas, for example, oxygen which has low solubility in water is efficiently dissolved and reacted with a substance in a flowing liquid medium by injecting the gas into the flowing liquid at spaced apart points such that a bubble flow condition is maintained and the injected gas is dissolved and substantially consumed by reaction with the substance in the interval between adjacent injection points; in this way the gas is injected at a point at which the aqueous liquid has maximum dissolving capacity and the number of injection points can be minimized; in another embodiment oxygen injection is controlled to maintain a desired oxygen:liquid ratio effective for efficient dissolving of the oxygen while maintaining the bubble flow condition, however, this requires more injection points.
Inventors
- 👤 Robert G. H. Lee
- 👤 Derek Hornsey
- 👤 Arthur S. Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:57
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/26; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/243; C02F3/20; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00162; B01J2219/00191; B01J2219/00193; B01J2219/00195; B01J2219/00198; B01J2219/00202; B01J2219/00245; B01J2219/00247; C02F2307/00; C02F2307/08; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
185 words
A method of reacting a low solubility gas with a substance in an aqueous medium comprising: flowing an aqueous liquid comprising said substance in said aqueous medium along a flow line effective to maximize the flow path of said liquid per unit length of effective travel, at a velocity effective to induce turbulent flow conditions in said flow line, maintaining the liquid in said flow path at a pressure of 2 to 20 atmospheres, introducing a low solubility gas under pressure and capable of reacting with said substance into said liquid in said flow path through a plurality of spaced apart injection ports, in the form of gas bubbles having a diameter of not more than 100μ, dissolving substantially all of the gas injected per unit volume of the flowing liquid in the interval of flow between adjacent injection ports such that the solubility capacity of the flowing liquid for the gas is maximized at each injection port, and maintaining a flow pattern of said liquid and gas such that a bubble flow condition is exhibited throughout said flow path and plug flow is avoided.
Claim 2
Independent Claim
185 words
A method of reacting a low solubility gas with a substance in an aqueous medium comprising: flowing an aqueous liquid comprising said substance in said aqueous medium along a flow line effective to maximize the flow path of said liquid per unit length of effective travel, at a velocity effective to induce turbulent flow conditions in said flow line, maintaining the liquid in said flow path at a pressure of 2 to 20 atmospheres, introducing a low solubility gas under pressure and capable of reacting with said substance into said liquid in said flow path through a plurality of spaced apart injection ports, in the form of gas bubbles having a diameter of not more than 100μ, dissolving substantially all of the gas injected per unit volume of the flowing liquid in the interval of flow between adjacent injection ports such that the solubility capacity of the flowing liquid for the gas is maximized at each injection port, and maintaining a flow pattern of said liquid and gas such that a bubble flow condition is exhibited throughout said flow path and plug flow is avoided.
Claim 3
Dependent Claim
39 words
A method according to claim 1, wherein said gas is injected in an amount per unit volume of the flowing liquid equivalent to a void fraction of less than 15% at a liquid velocity of at least 10 ft./sec.
Claim 4
Dependent Claim
27 words
A method according to claim 2, wherein said turbulent flow conditions correspond to a Reynolds number greater than 50,000, and the velocity is greater than 5 ft./sec.
Claim 5
Dependent Claim
20 words
A method according to claim 1, wherein said flow line is a sinuous flow line disposed in a vertical plane.
Claim 6
Dependent Claim
14 words
A method according to claim 1, wherein said aqueous liquid comprises a pulp liquor.
Claim 7
Dependent Claim
17 words
A method according to claim 5, wherein said bubbles have a diameter of 20 to 50 μ.
Claim 8
Dependent Claim
17 words
A method according to claim 1, wherein said aqueous liquid comprises an aqueous solution of said substance.
Claim 9
Dependent Claim
17 words
A method according to claim 1, wherein said aqueous liquid comprises an aqueous suspension of said substance.
Claim 10
Dependent Claim
12 words
A method according to claim 1, in which said gas comprises oxygen.
Claim 11
Dependent Claim
38 words
A method according to claim 1, wherein said aqueous liquid is a pulp liquor and said gas comprises oxygen, said gas being introduced at each injection port to establish a gas:liquid ratio, by volume, of 0.1 to 1.5:10.
Claim 12
Dependent Claim
24 words
A method according to claim 10, including a step of recovering reacted pulp liquor exiting from said flow path, substantially free of undissolved oxygen.
Claim 13
Dependent Claim
19 words
A method according to claim 11, carried out in the absence of venting of oxygen from said flow line.
Claim 14
Independent Claim
226 words
A method of reacting a low solubility gas with a substance in an aqueous medium comprising: flowing an aqueous liquid comprising said substance in said aqueous medium along a flow line effective to maximize the flow path of said liquid per unit length of effective travel, at a velocity effective to induce turbulent flow conditions in said flow line, maintaining the liquid in said flow path at a pressure of 2 to 20 atmospheres, introducing a low solubility gas under pressure and capable of reacting with said substance into said liquid in said flow path through a plurality of spaced apart injection ports, in the form of gas bubbles having a diameter of not more than 100 μ, said gas being introduced at said spaced apart injection ports in an amount to establish a gas:liquid ratio, by volume, of 0.1 to 1.5:10, in the flowing liquid, at said injection ports, allowing substantially all of said gas to react with said substance in said aqueous medium in the interval of flow between adjacent injection ports, maintaining a flow pattern of said liquid and gas such that a bubble flow condition is exhibited throughout said flow path and plug flow is avoided, and recovering the liquid exiting from said flow path substantially free of unreacted gas, said liquid flowing along said flowline in the absence of gas venting.
Claim 15
Independent Claim
226 words
A method of reacting a low solubility gas with a substance in an aqueous medium comprising: flowing an aqueous liquid comprising said substance in said aqueous medium along a flow line effective to maximize the flow path of said liquid per unit length of effective travel, at a velocity effective to induce turbulent flow conditions in said flow line, maintaining the liquid in said flow path at a pressure of 2 to 20 atmospheres, introducing a low solubility gas under pressure and capable of reacting with said substance into said liquid in said flow path through a plurality of spaced apart injection ports, in the form of gas bubbles having a diameter of not more than 100 μ, said gas being introduced at said spaced apart injection ports in an amount to establish a gas:liquid ratio, by volume, of 0.1 to 1.5:10, in the flowing liquid, at said injection ports, allowing substantially all of said gas to react with said substance in said aqueous medium in the interval of flow between adjacent injection ports, maintaining a flow pattern of said liquid and gas such that a bubble flow condition is exhibited throughout said flow path and plug flow is avoided, and recovering the liquid exiting from said flow path substantially free of unreacted gas, said liquid flowing along said flowline in the absence of gas venting.
Claim 16
Dependent Claim
19 words
A method according to claim 13, in which said liquid is a pulp liquor and said gas comprises oxygen.
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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) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |