Patent US4154584A successfully refreshed from Google Patents.
US4154584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cooling gases containing naphthalene, tar and solids
Assignee: Dr C Otto and Co GmbH
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Filing: 1977-07-15
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Granted: 1979-05-15
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Expires: 1997-07-15
Abstract
Abstract Hot gases containing naphthalene and tar together with the possible inclusion of solids are contacted in a spray tower with water to cool the gases. A naphthalene extraction agent, such as tar, is vigorously admixed with water withdrawn from the spray tower. The admixture is separated in a settling tank from which water is obtained and recycled to the spray tower for cooling further quantities of gases. Solids, gas condensate and tar enriched with naphthalene are separately removed from the settling tank.
Inventors
- 👤 Hansjurgen Ullrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:18
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/04; C10K1/001; C10K1/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
191 words
A method for cooling gases containing naphthalene and tar together with the possible inclusion of solids, said method including the steps of: contacting the gases in a direct condenser with a cooling liquid to cool the gases and to remove naphthalene from the gases, withdrawing cooling liquid from the direct condenser into a separate mixer after contact with the gases, vigorously admixing the withdrawn cooling liquid containing naphthalene with a naphthalene extraction agent unenriched with naphthalene introduced into said mixer having a driven agitator to extract naphthalene from the cooling liquid, feeding the vigorously admixed naphthalene extraction agent and cooling liquid from the mixer into a settling tank, separating the cooling liquid in said settling tank by settling out of the naphthalene extraction agent while enriched with the naphthalene extracted from the cooling liquid, withdrawing cooling liquid from the upper part of the settling tank, withdrawing the naphthalene extraction agent from the lower part of the settling tank, removing solids from the settling tank, and returning the withdrawn cooling liquid obtained by said step of separating into said direct condenser to cool further quantities of gases by said step of contacting.
Claim 2
Independent Claim
191 words
A method for cooling gases containing naphthalene and tar together with the possible inclusion of solids, said method including the steps of: contacting the gases in a direct condenser with a cooling liquid to cool the gases and to remove naphthalene from the gases, withdrawing cooling liquid from the direct condenser into a separate mixer after contact with the gases, vigorously admixing the withdrawn cooling liquid containing naphthalene with a naphthalene extraction agent unenriched with naphthalene introduced into said mixer having a driven agitator to extract naphthalene from the cooling liquid, feeding the vigorously admixed naphthalene extraction agent and cooling liquid from the mixer into a settling tank, separating the cooling liquid in said settling tank by settling out of the naphthalene extraction agent while enriched with the naphthalene extracted from the cooling liquid, withdrawing cooling liquid from the upper part of the settling tank, withdrawing the naphthalene extraction agent from the lower part of the settling tank, removing solids from the settling tank, and returning the withdrawn cooling liquid obtained by said step of separating into said direct condenser to cool further quantities of gases by said step of contacting.
Claim 3
Dependent Claim
14 words
The method according to claim 1 wherein said direct condenser is a spray tower.
Claim 4
Dependent Claim
37 words
The method according to claim 1 including the further step of withdrawing the naphthalene extraction agent enriched with naphthalene from said settling tank, withdrawing solids from said settling tank, and withdrawing gas condensate from said settling tank.
Claim 5
Dependent Claim
19 words
The method according to claim 1 wherein said step of returning the cooling fluid includes cooling the cooling fluid.
Claim 6
Dependent Claim
20 words
The method according to claim 1 wherein said circulating cooling liquid is water, and said naphthalene extraction agent is tar.
Claim 7
Dependent Claim
26 words
The method according to claim 5 including the furher step of feeding tar obtained from a subsidiary tar recovery separator for said step of vigorously admixing.
Claim 8
Dependent Claim
16 words
The method according to claim 6 wherein said gases include distillation gases from a coke oven.
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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |