US3349544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas drying process
Assignee: Dow Chemical Co
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Filing: 1966-01-28
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Granted: 1967-10-31
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Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 John L Arnold
- 👤 Roscoe L Pearce
- 👤 Herman G Scholten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D3/00; B01D3/34; B01D3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A METHOD OF DRYING A WATER-WET GAS BY CONTACTING SAID GAS WITH A LIQUID DRYING AGENT (A) SELECTED FROM THE GROUP CONSISTING OF A GLYCOL OF FROM 2 TO 8 CARBON ATOMS AND AN ALKANOLAMINE OF NO MORE THAN 6 CARBON ATOMS, WHEREIN (A) IS HEATED TO REMOVE WATER PRIOR TO REUSE A GAS-DRYING AGENT, THE IMPROVEMENT WHICH COMPRISES INTORDUCING AN ORGANIC WATER AZEOTROPING AGENT BENEATH THE SURFACE OF (A) WHEN THE AVERAGE TEMPERATURE OF (A) IS ABOVE THE VAPORIZATION TEMPERATURE OF THE AZEOTROPING AGENT AND BELOW THE THERMAL DECOMPOSITION TEMPERATURE OF (A) IN AN AMOUNT SUFFICIENT TO FROM A WATER AZEOTROPE WITH THE RESIDUAL WATER, SAID WATER AZEOTROPE HAVING A BOILING POINT NO GREATER THAN THE THERMAL DECOMPOSITION TEMPERATURE OF (A), THEN REMOVING SAID WATER AZEOTROPE FROM (A) SEPARATING SAID AZEOTROPING AGENT FROM THE WATER, AND REINTRODUCING SAID AZEOTROPING AGENT BENEATH THE SURFACE OF (A).
Claim 2
Dependent Claim
147 words
IN A METHOD OF DRYING A WATER-WET GAS BY CONTACTING SAID GAS WITH A LIQUID DRYING AGENT (A) SELECTED FROM THE GROUP CONSISTING OF A GLYCOL OF FROM 2 TO 8 CARBON ATOMS AND AN ALKANOLAMINE OF NO MORE THAN 6 CARBON ATOMS, WHEREIN (A) IS HEATED TO REMOVE WATER PRIOR TO REUSE A GAS-DRYING AGENT, THE IMPROVEMENT WHICH COMPRISES INTORDUCING AN ORGANIC WATER AZEOTROPING AGENT BENEATH THE SURFACE OF (A) WHEN THE AVERAGE TEMPERATURE OF (A) IS ABOVE THE VAPORIZATION TEMPERATURE OF THE AZEOTROPING AGENT AND BELOW THE THERMAL DECOMPOSITION TEMPERATURE OF (A) IN AN AMOUNT SUFFICIENT TO FROM A WATER AZEOTROPE WITH THE RESIDUAL WATER, SAID WATER AZEOTROPE HAVING A BOILING POINT NO GREATER THAN THE THERMAL DECOMPOSITION TEMPERATURE OF (A), THEN REMOVING SAID WATER AZEOTROPE FROM (A) SEPARATING SAID AZEOTROPING AGENT FROM THE WATER, AND REINTRODUCING SAID AZEOTROPING AGENT BENEATH THE SURFACE OF (A).
References Cited (Backward Citations)
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US2455803A
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US2552911A
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US2691624A
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US3105748A
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US3321890A
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |