US3324627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of gases
Assignee: GEA Group AG
•
Filing: 1962-03-14
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Granted: 1967-06-13
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Expires: 1982-03-14
Abstract
No abstract record available.
Inventors
- 👤 Kohrt Hans-Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:11
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/14; B01D53/1406; B01D53/1456; B01D53/1462; C; C10; C10K; C10K1/00; C10K1/08; C10K1/085; C10K1/16; C10K1/165; Y; Y02; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A PROCESS OF PURIFYING AN IMPURE GAS SELECTED FROM THE GROUP CONSISTING OF A FUEL GAS AND A GASEOUS PRECURSOR OF A FUEL GAS, SAID IMPURE GAS HAVING IMPURITIES CONSISTING ESSENTIALLY OF HYDROGEN SULFIED, ORGANIC SULFUR COMPOUNDS, CARBON DIOXIDE, C5-C8 HYDROCARBONS, AND WATER VAPOR, SAID PROCESS COMPRISING THE STEP OF WASHING THE IMPURE GAS UNDER PRESSURE WITH AN ABSORBENT SELECTED FROM THE GROUP CONSISTING OF N-ALKYLATED PIPERDONES AND N-ALKYLATED PYRROLIDONES, TO REMOVE AT LEAST ONE OF SAID IMPURITIES, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE ABSORBENT 1-50% BY VOLUME OF A LOW-BOILING POLAR, ORGANIC, WATER-SOLUBLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, AND ACETONE AND THEREBY DECREASING THE VISCOSITY OF SAID ABSORBENT, LOWERING THE BOILING TEMPERATURE OF SAID ABSORBENT, AND INCREASING THE DISSOLVING POWER OF SAID ABSORBENT.
Claim 2
Dependent Claim
130 words
IN A PROCESS OF PURIFYING AN IMPURE GAS SELECTED FROM THE GROUP CONSISTING OF A FUEL GAS AND A GASEOUS PRECURSOR OF A FUEL GAS, SAID IMPURE GAS HAVING IMPURITIES CONSISTING ESSENTIALLY OF HYDROGEN SULFIED, ORGANIC SULFUR COMPOUNDS, CARBON DIOXIDE, C5-C8 HYDROCARBONS, AND WATER VAPOR, SAID PROCESS COMPRISING THE STEP OF WASHING THE IMPURE GAS UNDER PRESSURE WITH AN ABSORBENT SELECTED FROM THE GROUP CONSISTING OF N-ALKYLATED PIPERDONES AND N-ALKYLATED PYRROLIDONES, TO REMOVE AT LEAST ONE OF SAID IMPURITIES, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE ABSORBENT 1-50% BY VOLUME OF A LOW-BOILING POLAR, ORGANIC, WATER-SOLUBLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, AND ACETONE AND THEREBY DECREASING THE VISCOSITY OF SAID ABSORBENT, LOWERING THE BOILING TEMPERATURE OF SAID ABSORBENT, AND INCREASING THE DISSOLVING POWER OF SAID ABSORBENT.
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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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |