US2921648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the recovery of acetylene from gas mixtures
Assignee: Nitroglycerin AB
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Filing: 1956-03-20
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Granted: 1960-01-19
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Expires: 1976-03-20
Abstract
No abstract record available.
Inventors
- 👤 Wetterholm Gustav Allan
- 👤 Fossan Kare Ragnvald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A NOVEL P ROCESS FOR THE SELECTIVE SEPARATION AND RECOVERY OF AT LEAST ABOUT 99% PURE ACETYLENE FROM GAS MIXTURES PRODUCED BY THE HIGH TEMPERATURE CONVERSION OF HYDROCARBONS, SAID GAS MIXTURES CONTAINING BETWEEN ABOUT 5 AND 20% OF ACETYLENE WITH COMPRISES: (A) PASSING THE SAID GAS MIXTURE INTO INTIMATE CONTACT WITH A LOW-MOLECULAR WEIGHT DIALKYL SULFOXIDE IN THE LIQUID STATE, THE ALKYL GROUPS OF SAID DIALKYL SULFOXIDE BEING SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL AND PROPYL, (B) CONTACTING SAID SULFOXIDE AND SAID GAS MIXTURE FOR A SUFFICIENT TIME TO ABSORB A QUANTITY OF ACETYLENE GAS IN SAID SULFOXIDE, (C) SEPARATING THE RESIDUAL GAS MIXTURE FROM THE LIQUID SULFOXIDE CONTAINING ABSORBED ACETYLENE, (D) COOLING THE LIQUID SULFOXIDE CONTAINING ABSORBED ACETYLENE UNTIL THE SULFOXIDE CRYSTALLIZES AND RELEASES ABSORBED ACETYLENE GASES, AND (E) RECOVERING THE RELEASED ACETYLENE GASES.
Claim 2
Dependent Claim
137 words
A NOVEL P ROCESS FOR THE SELECTIVE SEPARATION AND RECOVERY OF AT LEAST ABOUT 99% PURE ACETYLENE FROM GAS MIXTURES PRODUCED BY THE HIGH TEMPERATURE CONVERSION OF HYDROCARBONS, SAID GAS MIXTURES CONTAINING BETWEEN ABOUT 5 AND 20% OF ACETYLENE WITH COMPRISES: (A) PASSING THE SAID GAS MIXTURE INTO INTIMATE CONTACT WITH A LOW-MOLECULAR WEIGHT DIALKYL SULFOXIDE IN THE LIQUID STATE, THE ALKYL GROUPS OF SAID DIALKYL SULFOXIDE BEING SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL AND PROPYL, (B) CONTACTING SAID SULFOXIDE AND SAID GAS MIXTURE FOR A SUFFICIENT TIME TO ABSORB A QUANTITY OF ACETYLENE GAS IN SAID SULFOXIDE, (C) SEPARATING THE RESIDUAL GAS MIXTURE FROM THE LIQUID SULFOXIDE CONTAINING ABSORBED ACETYLENE, (D) COOLING THE LIQUID SULFOXIDE CONTAINING ABSORBED ACETYLENE UNTIL THE SULFOXIDE CRYSTALLIZES AND RELEASES ABSORBED ACETYLENE GASES, AND (E) RECOVERING THE RELEASED ACETYLENE GASES.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |