Patent US2846443A successfully refreshed from Google Patents.
US2846443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process apt to improve the recovery of selective solvents, and particularly of solvents destined to the separation of acetylene from gases containing same
Assignee: Edison SpA
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Filing: 1956-05-31
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Granted: 1958-08-05
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Malusa Giorgio
- 👤 Rossoni Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:18
CPC Classifications
C; C07; C07D; C07D315/00; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A PROCESS FOR IMPROVING THE RECOVERY OF SELECTIVE SOLVENTS, EMPOLYED IN THE SEPARATION OF ACETYLENE FROM GASES CONTAINING SAME, WHICH INCLUDES THE STEP OF: PRIOR TO FLOCCULATION ADDING TO SAID SOLVENTS SMALL QUANTITES OF ORGANIC COMPOUNDS ONLY SLIGHTLY SOLUBLE IN WATER AND SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND CHLORINATED HYDROCARBONS TO THEREBY AID IN THE FLOCCULATION OF THE COLLOIDAL SUSPENSION OF THE POLYMERS DERIVED FROM THE ACETYLENE AND CONTAINED IN SAID SOLVENTS.
Claim 2
Dependent Claim
75 words
A PROCESS FOR IMPROVING THE RECOVERY OF SELECTIVE SOLVENTS, EMPOLYED IN THE SEPARATION OF ACETYLENE FROM GASES CONTAINING SAME, WHICH INCLUDES THE STEP OF: PRIOR TO FLOCCULATION ADDING TO SAID SOLVENTS SMALL QUANTITES OF ORGANIC COMPOUNDS ONLY SLIGHTLY SOLUBLE IN WATER AND SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND CHLORINATED HYDROCARBONS TO THEREBY AID IN THE FLOCCULATION OF THE COLLOIDAL SUSPENSION OF THE POLYMERS DERIVED FROM THE ACETYLENE AND CONTAINED IN SAID SOLVENTS.
Claim 3
Independent Claim
65 words
A METHOD OF IMPROVING THE RECOVERY OF SELECTIVE SOLVENTS EMPLOYED IN THE SEPARATION OF ACETYLENE FROM GASES CONTAINING SAME, SAID SOLVENTS BEING SELECTED FROM THE GROUP CONSISTING OF GAMMA-BUTYROLACTONE, N-METHYL-PYRROLIDONE AND DI-METHYL-FORMOAMIDE, WHICH INCLUDES THE STEP OF: PRIOR TO FLOCCULATION, ADDING TO THE SOLUTION CONTAINING SAID SOLVENTS SMALL QUANTITES OF ORGANIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF TOLUENE, BENZENE, HOMOLOGUES OF BENZENE AND TRICHLOROETHYLENE.
Claim 4
Independent Claim
65 words
A METHOD OF IMPROVING THE RECOVERY OF SELECTIVE SOLVENTS EMPLOYED IN THE SEPARATION OF ACETYLENE FROM GASES CONTAINING SAME, SAID SOLVENTS BEING SELECTED FROM THE GROUP CONSISTING OF GAMMA-BUTYROLACTONE, N-METHYL-PYRROLIDONE AND DI-METHYL-FORMOAMIDE, WHICH INCLUDES THE STEP OF: PRIOR TO FLOCCULATION, ADDING TO THE SOLUTION CONTAINING SAID SOLVENTS SMALL QUANTITES OF ORGANIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF TOLUENE, BENZENE, HOMOLOGUES OF BENZENE AND TRICHLOROETHYLENE.
References Cited (Backward Citations)
US2738860A
Cited
US2741332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |