Patent US2570217A successfully refreshed from Google Patents.
US2570217A
Expired / Lapsed
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Concentration process
Assignee: Celanese Corp
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Filing: 1949-11-05
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Granted: 1951-10-09
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Henry K Dice
- 👤 Robert L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:50
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A PROCESS FOR THE SEPARATION AND PURIFICATION OF THE OXYGENATED ORGANIC COMPOUNS IN THE MIXTURE OF HOT REACTION GASES PRODUCED BY THE VAPOR PHASE PARTIAL OXIDATION OF ALIPHATIC HYDROCARBONS, SAID HOT REACTION GASES CONTAINING FORMALDEHYDE, WHICH PROCESS INCLUDES ABSORBING A PORTION OF THE PRODUCTS INCLUDING THE FORMALDEHYDE IN AN AQUEOUS FORMALDEHYDE QUENCHING MEDIUM TO FORM A CRUDE FORMALDEHYDE SOLUTION AND ABSORBING THE REMAINDER OF THE OXYGENATED PRODUCTS IN WATER TO FORM A SOLUTION THEREOF, THE STEPS WHICH COMPRISE SEPARATING THE ORGANIC COMPOUNDS IN THE AQUEOUS SOLUTION OF SAID REMAINDER OF THE OXYGENATED ORGANIC COMPOUNS BY A PLURALITY OF DISTILLATION OPERATIONS YIELDING A PLURALITY OF SEPARATE STREAMS WHILE MAINTAINING THE PH OF EACH OF THE STREAMS ON THE ACID SIDE AND AT A PH OF ABOUT 4.0 TO 6.5 BY ADDING A NEUTRALIZING AGENT THERETO TO EFFECT A REDUCTION IN THE NORMAL ACIDITY OF SAID STREAMS.
Claim 2
Dependent Claim
146 words
IN A PROCESS FOR THE SEPARATION AND PURIFICATION OF THE OXYGENATED ORGANIC COMPOUNS IN THE MIXTURE OF HOT REACTION GASES PRODUCED BY THE VAPOR PHASE PARTIAL OXIDATION OF ALIPHATIC HYDROCARBONS, SAID HOT REACTION GASES CONTAINING FORMALDEHYDE, WHICH PROCESS INCLUDES ABSORBING A PORTION OF THE PRODUCTS INCLUDING THE FORMALDEHYDE IN AN AQUEOUS FORMALDEHYDE QUENCHING MEDIUM TO FORM A CRUDE FORMALDEHYDE SOLUTION AND ABSORBING THE REMAINDER OF THE OXYGENATED PRODUCTS IN WATER TO FORM A SOLUTION THEREOF, THE STEPS WHICH COMPRISE SEPARATING THE ORGANIC COMPOUNDS IN THE AQUEOUS SOLUTION OF SAID REMAINDER OF THE OXYGENATED ORGANIC COMPOUNS BY A PLURALITY OF DISTILLATION OPERATIONS YIELDING A PLURALITY OF SEPARATE STREAMS WHILE MAINTAINING THE PH OF EACH OF THE STREAMS ON THE ACID SIDE AND AT A PH OF ABOUT 4.0 TO 6.5 BY ADDING A NEUTRALIZING AGENT THERETO TO EFFECT A REDUCTION IN THE NORMAL ACIDITY OF SAID STREAMS.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |