US2527660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methacrylonitrile purification
Assignee: Honeywell International Inc
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Filing: 1949-07-12
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Granted: 1950-10-31
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Expires: 1969-07-12
Abstract
No abstract record available.
Inventors
- 👤 Leo J Spillane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:47
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR TREATMENT OF CRUDE METHACRYLONITRILE SYNTHESIS MIXTURES DERIVED FROM ISOBUTYLENE-NITROSL CHLORIDE ADDUCT WHICH COMPRISES SEPARATING SUCH MIXTURE INTO AQUEOUS AND METHACRYLONITRILE LAYERS; FRACTIONATING OUT FROM METHACRYLONITRILE LAYER A MIXTURE OF WATER AND METHACROLEIN BY-PRODUCTS PRESENT THEREIN; COOLING THE RESULTING DISTILLATE TO FORM AN AQUEOUS LAYER AND A METHACROLEIN LAYER; RETURNING METHACROLEIN FROM SAID METHACROLEIN LAYER TO ORGANIC LAYER OF CRUDE METHACRYLONITRILE SYTHESIS MIXTURE AND CONTINUING FRACTIONATIONOF SAID ORGANIC LAYER TO REMOVE FURTHER QUANTITITES OF WATER THEREFROM; WITHDRAWING CRUDE METHACRYLONITRILE THUS FREED OF WATER; AND FURTHER FRACTIONATING SAID METHACRYLONITRILE, SEPARATING METHACROLEIN THEREFROM AND OBTAINING SUBSTANTIALLY PURE METHACRYLONITRILE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR TREATMENT OF CRUDE METHACRYLONITRILE SYNTHESIS MIXTURES DERIVED FROM ISOBUTYLENE-NITROSL CHLORIDE ADDUCT WHICH COMPRISES SEPARATING SUCH MIXTURE INTO AQUEOUS AND METHACRYLONITRILE LAYERS; FRACTIONATING OUT FROM METHACRYLONITRILE LAYER A MIXTURE OF WATER AND METHACROLEIN BY-PRODUCTS PRESENT THEREIN; COOLING THE RESULTING DISTILLATE TO FORM AN AQUEOUS LAYER AND A METHACROLEIN LAYER; RETURNING METHACROLEIN FROM SAID METHACROLEIN LAYER TO ORGANIC LAYER OF CRUDE METHACRYLONITRILE SYTHESIS MIXTURE AND CONTINUING FRACTIONATIONOF SAID ORGANIC LAYER TO REMOVE FURTHER QUANTITITES OF WATER THEREFROM; WITHDRAWING CRUDE METHACRYLONITRILE THUS FREED OF WATER; AND FURTHER FRACTIONATING SAID METHACRYLONITRILE, SEPARATING METHACROLEIN THEREFROM AND OBTAINING SUBSTANTIALLY PURE METHACRYLONITRILE.
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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |