US3247237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile and methacrylonitrile by the thermal cracking of saturated nitriles
Assignee: Eastman Kodak Co
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Filing: 1963-07-01
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Granted: 1966-04-19
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Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:07
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/06; C07C255/07; C07C255/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A CONTINUOUS PROCESS COMPRISING CONTINUOUSLY FEEDING ISOBUTYRONITRILE VAPOR INTO AN ESSENTIALLY OXYGEN AND CATALYST-FREE REACTION ZONE AT A RATE SUFFICIENT TO MAINTAIN THE HOURLY SPACE VELOCITY BETWEEN 1500 AND 7000, AND THE LINEAR VELOCITY BETWEEN 75 AND 400 FEET PER SECOND, SAID REACTION ZONE BEING SUFFICIENTLY HEATED TO MAINTAIN THE GASEOUS CONTENTS THEREOF AT BETWEEN 550*C. AND 750*C., WHEREY CHEMICAL DECOMPOSITION OF THE ISOBUTYRONITRILE TO A MIXTURE CONSISTING PRIMARILY OF ACRYLONITRILE AND METHACRYLONITRILE IS THERMALLY INDUCED.
Claim 2
Dependent Claim
76 words
A CONTINUOUS PROCESS COMPRISING CONTINUOUSLY FEEDING ISOBUTYRONITRILE VAPOR INTO AN ESSENTIALLY OXYGEN AND CATALYST-FREE REACTION ZONE AT A RATE SUFFICIENT TO MAINTAIN THE HOURLY SPACE VELOCITY BETWEEN 1500 AND 7000, AND THE LINEAR VELOCITY BETWEEN 75 AND 400 FEET PER SECOND, SAID REACTION ZONE BEING SUFFICIENTLY HEATED TO MAINTAIN THE GASEOUS CONTENTS THEREOF AT BETWEEN 550*C. AND 750*C., WHEREY CHEMICAL DECOMPOSITION OF THE ISOBUTYRONITRILE TO A MIXTURE CONSISTING PRIMARILY OF ACRYLONITRILE AND METHACRYLONITRILE IS THERMALLY INDUCED.
Claim 3
Dependent Claim
41 words
A CONTINUOUS PROCESS FOR PRODUCING ACRYLONITRILE COMPRISING PASSING PROPIONITRILE IN VAPOR FORM THROUGH AN ESSENTIALLY OXYGEN AND CATALYST-FREE REACTION ZONE HEATED AT 550-750*C., AT AN HOURLY SPACE VELOCITY OF FROM 1500-7000 AND A LINEAR VELOCITY OF FROM 75-400 FEET PER SECOND.
Claim 4
Dependent Claim
41 words
A CONTINUOUS PROCESS FOR PRODUCING ACRYLONITRILE COMPRISING PASSING PROPIONITRILE IN VAPOR FORM THROUGH AN ESSENTIALLY OXYGEN AND CATALYST-FREE REACTION ZONE HEATED AT 550-750*C., AT AN HOURLY SPACE VELOCITY OF FROM 1500-7000 AND A LINEAR VELOCITY OF FROM 75-400 FEET PER SECOND.
References Cited (Backward Citations)
US2385552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |