Patent US3200141A successfully refreshed from Google Patents.
US3200141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of acrylonitrile
Assignee: Standard Oil Co
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Filing: 1963-05-27
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Granted: 1965-08-10
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:22
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; B01J38/00; B01J38/04; B01J38/12; B01J38/14; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A CATALYTIC PROCESS FOR THE CONTINUOUS MANUFACTURE OF ACRYLONITRILE WHICH CAN BE CARRIED OUT FOR LONG PERIODS OF TIME WITHOUT ANY APPARENT LOSS OF CATALYST ACTIVITY AND WITHOUT ANY APPARENT DECLINE IN THE PRODUCTION OF ACRYLONITRILE CONSISTING OF THE STEPS OF CONTINUOUSLY REACTING A GASEOUS MIXTURE COMPRISING PROPYLENE, AMMONIA AND OXYGEN IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BISMUTH, TIN AND ANTIMONY SALTS OF PHOSPHOMOLYBDIC AND MOLYBIDIC ACIDS, BISMUTH PHOSPHOTUNGSTATE AND COBALT MOLYBDATE AT AN ELEVATED TEMPERATURE; CONTINUOUSLY MAINTAINING THE ACTIVITY OF SAID CATALYST BY CONTINUOUSLY MEASURING THE OXYGEN CONTENT OF THE EFFLUENT FROM SAID REACTION AND CONTINUOUSLY ADJUSTING THE RELATIVE PROPORTION OF OXYGEN INTRODUCED INTO SAID REACTION IN ACCORDANCE WITH SAID OXYGEN MEASUREMENTS SO AS TO MAINTAIN THE OXYGEN CONTENT OF THE REACTION EFFLUENT AT LEAST 0.1 MOLE PERCENT AND NOT OVER 7 MOLE PERCENT.
Claim 2
Dependent Claim
141 words
A CATALYTIC PROCESS FOR THE CONTINUOUS MANUFACTURE OF ACRYLONITRILE WHICH CAN BE CARRIED OUT FOR LONG PERIODS OF TIME WITHOUT ANY APPARENT LOSS OF CATALYST ACTIVITY AND WITHOUT ANY APPARENT DECLINE IN THE PRODUCTION OF ACRYLONITRILE CONSISTING OF THE STEPS OF CONTINUOUSLY REACTING A GASEOUS MIXTURE COMPRISING PROPYLENE, AMMONIA AND OXYGEN IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF BISMUTH, TIN AND ANTIMONY SALTS OF PHOSPHOMOLYBDIC AND MOLYBIDIC ACIDS, BISMUTH PHOSPHOTUNGSTATE AND COBALT MOLYBDATE AT AN ELEVATED TEMPERATURE; CONTINUOUSLY MAINTAINING THE ACTIVITY OF SAID CATALYST BY CONTINUOUSLY MEASURING THE OXYGEN CONTENT OF THE EFFLUENT FROM SAID REACTION AND CONTINUOUSLY ADJUSTING THE RELATIVE PROPORTION OF OXYGEN INTRODUCED INTO SAID REACTION IN ACCORDANCE WITH SAID OXYGEN MEASUREMENTS SO AS TO MAINTAIN THE OXYGEN CONTENT OF THE REACTION EFFLUENT AT LEAST 0.1 MOLE PERCENT AND NOT OVER 7 MOLE PERCENT.
References Cited (Backward Citations)
US2904580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |