US3751232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for effecting a multiple stage contact of a reactant stream
Assignee: Universal Oil Products Co
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Filing: 1971-01-14
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Granted: 1973-08-07
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Expires: 1991-01-14
Abstract
Abstract Method and apparatus for effecting a multiple stage contact to a reactant stream such as a multistage dehydrogenation of ethylbenzene to styrene. The reaction feed stream is passed alternately in outward and inward radial flow directions through a plurality of adjacent annular reaction zones and withdrawn from intermediate reaction zones and channeled to mixing zones longitudinally adjacent the next successive annular reaction zones. A heat exchange medium is introduced into such mixing zones in a manner effecting both a downstream flow thereof to the next reaction zone and mixing with the reactant stream.
Inventors
- 👤 H Borre
- 👤 W Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0403; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/919; Y10S585/921; Y10S585/922; Y10S585/924
Claims Analysis
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |