US3642452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage reactors
Assignee: Rhone Poulenc SA
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Filing: 1969-11-26
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Granted: 1972-02-15
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Expires: 1989-11-26
Abstract
Abstract A multistage reactor including a vertical column divided into stages by horizontal separation plates. Each stage includes a bundle of vertical tubes, supported by upper and lower horizontal support plates, the tubes serving for the ascent and descent of liquid within such stage. The ascent tubes extend above the upper support plates by between 0.5 and 10 times their diameter. Through pipes in each separation plate, coaxial with the ascent tubes of the stage above, carry up-flowing gas or vapor and a down tube extends through each separation plate partially into the space above the upper support plate of the stage below.
Inventors
- 👤 Jean Roget
- 👤 Philippe Tarbouriech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:47
CPC Classifications
B; B01; B01J; B01J10/00; B01J19/00; B01J19/24; B01J19/2415; B01J19/2435; F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
A reactor as claimed in claim 1, wherein each down tube is positioned centrally of the associated separation plate.
Claim 2
Dependent Claim
45 words
A reactor as claimed in claim 1, wherein the tubes of a bundle are arranged in a plurality of concentric rings, the said portions which extend above the upper support plate of the tubes of a ring being of the same height as each other.
Claim 3
Dependent Claim
24 words
A reactor as claimed in claim 3, wherein said portions of one ring extend to a different height from said portions of another ring.
Claim 4
Dependent Claim
16 words
A reactor as claimed in claim 1 and further comprising upper chamfered ends to said portions.
Claim 5
Dependent Claim
31 words
A reactor as claimed in claim 1, wherein each bundle of tubes has associated therewith means for the circulation of a heating or cooling fluid around the tubes of a bundle.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |