US3787188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for catalytic reactions
Assignee: Dow Chemical Co
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Filing: 1971-11-26
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Granted: 1974-01-22
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Expires: 1991-11-26
Abstract
Abstract A catalytic reactor has separate inlet ports for a hydrocarbon stream which is to be dehydrogenated and for a heated fluid stream which maintains the reaction temperature such that the hydrocarbon and the heat maintaining fluid are mixed in the presence of catalyst. One of the streams flows through the catalyst linearly and the other flows radially. The method of dehydrogenating ethyl benzenes and ring substituted derivatives thereof to the corresponding styrenes using a hot fluid stream as a means for maintaining the reaction temperature, and using the above reactor, reduces the cracking of the ethyl benzenes and corresponding styrenes to benzene and its homologs and to carbonaceous products.
Inventors
- 👤 G Lyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:11
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J8/00; B01J8/001; B01J8/02; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/922
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
The structure of claim 1 in which the inlet port for the reactant is at the top of the reactor and the inlet port for a temperature controlling fluid is in the bottom portion of the reactor.
Claim 2
Dependent Claim
56 words
The structure of claim 1 in which the inlet port for the temperature controlling fluid comprises a plurality of spaced tubes extending from said tube sheet below the effluent port and terminating in and slightly below the top of the catalyst bed, said tubes being externally insulated between said tube sheet and said perforate support means.
Claim 3
Dependent Claim
37 words
The structure of claim 3 in which the tubes have a diameter of from about 2 to about 6 inches and are spaced from each other by a distance of from about 1 to 3 tube diameters.
Claim 4
Dependent Claim
32 words
The structure of claim 4 in which each tube has an imperforate top and a plurality of openings adjacent the top for passage of the temperature controlling fluid into the catalyst bed.
Claim 5
Dependent Claim
74 words
The structure of claim 1 having a deflector at the top inlet port, a distributor plate spaced above the catalyst bed, the perforate support means being a screened perforate plate, a reservoir for said temperature controlling fluid, and a plurality of tubular members extending from said reservoir and terminating in the catalyst bed, said tubular members having an imperforate top and openings adjacent the top for passage of said fluid into the catalyst bed.
References Cited (Backward Citations)
US1848466A
Cited
US1850398A
Cited
US1893492A
Cited
US1893372A
Cited
US3161669A
Cited
US3663179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |