US3918917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reacting organic compounds and sulfur trioxide
Assignee: Mitsubishi Chemical Corp
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Filing: 1973-04-16
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Granted: 1975-11-11
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Expires: 1993-04-16
Abstract
Abstract A multi-tube thin-film type reaction apparatus for the reaction of an organic compound and gaseous sulfur trioxide, said apparatus comprising a plurality of tube assemblies comprising a reaction tube provided with a gas- and liquid-feeding structure at the upper portion of the reaction tube, characterized in that: the reaction tubes have an inner diameter of 16 - 90 mm, an inner tube having liquid-distributing holes of 1 - 3 mm in diameter is provided at the top end of each reaction tube, said inner tube being surrounded by an outer tube to form a liquid receiver between both tubes, a reaction gas nozzle is inserted in the interior of said inner tube and communicates with said reaction tube to permit the substantially uninterrupted flow of reaction gas from the reaction gas nozzle to said reaction tube, the lateral clearance between said reaction tube and said reaction gas nozzle being greater than 2 mm and the end of said reaction gas nozzle being 5 - 300 mm below said liquid-distributing holes, a pressure-leveling opening is provided between the upper portion of said liquid receiver and said reaction tube, and liquid organic compound feed means is provided where at least a portion of each liquid organic compound feed means has an inner diameter of 0.5 - 5 mm and a length/inner diameter ratio of 10 - 1,000 to render the flow resistance from the source of liquid organic compound to a liquid receiver within the range 0.1 - 0.8 Kg/cm2.
Inventors
- 👤 Yoshiro Ashina
- 👤 Yasumasa Yamaguchi
- 👤 Atushi Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:46
CPC Classifications
C; C07; C07C; C07C305/00; C07C305/02; C07C305/04; C07C305/10; B; B01; B01J; B01J10/00; B01J10/02; B01J19/00; B01J19/24; B01J19/2415; B01J19/2425; B01J19/247; C07B; C07B45/00; C07B45/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
276 words
A MULTI-TUBE THIN-FILM TYPE REACTION APPARATUS FOR THE REACTION OF A LIQUID ORGANIC COMPOUND AND A GASEOUS SULFUR TRIOXIDE, SAID APPARATUS COMPRISING A PULRALITY OF A TUBE ASSEMBLIES COMPRISING A REACTION TUBE PROVIDED WITH A GAS- AND LIQUID-FEEDING STRUCTURE AT THE UPPER PORTION OF THE REACTION TUBE, CHARACTERIZED IN THAT: THE REACTION TUBES ARE PROVIDED SUBSTANTIALLY VERTICALLY AND HAVE AN INNER DIAMETER OF 16-90 MM, AN INNER TUBE OF A DIAMETER SUBSTANTIALLY EQUAL TO THAT OF THE REACTION TUBE AND HAVING LIQUID-DISTRIBUTING HOLES OF 1-3 MM IN DIAMETER IS PROVIDED AT THE TOP END OF EACH REACTION TUBE, SAID INNER TUBE BEING SURROUNDED BY AN OUTER TUBE TO FORM A LIQUID RECEIVER BETWEEN BOTH TUBES, LIQUID ORGANIC COMPOUND FEED MEANS COMMUNICATING WITH SAID LIQUID RECEIVER, A REACTION GAS NOZZLE INSERTED IN HE INTER OF SAID INNER TUBE COMMUNICATING WITH AND AT LEAST PARTIALLY EXTENDING ONTO SAID REACTON TUBE TO PERMIT THE SUBSTANTIALLY UNINTERRUPTED FLOW OF REACTION GAS FROM THE REACTION GAS NOZZLE TO SAID REACTON TUBE, THE LTERIAL CLEARANCE BETWEEN SAID REACTION TUBE AND SAID REACTION DAS NOZZLE BEING GREATER THAN 2 MM AND THE END OF SAID REACTION GAS NOZZLE BEING 5 - 300 MM BELOW SAID LIQUID-DISTRIBUTING HLOES, A PRESSURE-LEAVING OPENING BEING PROVIDED BETWEEN THE UPPER PORTION OF SAID LIQUID RECEIVER AND THE UPPER PORTION OF SAID INNER TUBE, AND LIQUID ORGANIC COMPOUND FEED MEANS IS PROVIDED WHERRE AT LEAST A PORTION OF EACH LIQUID FEES MEANS HAVING AN INNER DIAMETER OF 0.5-5 MM AND A LENGTH/INNER DIAMETER RATIO OF 10-1,000 TO RENDER THE FLOW RESISTANCE FROM THE SOURCE OF LIQUID ORGANIC COMPOUND TO THE LIQUID RECEIVER WITHIN THE RANGE 0.1 - 0.8 KG/CM2.
Claim 2
Dependent Claim
276 words
A MULTI-TUBE THIN-FILM TYPE REACTION APPARATUS FOR THE REACTION OF A LIQUID ORGANIC COMPOUND AND A GASEOUS SULFUR TRIOXIDE, SAID APPARATUS COMPRISING A PULRALITY OF A TUBE ASSEMBLIES COMPRISING A REACTION TUBE PROVIDED WITH A GAS- AND LIQUID-FEEDING STRUCTURE AT THE UPPER PORTION OF THE REACTION TUBE, CHARACTERIZED IN THAT: THE REACTION TUBES ARE PROVIDED SUBSTANTIALLY VERTICALLY AND HAVE AN INNER DIAMETER OF 16-90 MM, AN INNER TUBE OF A DIAMETER SUBSTANTIALLY EQUAL TO THAT OF THE REACTION TUBE AND HAVING LIQUID-DISTRIBUTING HOLES OF 1-3 MM IN DIAMETER IS PROVIDED AT THE TOP END OF EACH REACTION TUBE, SAID INNER TUBE BEING SURROUNDED BY AN OUTER TUBE TO FORM A LIQUID RECEIVER BETWEEN BOTH TUBES, LIQUID ORGANIC COMPOUND FEED MEANS COMMUNICATING WITH SAID LIQUID RECEIVER, A REACTION GAS NOZZLE INSERTED IN HE INTER OF SAID INNER TUBE COMMUNICATING WITH AND AT LEAST PARTIALLY EXTENDING ONTO SAID REACTON TUBE TO PERMIT THE SUBSTANTIALLY UNINTERRUPTED FLOW OF REACTION GAS FROM THE REACTION GAS NOZZLE TO SAID REACTON TUBE, THE LTERIAL CLEARANCE BETWEEN SAID REACTION TUBE AND SAID REACTION DAS NOZZLE BEING GREATER THAN 2 MM AND THE END OF SAID REACTION GAS NOZZLE BEING 5 - 300 MM BELOW SAID LIQUID-DISTRIBUTING HLOES, A PRESSURE-LEAVING OPENING BEING PROVIDED BETWEEN THE UPPER PORTION OF SAID LIQUID RECEIVER AND THE UPPER PORTION OF SAID INNER TUBE, AND LIQUID ORGANIC COMPOUND FEED MEANS IS PROVIDED WHERRE AT LEAST A PORTION OF EACH LIQUID FEES MEANS HAVING AN INNER DIAMETER OF 0.5-5 MM AND A LENGTH/INNER DIAMETER RATIO OF 10-1,000 TO RENDER THE FLOW RESISTANCE FROM THE SOURCE OF LIQUID ORGANIC COMPOUND TO THE LIQUID RECEIVER WITHIN THE RANGE 0.1 - 0.8 KG/CM2.
Claim 3
Dependent Claim
45 words
An apparatus as claimed in claim 1 further having a plurality of orifices of substantially equal flow resistance at the upper part of each outer tube of a tube assembly for the introduction of secondary gas, said orifices being coupled to a secondary gas source.
Claim 4
Dependent Claim
35 words
An apparatus as claimed in claim 1 where the plurality of tube assemblies are enclosed in a shell provided with means to circulate a cooling medium at least about the exterior of said reaction tubes.
Claim 5
Dependent Claim
40 words
An apparatus as claimed in claim 3 where the top of said reaction tubes is attached to a pipe plate which supports the bottom of the gas- and liquid-feeding structure and separates the gas-and liquid-feeding structure from the cooling medium.
Claim 6
Dependent Claim
73 words
An apparatus as claimed in claim 1 where said liquid organic compound feed means comprises a common source of liquid organic compound which is branched into a plurality of individual flow passages, each flow passage feeding liquid organic compound to each liquid receiver, whereby upon the passage of reactant gas through said reaction gas nozzle a substantially constant molar ratio of liquid organic compound/reactant gas is maintained in each of said reaction tubes.
Claim 7
Dependent Claim
37 words
An apparatus as claimed in claim 5 where the lateral clearance between the outside wall of the bottom end of said reaction gas nozzle and the inner wall of said reaction tube is 3 - 5 mm.
Claim 8
Dependent Claim
34 words
An apparatus as claimed in claim 5 where the center line of the reaction gas nozzle and the center line of the reaction tube in a tube assembly are in-line to within 0.5 mm.
Claim 9
Dependent Claim
19 words
An apppatus as claimed in claim 7 where the reaction nozzle has a length of greater than 150 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |