US3853986A
Expired / Lapsed
US
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Bubble column-cascade reactor and method
Assignee: Bayer Pharma AG
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Filing: 1972-11-14
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Granted: 1974-12-10
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Expires: 1992-11-14
Abstract
Abstract A bubble column-cascade reactor comprising a vertical column and a plurality of equidistantly-spaced, horizontally-mounted, uniformly-perforated plates therein, the aperture area of each plate being dependent on the cross-sectional area of the column and the plate-spacing being such that adjacent plates are separated vertically by a distance at least three times the diameter of the columnar reactor. A method for reacting a liquid with a gas or with a non-gaseous reagent in the presence of an inert or reactive gas employing such a bubble column-cascade reactor with little or no liquid back-mixing, dwell time in the reactor being dependent on the liquid and gas throughputs.
Inventors
- 👤 Eckhart Blass
- 👤 Kurt-Henning Koch
- 👤 Wolf Cornelius
- 👤 Bodo Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/065; B; B01; B01J; B01J10/00; B01J10/002; B01J19/00; B01J19/24; B01J19/2415; B01J19/242; B01J8/00; B01J8/18; B01J8/20; B01J8/22; B01J8/24; B01J8/44; B01J2219/00; B01J2219/00049; B01J2219/00168; B01J2219/00171; B01J2219/00761; B01J2219/00763; B01J2219/00765; B01J2219/00777; B01J2219/18; B01J2219/185; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1943
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A BUBBLE COLUMN-CASCADE REACTOR FOR CONTINUOUSLY REACTING A LIQUID WITH A GAS OR WITH A NON-GASEOUS REAGENT IN THE PRESENCE OF AN INERT OR REACTIVE GAS, SAID REACTOR COMPRISING A VERTICAL COLUMN HAVING A PLURALITY OF PERFORATED PLATES EQUIDISTANTLY STACKED EXACTLY HORIZONTALLY WITHIN SAID COLUMN, ADJACENT PLATES BEING SEPARATED VERTICALLY BY A DISTANCE AT LEAST 3 TIMES THE DIAMETER OF THE REACTOR, SAID PLATES BEING TIGHTLY JOINED TO THE INTERIOR WALL OF SAID REACTOR, EACH PLATE HAVING A PLURALITY OF APERTURES THEREIN OF THE SAME SIZE DISTRIBUTED UNIFORMLY OVER THE AREA OF THE PLATE, THE TOTAL FREE APERTURE AREA OF THE PLATES BEING FROM 0.5 PERCENT TO 15 PERCENT OF THE CROSS-SECTIONAL AREA OF THE EMPTY REACTOR.
Claim 2
Dependent Claim
117 words
A BUBBLE COLUMN-CASCADE REACTOR FOR CONTINUOUSLY REACTING A LIQUID WITH A GAS OR WITH A NON-GASEOUS REAGENT IN THE PRESENCE OF AN INERT OR REACTIVE GAS, SAID REACTOR COMPRISING A VERTICAL COLUMN HAVING A PLURALITY OF PERFORATED PLATES EQUIDISTANTLY STACKED EXACTLY HORIZONTALLY WITHIN SAID COLUMN, ADJACENT PLATES BEING SEPARATED VERTICALLY BY A DISTANCE AT LEAST 3 TIMES THE DIAMETER OF THE REACTOR, SAID PLATES BEING TIGHTLY JOINED TO THE INTERIOR WALL OF SAID REACTOR, EACH PLATE HAVING A PLURALITY OF APERTURES THEREIN OF THE SAME SIZE DISTRIBUTED UNIFORMLY OVER THE AREA OF THE PLATE, THE TOTAL FREE APERTURE AREA OF THE PLATES BEING FROM 0.5 PERCENT TO 15 PERCENT OF THE CROSS-SECTIONAL AREA OF THE EMPTY REACTOR.
Claim 3
Dependent Claim
29 words
A reactor as in claim 1 wherein the total free aperture area of the plates is from 0.5 to 5 percent of the cross-sectional area of the empty reactor.
Claim 4
Dependent Claim
16 words
A reactor as in claim 1 wherein said apertures are right circular cylindrical in vertical cross-section.
Claim 5
Dependent Claim
18 words
A reactor as in claim 3 wherein said right circular cylindrical apertures are beveled at their lower end.
Claim 6
Dependent Claim
14 words
A reactor as in claim 1 wherein said apertures are frusto-conical in vertical cross-section.
Claim 7
Independent Claim
192 words
A method for continuously reacting a liquid with a gas which comprises flowing said liquid and gas upwardly through a walled vertically columnar reaction zone separated into a plurality of reaction compartments by perforated plates equidistantly stacked exactly horizontally in said reaction zone, adjacent plates being separated vertically by a distance at least three times the diameter of said columnar reaction zone and being tightly joined to the interior wall thereof, each plate having a plurality of apertures therein of the same size distributed uniformly over the area of the plate, the total free aperture area of the plates being from 0.5 percent to 15 percent of the cross-sectional area of said columnar reaction zone, the flow of gas and liquid through said reaction zone being such that Reynolds numberLd/Reynolds numberGd 0.1, whereby a gas cushion is formed under said plates, and wherein Reynolds numberLd wLd X d X Rho L/ eta L, Reynolds numberGd wGd X d X Rho G/ eta G, w velocity d aperture diameter Rho density eta dynamic viscosity and the subscripts d, G, and L refer respectively to aperture diameter, the gas phase, and the liquid phase.
Claim 8
Independent Claim
192 words
A method for continuously reacting a liquid with a gas which comprises flowing said liquid and gas upwardly through a walled vertically columnar reaction zone separated into a plurality of reaction compartments by perforated plates equidistantly stacked exactly horizontally in said reaction zone, adjacent plates being separated vertically by a distance at least three times the diameter of said columnar reaction zone and being tightly joined to the interior wall thereof, each plate having a plurality of apertures therein of the same size distributed uniformly over the area of the plate, the total free aperture area of the plates being from 0.5 percent to 15 percent of the cross-sectional area of said columnar reaction zone, the flow of gas and liquid through said reaction zone being such that Reynolds numberLd/Reynolds numberGd 0.1, whereby a gas cushion is formed under said plates, and wherein Reynolds numberLd wLd X d X Rho L/ eta L, Reynolds numberGd wGd X d X Rho G/ eta G, w velocity d aperture diameter Rho density eta dynamic viscosity and the subscripts d, G, and L refer respectively to aperture diameter, the gas phase, and the liquid phase.
Claim 9
Independent Claim
201 words
A method for continuously reacting a liquid with a non-gaseous reagent in the presence of a gas which comprises flowing said liquid, gas, and non-gaseous reagent upwardly through a walled vertically columnar reaction zone separated into a plurality of reaction compartments by perforated plates equidistantly stacked exactly horizontally in said reaction zone, adjacent plates being separated vertically by a distance at least three times the diameter of said columnar reaction zone and being tightly joined to the interior wall thereof, each plate having a plurality of apertures therein of the same size distributed uniformly over the area of the plate, the total free aperture area of the plates being from 0.5 percent to 15 percent of the cross-sectional area of said columnar reaction zone, the flow of gas and liquid through said reaction zone being such that Reynolds numberLd/Reynolds numberGd 0.1, whereby a gas cushion is formed under said plates, and wherein Reynolds numberLd wLd X d X Rho L/ eta L, Reynolds numberGd wGd X d X Rho G/ eta G, w velocity D aperture diameter Rho density eta dynamic viscosity and the subscripts d, G, and L refer respectively to aperture diameter, the gas phase, and the liquid phase.
Claim 10
Independent Claim
201 words
A method for continuously reacting a liquid with a non-gaseous reagent in the presence of a gas which comprises flowing said liquid, gas, and non-gaseous reagent upwardly through a walled vertically columnar reaction zone separated into a plurality of reaction compartments by perforated plates equidistantly stacked exactly horizontally in said reaction zone, adjacent plates being separated vertically by a distance at least three times the diameter of said columnar reaction zone and being tightly joined to the interior wall thereof, each plate having a plurality of apertures therein of the same size distributed uniformly over the area of the plate, the total free aperture area of the plates being from 0.5 percent to 15 percent of the cross-sectional area of said columnar reaction zone, the flow of gas and liquid through said reaction zone being such that Reynolds numberLd/Reynolds numberGd 0.1, whereby a gas cushion is formed under said plates, and wherein Reynolds numberLd wLd X d X Rho L/ eta L, Reynolds numberGd wGd X d X Rho G/ eta G, w velocity D aperture diameter Rho density eta dynamic viscosity and the subscripts d, G, and L refer respectively to aperture diameter, the gas phase, and the liquid phase.
Claim 11
Dependent Claim
45 words
A method as in claim 7 wherein said non-gaseous reagent is a finely divided solid entering the reaction zone in an amount by weight, per unit time, which is up to 15 percent of the weight of liquid entering the reaction zone per unit time.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |