US3816077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorine dioxide generating system
Assignee: Kemanord AB
•
Filing: 1971-05-21
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Granted: 1974-06-11
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Expires: 1991-05-21
Abstract
Abstract A chlorine dioxide producing system comprising a generatorevaporator-crystallizer reaction tower, a condenser, a chlorine dioxide absorption tower, vacuum producing means, a chlorine absorption tower and a solid-liquid separator in communication with the reaction tower provides an extremely efficient chlorine dioxide generation system.
Inventors
- 👤 H Rosen
- 👤 W Fuller
- 👤 A Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:44
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023; C01B11/025; C01B11/024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
The reaction tower of claim 1 in which said outlet for the removal of crystalline alkali metal salt comprises an aproned titanium sleeve extending into said outlet aperture to form an apron contiguous with said internal gel coat of polyester resin.
Claim 2
Dependent Claim
28 words
The reaction tower of claim 1 in which the ratio of the internal diameter of the reactor to the overall height of the reaction tower is about 1:4-6.
Claim 3
Dependent Claim
82 words
The reaction tower of claim 1 in which said reaction solution circulation half loop conduit contains a circulating pump, outlet means for the removal of a fraction of a circulating reaction solution for the purpose of removing solid alkali metal salt by-product, inlet means for the introduction of alkali metal chlorate and in the form of an aqueous solution, a circulating pump, heat exchange means, and plural injection jets for the introduction of a strong mineral acid into the circulating reaction solution.
Claim 4
Independent Claim
302 words
A system for the preparation of chlorine dioxide, chlorine, and an alkali metal salt including: a. a generator-evaporator-crystallizer reaction tower being a unilocular enclosure consisting of a sidewall, a convex top and a concave bottom, said sidewall being provided with inlet means for the introduction of reactants and water, outlet means for the removal of gaseous reaction products and water vapor, separate outlet means, having a contiguous titanium surface for the removal of crystalline alkali metal salt in the form of and aqueous slurry, in which said inlet for reactants and water and said outlet for the removal of alkali metal salt in the form of a slurry constitute a reaction solution circulation half loop conduit containing an outlet means for the removal of a fraction of a circulating reaction solution for the purpose of removing solid alkali metal salt by-product, inlet means for the introduction of alkali metal chlorate, in the form of an aqueous solution, and plural injection means for the introduction of a strong mineral acid into the circulating reaction solution; b. a chlorine dioxide absorption tower including reaction gas inlet means in communication with Said generator via said reaction gas outlet means, water inlet means, outlet means for and aqueous solution of ClO2 and outlet means for the non-absorbed reaction gas; c. a chlorine absorption tower including reaction gas inlet means in communication with said non-absorbed reaction gas outlet means of said chlorine dioxide absorption tower, water inlet means, and outlet means for an aqueous solution of chlorine; d. vacuum producing means; and e. a solid-liquid separator for said slurry of alkali metal salt in communication with said outlet means for alkali metal salt in said generator and conduit from said solids separator to said chlorine dioxide generator to return liquid from said solids separator to said generator.
Claim 5
Dependent Claim
74 words
The system of claim 5 in which said chlorine dioxide absorption tower communicates with said generator via a direct contact cooler tower in which the heat values accompanying said chlorine dioxide, chlorine and water vapor from said generator are rapidly dissipated by direct contact with water spray at a temperature from an ambient temperature to about 80*F., said direct contact cooler toward being equipped with a spray nozzle and an outlet for non-absorbed gas.
Claim 6
Dependent Claim
60 words
The system of claim 6 in which said generator-evaporator-crystallizer reactor vessel, said direct contact cooler tower, and said chlorine dioxide absorption tower are in serial communication with a steam jet eductor operating to draw a vacuum in the up line apparatus of such magnitude that the gaseous mixture generated in said reactor vessel is swept through said serial apparatus system.
Claim 7
Dependent Claim
28 words
The system of claim 5 in which said solid-liquid separator includes a cyclone separator to classify solid alkali metal salt prior to separation from reaction solution by filtration.
Claim 8
Dependent Claim
22 words
The system of claim 5 in which said chlorine dioxide absorption tower communicates with said generator via an indirect contact heat exchanger.
Claim 9
Dependent Claim
15 words
The system of claim 5 in which said vacuum-producing means is a mechanical vacuum pump.
Claim 10
Dependent Claim
265 words
A generator-evaporator-crystallizer reaction tower for the production of chlorine dioxide being a unilocular enclosure having a sidewall, a convex top and a concave bottom, said sidewall presenting in cross-section from the interior to the exterior, an internal gel coat of a polyester resin approximately 500 mils in thickness, a chopped fiberglass filled polyester resin section approximately one-fourth inch in thickness, and an external section of polyester resin impregnated wound glass filament section approximately 1 1/8 inches in thickness, said polyester resin being the reaction product of about 0.5 mole fraction of chlorendic acid and maleic anhydride, and about 0.5 mole fraction neopentyl glycol in about 45 parts of styrene per 100 parts of resin, said sidewall being provided with inlet means for the introduction of reactants and water and an outlet means for the removal of crystalline alkali metal salts in the form of a slurry constituting a reaction solution circulation half loop conduit with said inlet means, said conduit containing a circulating pump, outlet means for the removal of a fraction of a circulating reaction solution for the purpose of removing solid alkali metal salt by-product, inlet means for the introduction of alkali metal chlorate in the form of an aqueous solution, heat exchange means, and plural perfluoropolyethylene injection jets longitudinally disposed in said reaction solution circulation half loop conduit longitudinally with respect to the direction of flow of reaction solution, in such manner that the circulating reaction solution rapidly dilutes and mixes with the introduction of a strong mineral acid and outlet means for the removal of gaseous reaction products and water vapor.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |