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Class 423/580.2 - Heavy water


Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Products and processes wherein the water is in its heavy
No. of patents: 72
Last issue date: 07/01/2008


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NumberTitleIssue Date
7393447Apparatus, method for enrichment of the heavy isotopes of oxygen and production method for heavy oxygen water
An apparatus comprising first to third columns, wherein the outlet of a first column reboiler and the inlet of a second column condenser are connected by a first introduction conduit, and the outlet of a second distillation column reboiler and the inlet of a third c...
07/01/2008
7344688Process for treating alkali metals charged with tritium or components contaminated with alkali metals charged with tritium
The invention relates to a process for treating alkali metals such as sodium charged with tritium or components contaminated with alkali metals such as sodium charged with tritium, in which the alkali metal is reacted with liquid water or water vapor, so as to obtai...
03/18/2008
7302812Process for production of isotopes
A process for producing an isotopically enriched compound of a desired isotope includes (a) providing a cryogenic reaction zone containing a catalyst adapted to catalyze an isotope exchange reaction at a cryogenic reaction temperature, (b) feeding to the cryogenic r...
12/04/2007
7153486Wetproofed catalysts for hydrogen isotope exchange
A method to catalyze hydrogen isotope exchange between water and hydrogen in which the water and hydrogen are contacted with a wetproofed catalyst, the catalyst having a hydrophobic porous matrix which has dispersed therein catalytically active platinum and at least...
12/26/2006
6984327System and method for separating heavy isotopes of hydrogen oxide from water
An apparatus and method for separating heavy isotopes of hydrogen from contaminated water. The apparatus includes a treatment chamber with an elongated hollow core fiber (HCF) extending within the chamber. A reservoir holds contaminated water mixed with beads formed...
01/10/2006
6190637Method for preparing [F-18-]fluoride ion
The present invention provides a method for preparing [F-18]-fluoride ion which comprises the step of bringing [O-18]-enriched water containing [F-18]-fluoride ion formed by proton irradiation of [O-18]-enriched water into contact with a strongly acidic c...
02/20/2001
6074882Device determining a concentration of a gas mixture
In order to determine a concentration of a gas mixture, especially a hydrogen concentration of a containment atmosphere of a nuclear power station, a temperature change resulting from a catalytic reaction is measured. The gas mixture is diluted with a mot...
06/13/2000
5855921Pharmaceutical products for curing tumorous diseases and process for preparing same
The invention relates to products for curing tumorous diseases, comprising as active agent water or aqueous solutons, suitable for human consumption, having a deuterium content of 0.1 to 110 ppm, optionally together with carriers and/or auxilliaries, in t...
01/05/1999
5709791Method for producing oxygen and hydrogen
There are provided a method of producing a hydrogen halide and oxygen by reacting water with a halogen using activated carbon as a catalyst, a method of producing hydrogen by thermal decomposition of a hydrogen halide using chromium oxide as a catalyst, a...
01/20/1998
5470557Zeolites
Crystals of the Zeolite Analcime (Analcite) Na2 O.Al2 O3.4SiO.sub.2.2H.sub.2 O are provided having a largest dimension greater than 50 micron. A method for preparing such crystals by mixing aqueous solutions of aluminium s...
11/28/1995
5468462Geographically distributed tritium extraction plant and process for producing detritiated heavy water using combined electrolysis and catalytic exchange processes
A geographically distributed apparatus and process for detritiating heavy water is provided. The apparatus and process provide a remote site enrichment plant for producing an enriched stream of DT/D2 gas and a hydriding unit for forming a hydri...
11/21/1995
5259446Pressure pulse cleaning for adsorption tower distributors
An on-line method and apparatus for dislodging deposits from the distributors (12) in an adsorption tower (10) thereby cleaning the tower (10) by causing a surge in a fluid to dislodge the blocked openings (14) of the distributors (12)....
11/09/1993
5093098Method of controlling water/hydrogen isotopic exchange reaction plant
A method of controlling a single temperature type water/hydrogen isotopic exchange reaction plant comprising an electrolytic system, an exchange reaction column and a recombining system for separating degraded heavy water into product and waste both of wh...
03/03/1992
5084181Enrichment of water in components of heavy water
A method for the enrichment of the natural water in the components of heavy water such as D2 O and/or HDO being the source of deuterium. The method utilizes the passing of water through semipermeable hydrophobic membranes on which phase transit...
01/28/1992
4996033Catalytic method for concentrating isotopes
A method for concentrating an isotope from an admixture containing the isotope by contacting the admixture with a catalyst capable of selectively catalyzing a reaction with the isotope, and recovering the concentrated isotope from the reaction products. I...
02/26/1991
4915929Isotopic separation of D2 O from H2 O using ruthenium adsorbent
A method of enrichment of D2 O in solutions of D2 O in H2 O by contacting said solutions in the steam phase with hexagonal crystalline to produce enriched D2 O. The passages may be repeated to achieve a desired ...
04/10/1990
4882093Process and installation for the treatment of solid organic waste contaminated by tritium
The invention relates to a process and an installation for the treatment of tritium-contaminated, solid organic waste. The waste is contacted with the steam in enclosure (1) for extracting the tritium in the steam and the steam is then condensed at (11 an...
11/21/1989
4849155Process and apparatus for decontaminating exhaust gas from a fusion reactor fuel cycle of exhaust gas components containing chemically bonded tritium and/or deuterium
Process for decontaminating exhaust gas from a fusion reactor fuel cycle of exhaust gas components containing at least one heavy hydrogen isotope selected from tritium and deuterium in compound form, in which the at least one heavy hydrogen isotope is lib...
07/18/1989
4788051Improvements in enrichment systems for isotopes of hydrogen and/or oxygen
A new combination is disclosed of (I) a process for producing a substance enriched in a desired isotope of hydrogen and/or oxygen from a flow of liquid substance, e.g. water which becomes depleted in its content of said isotope, and (II) replenishing the ...
11/29/1988
4714525Process for separating high purity water
A process for purifying impure water, e.g. heavy water, which provides for the removal of dissolved inorganic and organic contaminants by distillation of the water and washed vapor withdrawal, and optional chemical pretreatment of oxidazable matter....
12/22/1987
4631263Water-repellent catalyst for gas/liquid reactions and process for gas/liquid reactions by using the same
A catalyst for gas/liquid reactions, characterized by having a sheet or film-form water-repellent porous carrier having gas permeability and liquid impermeability and a catalytically active component supported on at least one surface of said carrier....
12/23/1986
4564515Method for separating at least one heavy isotope from a hydrogen-containing medium
The multi-stage process separates at least one heavy isotope from a hydrogen-containing compound or a hydrogen containing mixture, using ammonia synthesis and a mixture of hydrogen and nitrogen. The main product is water at least substantially free of deu...
01/14/1986
4536488Method of manufacturing a crystalline silica/platinum catalyst structure
A crystalline, silica platinum catalyst structure is provided by soaking a hydrophobic, high surface area, crystalline silica (SiO2) lattice essentially free of aluminum oxide in the SiO2 lattice, such as silicalite in an aqueous sol...
08/20/1985
4519996Method for enriching and separating heavy hydrogen isotopes from substance streams containing such isotopes by means of isotope exchange
A process for enriching and separating heavy hydrogen isotopes having a heavy hydrogen cation (deuterium and/or tritium) from substance streams containing them, wherein the respectively present hydrogen isotopes are exchanged in chemical equilibria. A pro...
05/28/1985
4504460Method and plant for obtaining deuterium-enriched water
The synthesis gas plant is operated in n successive periods. During the first period, fresh water in excess is supplied to the synthesis gas plant (1) and the waste water from the resulting mixture is separated in a condenser (8) and supplied to a storage...
03/12/1985
4471014Ordered bed packing module
In one embodiment of the invention a catalyst packing module is provided which greatly enhances the vapour-liquid transfer rate in the overall hydrogen-liquid water isotopic exchange reaction between streams of gaseous hydrogen and liquid water. The catal...
09/11/1984
4470961Utilization of impure steam and recovery of deuterium therefrom
Certain impure steams, especially those from geothermal sources, are polluted with hydrogen sulfide, ammonia, carbon dioxide, other gases, and finely divided particulate solid matter in a form resembling dust or smoke. These contaminants reduce the effici...
09/11/1984
4444737Process for separating and recovering hydrogen isotope
Hydrogen isotope is separated and recovered with remarkable reduction in energy consumption in a compact apparatus using a cold reactor and a hot reactor based on dual temperature process by a combination of a first step of at least one isotope exchange r...
04/24/1984
4426370Method for the preparation of deuterium-enriched water in the preparation of hydrogen
The synthesis-gas plant is operated in a number of successive operating periods such that during the first operating period an excess of fresh water is supplied to the synthesis gas plant and the waste water from the resulting mixture is separated in a co...
01/17/1984
4414195Method for the preparation of deuterium-enriched water
Hydrogen is produced in a synthesis gas plant which is subdivided into several units. The units are operated in such a way that concentrated water is separated from the effluent leaving the first unit in a condenser and supplied to the next stage as feed ...
11/08/1983
4411798Process for separating D2 O from H2 O using surfactant systems
This invention relates to a process for separating heavy water from solutions. An anionic surfactant system is added to a solution of deuterium oxide in water. The separating agent added to the solution will form a first phase containing a majority of the...
10/25/1983
4399120Hydrogen-water isotopic exchange process
Deuterium is concentrated in a hydrogen-water isotopic exchange process enhanced by the use of catalyst materials in cold and hot tower contacting zones. Water is employed in a closed liquid recirculation loop that includes the cold tower, in which deuter...
08/16/1983
4374116Method of combining gaseous hydrogen and oxygen and apparatus therefor
Gaseous hydrogen and oxygen are combined in an upwardly extending casing containing a catalytic assembly in an intermediate portion of the casing with means for distributing hydrogen gas in the catalytic assembly, distributing cooling water and oxygen fee...
02/15/1983
4331522Reprocessing of spent plasma
A process for removing helium and other impurities from a mixture containing deuterium and tritium, which process comprises the following steps: separating the isotopes of hydrogen from the impurity by catalytic oxidation; condensing out the oxides H...
05/25/1982
4228034Catalytically active mass for the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water
For the exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water, wherein the streams are at a temperature in the range 273 to 573K are brought into contact with one another and a catalytically active mass, an improved catalytica...
10/14/1980
4221774Isotope enrichment systems
A new combination is disclosed of (I) a process for producing a substance enriched in a desired isotope of hydrogen and/or oxygen from a flow of liquid substance, e.g. water which becomes depleted in its content of said isotope, and (II) replenishing the ...
09/09/1980
4217332Process for exchanging hydrogen isotopes between gaseous hydrogen and water
A process for exchanging isotopes of hydrogen, particularly tritium, between gaseous hydrogen and water is provided whereby gaseous hydrogen depeleted in tritium and liquid or gaseous water containing tritium are reacted in the presence of a metallic cata...
08/12/1980
4213953Process for the preparation of ammonia and heavy water
In order to replace the electricity required to drive the compressors of the apparatus, the nitrogen-producing means is supplied with a flow of a synthesis gas mixture from the synthesis circuit of the synthesizing plant. This gas mixture is burned with c...
07/22/1980
4192850Dual temperature exchange systems
Improvements in the dual temperature exchange system wherein the feed supply substance traverses selected portions of one of the two temperature zones, said selected portions being correlated with the availability and/or cost of a supply of the feed subst...
03/11/1980
4192847Thermal control in dual temperature systems
Apparatus for thermal control in dual temperature systems in which both liquid and gas are present together at different temperatures in different locations in the system. Hot humidified gases rather than being cooled with water are circulated in a cyclic...
03/11/1980
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