230results about "Isotope separation" patented technology

The invention discloses a preparation method and application of a membrane separation material based on external field enhanced water isotope separation. The preparation method comprises the following steps: firstly, pre-enriching a precursor component containing a polymerizable monomer, a cross-linking agent and a photoinitiator in a confinement pore channel of a nano-porous carrier through an impregnation-encapsulation strategy; and then, through in-situ photo-initiation polymerization, a covalent cross-linked functional polymer network is constructed in the pore channel, and stable packaging of the polymer is realized. In the water isotope separation period, external field conditions are regulated and controlled, the molecular conformation of a polymer chain is accurately controlled, and the separation performance is optimized. According to the invention, by virtue of an external field strengthening technology, the intramolecular / intermolecular interaction is destroyed, and the macromolecular chain is converted from contraction to stretching, so that more functional sites are exposed, and the water isotope separation material designed by the invention has a huge practical application prospect.

The invention relates to the technical field of metal organic framework materials (MOF) and isotope separation, in particular to a functionalized metal organic framework material for water / heavy water separation and a preparation method and application thereof. The metal organic framework material is a porous crystal material which is formed by coordination self-assembly of metal ions and V-shaped organic ligands and has a periodic network structure; the V-shaped organic ligand is a V-shaped dicarboxylic acid organic ligand modified by an oxygen-containing functional group designed through topological functionalization. According to the metal organic framework material, through topological functional design of a V-shaped organic ligand, a space confinement channel and a high-density oxygen active site are integrated in the same MOF material, and an ideal model system is provided for identification of water isotopes; according to the metal organic framework material, the framework structure flexibility, the pore channel confinement effect and the molecular recognition capability can be synergistically regulated and controlled, so that efficient recognition and separation of water / heavy water are realized.

The invention belongs to the field of medical isotope separation and preparation, and particularly relates to a method for separating and purifying < 212 > Pb from a thorium solution, which comprises the following steps: 1) leacheate is introduced into a Pb selective adsorption column to pretreat the Pb selective adsorption column, and then < 232 > Th salt solution and leacheate are introduced in sequence; 2) continuously introducing a desorption solution into the Pb selective adsorption column, enabling the desorption solution passing through the Pb selective adsorption column to flow into the Th selective adsorption column, and collecting the outflowing desorption solution; a desorption solution only containing 212Pb is obtained; according to the method, the 212Pb in the high-concentration thorium solution can be separated and purified at the same time. While < 232 > Th impurity entrainment and pollution in a < 212 > Pb product are remarkably reduced, compared with a single-column process, the separation time is basically not increased. The separated 212Pb product has high radionuclide purity and chemical purity at the same time, and can meet related pharmaceutical requirements.

The invention discloses a process and a control method for continuous separation of hydrogen isotopes, and belongs to the technical field of hydrogen isotope separation. According to the process, a countercurrent continuous operation mode is adopted, an adsorption tower is divided into an adsorption area, a replacement area and a regeneration area, and reverse movement of an adsorbent and a material is simulated by periodically switching the material inlet and outlet positions of the adsorption tower; the adsorption towers and connecting pipelines are soaked in a constant-temperature coolant, and separation is realized by virtue of acting force difference of an adsorbent on hydrogen isotopes; according to the control method, digital control logic is adopted, the valve state is edited through a spreadsheet, software is controlled to analyze data, a PLC executes valve switching, and accurate regulation and control of the multi-tower operation state under different working conditions are achieved. The method provided by the invention solves the problems of high equipment investment and large energy consumption of a traditional separation method, has the advantages of high separation factor, high recovery rate and stable continuous operation, and is suitable for hydrogen isotope separation requirements of different feed gas proportions and different treatment capacities.

The invention belongs to the technical field of radioactive metal isotope ion chromatographic separation, and discloses a medical radioactive isotope purification multichannel ion liquid chromatography system. The system comprises an automatic sample injection system, a parallel sampling and leaching channel, a parallel multi-column chromatographic structure, an online radiation dose monitoring module, a multi-channel tail end detection system, a recycling structure and a central control system. By adopting a full-automatic sample injection and multi-channel parallel chromatography structure, parallel separation, real-time radiation monitoring, multi-mode online detection and closed-loop recovery are realized, and the problems of insufficient nuclear purity, low separation efficiency, low target recovery rate and high radiation exposure of a traditional method are solved.

The present application relates to a kind of tritium separation method of tritium-containing wastewater and its reactor system, application, the tritium separation method of tritium-containing wastewater of the present application is ultraviolet irradiation promotes separation method, comprising: step 1) tritium-containing wastewater is introduced into the reaction containment of reactor system and is contacted with adsorption material to form liquid-solid two-phase contact system, step 2) after ultraviolet light is irradiated to liquid-solid two-phase contact system, make tritium enrich in adsorption material;Step 3) after the liquid-solid two-phase contact system of irradiation is completed, solid-liquid separation is obtained to low concentration tritium treatment water and tritium-rich adsorption material.The method of the present application is irradiated by ultraviolet light, accelerates hydrogen / tritium isotope exchange and adsorption process, can obtain higher tritium removal rate and adsorption amount under the same processing time.The present application belongs to energy-saving and environmental protection industry, especially in wastewater environmental control and nuclear pollution wastewater treatment in the environmental protection application of the recovery treatment of nuclear radioactive pollution elements plays a key role.

The invention relates to the technical field of neon isotope separation, and discloses a neon isotope separation system and method.The neon isotope separation system comprises a neon gas tank, a supercharger, a first-stage heat exchanger, a second-stage heat exchanger, a mixing refrigerator and a multi-stage rectifying tower, and cold neon discharged from the top of the rectifying tower except the first-stage rectifying tower is subjected to heat exchange through the second-stage heat exchanger and the first-stage heat exchanger and then flows back to the supercharger, and the cold neon is effectively used as a refrigerant to cool neon. And then part of neon cooled by the first-stage heat exchanger is shunted into the reboiler of the multi-stage rectifying tower, the temperature of the neon in the rectifying tower is adjusted, separation of 20Ne and 22Ne is promoted, neon branches in the reboiler converge with neon branches cooled by the second-stage heat exchanger, heat in neon at different stages can be fully utilized, and energy consumption is reduced. The neon cooled by the first-stage heat exchanger is used for heat exchange and temperature adjustment of the neon in the rectifying tower, the temperature difference between the neon and the neon is not too large, the temperature of the neon in the rectifying tower can be effectively and finely adjusted, and then separation of isotopes 20Ne and 22Ne at the low temperature is promoted.

This invention discloses a Th / Ra generator containing natural thorium and its production. 224 The Ra method. The generator of this invention includes a cation exchange resin column and bottles I to VI; wherein bottle I is filled with the stock solution; bottle III is filled with deionized water; bottle IV is filled with 4.0–6.0 M nitric acid; bottles II, V, and VI are empty; bottle V is a specially designed collection bottle with an extraction resin column at its opening for collection. 224 Ra. The method of the present invention includes the following steps: 1) using a mixture containing 228 1) A natural thorium mixture of Th and Ra was concentrated to obtain a concentrate, and then the pH of the system was adjusted to serve as the packing stock solution for the Th / Ra generator; 2) The stock solution was passed through a cation exchange resin column to obtain a cation exchange resin column loaded with thorium. 224 Ra, and collect the eluent from the original solution for later use; 3) Elute the cation exchange resin column with inorganic acid. 224 Ra, then the eluent is collected using a special collection bottle to obtain... 224 Ra. This invention enables the separation, purification, and recycling of [product name]. 224 Ra, to overcome 228 Th / 224 The Ra generator has a stringent loading process to avoid the radioactive risks associated with handling tons of natural thorium.

The invention comprises a catalyst device (1) for hydrogen isotope exchange analysis, wherein the catalyst device (1) consists of a catalyst carrier (10) and a catalyst material (20) applied to a surface (12) of the carrier (10), wherein at least the carrier surface (12) consists of an inorganic material and the catalyst material is sputtered or electrodeposited on at least a part of the surface (12) of the carrier (10). The invention further pertains to a sample vessel (100) for hydrogen isotope exchange analysis, wherein the sample vessel (100) contains one or more catalyst devices (1) according to the invention, wherein a maximum outer diameter (D) of the catalyst device (1) is smaller than a minimum inner diameter (101) of an opening of the sample vessel (100) or of the sample vessel (100) itself. The invention also foresees a method of hydrogen isotope analysis employing the sample vessel (100) and the use of the catalyst device (1) in a method of hydrogen isotope analysis.

The invention discloses a hierarchical pore UiO-66 supported crown ether composite material, a preparation method thereof and application of the hierarchical pore UiO-66 supported crown ether composite material in adsorption and extraction of 6Li < + > from complex systems such as salt lake brine. The preparation method comprises the following steps: preparing terephthalic acid, 2-aminoterephthalic acid and a zirconium source through a solvothermal method to obtain a mixed ligand UiO-66, and then pyrolyzing the mixed ligand UiO-66 in an air atmosphere to obtain the hierarchical pore UiO-66; the hierarchical pore UiO-66 and a crown ether solution are mixed and stirred to react for a period of time, then solid-liquid separation is carried out, solids are collected, and the hierarchical pore UiO-66 loaded crown ether composite material is obtained after cleaning and drying. The hierarchical pore UiO-66 loaded crown ether composite material has the advantages of high specific surface area, high dispersion of crown ether adsorption sites, high crown ether loading capacity, high selectivity of 6Li < + > metal ions and the like, and can realize one-step enrichment of 6Li < + > metal ions in complex systems such as salt lake brine.

This invention relates to the field of medical radioisotope manufacturing technology, and more particularly to a method based on proton beam irradiation. 232 Th target production 212 The method for Pb. The present invention provides a method based on proton beam irradiation. 232 Th target production 212 The method for treating Pb includes the following steps: irradiation with a proton beam. 232 Th target production 228 Th; Dissolved using a mixture of acid and water 232 Th target, allowed to stand, yields the first Th solution; separation from the first Th solution or the pretreated first Th solution... 212 Pb. This invention employs proton beam irradiation. 232 The Th target material method will significantly improve 228 The content of Th was thus significantly increased. 212 The increased production efficiency of Pb fundamentally solves the problems of low output and high cost associated with traditional methods.

To provide a deuterium recycling method and recycling apparatus that can recover and recycle deuterium (D2) contained in exhaust gases emitted from processes utilizing deuterium. [Solution] A method for recycling deuterium, comprising: a recovery step of recovering exhaust gas containing light hydrogen (H2) and deuterium, which is discharged from a process utilizing deuterium (D2), by contacting it with an adsorbent capable of adsorbing them; and a desorption step of desorbing light hydrogen and deuterium from the adsorbent. The desorption step includes a light hydrogen separation step carried out under a first condition in which light hydrogen is preferentially desorbed from the adsorbent, and a deuterium separation step carried out under a second condition in which deuterium is preferentially desorbed from the adsorbent. The method for recycling deuterium according to this disclosure includes a step of supplying the gas containing deuterium obtained in the deuterium separation step as a raw material gas in the process.

A gas separation device for separating and containing various types of gases from a collection chamber based on different atomic masses is disclosed. The chamber is connected to an ion diverter by a valve that, when opened, allows various types of gases to migrate from the collection chamber to an ionizer in which the gases are ionized. The ionized gas is accelerated by the ion accelerator and distributed into the ion deflector. The ion deflector includes a magnetic field within a channel defined by a pair of split-pole magnets. The trajectory of the ions is based on the ion mass of the separated ions. A plurality of collectors are located at different locations on the exit side of the ion deflector for receiving different ions moving along respective trajectories.

The invention provides a conductivity abnormity early warning method and system for radioactive column separation, and relates to the technical field of data processing, and the method comprises the steps: collecting an original conductivity time sequence signal of leacheate in a radioactive column separation process, and carrying out the preprocessing of the original conductivity time sequence signal, and obtaining a denoised reconstructed conductivity signal; the de-noised reconstructed conductivity signals are disassembled into intrinsic mode components, and instantaneous energy and sensitive components of the intrinsic mode components are calculated to obtain a characteristic mode signal set; according to the method, through fusion of modal characteristic analysis of the conductivity signal and spatial correlation verification of multiple ultrasonic parameters, interference introduced by environmental and medium physical property changes is filtered out, and recognition and early warning of early fine abnormal trends in the radioactive column separation process are achieved.

The application discloses application of a titanium carbide loaded osmium metal hydrogen evolution and deuterium evolution catalyst in water electrolysis separation of hydrogen isotopes, the carrier of the hydrogen evolution and deuterium evolution catalyst is titanium carbide, the active component is osmium metal loaded on the carrier, and the loading amount of the osmium metal is 7-15% of the mass of the carrier. The hydrogen isotope separation efficiency is improved by improving the composition and structure of the hydrogen evolution and deuterium evolution catalyst. The osmium metal is loaded on the titanium carbide base, the hydrogen evolution selectivity is improved and the energy consumption is reduced through strong mutual action of the metal-carrier.

The present invention relates to the field of distillation of isotopes by means of distillation columns. It is an object of the present invention to describe an innovative distillation column providing a significant improvement to the prior art. In particular, the distillation column will be a modular column with the innovative idea of any height required.

The invention discloses an application of a titanium carbide loaded osmium metal hydrogen evolution and deuterium evolution catalyst in water electrolysis separation of hydrogen isotopes, a carrier of the hydrogen evolution and deuterium evolution catalyst is titanium carbide, an active component is osmium metal loaded on the carrier, and the loading amount of the osmium metal is 7-15% of the mass of the carrier. The hydrogen isotope separation efficiency is improved by improving the composition and the structure of the hydrogen and deuterium evolution catalyst. Osmium metal is loaded on a titanium carbide substrate, and hydrogen evolution selectivity is improved and energy consumption is reduced through strong interaction of metal and a carrier.

The invention relates to a gaseous hydrogen isotope separation device and system and a gaseous hydrogen isotope separation method, and belongs to the technical field of hydrogen isotope separation. The gaseous hydrogen isotope separation device comprises an anode gas diffusion layer, an anode catalyst layer, a proton exchange membrane, a cathode catalyst layer and a cathode gas diffusion layer which are sequentially stacked; the anode gas diffusion layer and the anode catalyst layer are positioned in an anode region of the gaseous hydrogen isotope separation device, and the cathode catalyst layer and the cathode gas diffusion layer are positioned in a cathode region of the gaseous hydrogen isotope separation device; the gas inlet and the first gas outlet are formed in the anode region; the second gas outlet is formed in the cathode region; the gas inlet is used for being communicated with hydrogen isotope mixed gas; the anode region is connected with the anode of a power supply, and the cathode region is connected with the cathode of the power supply. According to the device, the hydrogen isotope mixed gas can be rapidly separated, the separation factor of the gaseous hydrogen isotope is high, and the separation effect is good.

The present disclosure relates to an automated device and methods to produce a highly purified alpha-emitting radioisotope Pb-212 from a pre-filled column of a parent isotope Ra-224 for use in targeted alpha-particle therapy.

The invention discloses a high and low temperature control device for krypton-85 temperature swing adsorption separation in the atmosphere. The high and low temperature control device comprises a refrigerating machine, a helium compressor, a vacuum chamber, a vacuum pump, an activated carbon adsorption trap, a heating piece, a heat insulation piece and an adjusting assembly. The refrigerating machine is mounted on the vacuum chamber, a cold head of the refrigerating machine extends into the vacuum chamber, and the refrigerating machine is connected with the helium compressor; the adjusting assembly is arranged in the vacuum chamber, the heat insulation part is arranged on the adjusting assembly, the heating part is arranged on the heat insulation part and fixedly connected with the activated carbon adsorption trap, the activated carbon adsorption trap is arranged opposite to a cold head of the refrigerator, and the adjusting assembly drives the activated carbon adsorption trap to be attached to or separated from the cold head of the refrigerator; the vacuum pump is communicated with the vacuum chamber. The high and low temperature control device is simple in structure, and high and low temperature control in the krypton-85 temperature swing adsorption separation process can be rapidly and effectively achieved.

The utility model discloses an isotope separation and purification column frame which comprises a limiting disc, an inserting disc and a stand column, the limiting disc can rotate on the outer side of the stand column; a plurality of strip-shaped grooves are formed in the limiting disc in the circumferential direction, and a plurality of inserting holes corresponding to the strip-shaped grooves are formed in the inserting disc; connecting holes corresponding to the inserting holes are formed in the waste liquid collecting box, and guide pipes are connected between the connecting holes and the corresponding inserting holes; and a high-pressure spray head is arranged at the upper end of the hollow guide pipe, extends to the upper end of the limiting disc and corresponds to one strip-shaped groove. According to the utility model, the residual liquid in the separation column directly drops into the waste liquid collection box, so that the chemical residual liquid is prevented from being exposed; the separation column can be cleaned without being picked up and transferred.

The present invention relates to a method of carbon-13 isotope (13C) enrichment, the method comprising: (i) applying a voltage to a cathode located in a cathode chamber of an electrochemical cell; (ii) flowing a feed stream comprising CO2 to the cathode chamber, wherein the feed stream contacts the cathode causing reduction of CO2 to form one or more products; and (iii) unreacted CO2 leaving the cathode chamber, the unreacted CO2 being enriched in 13C as compared to the CO2 in the feed stream, wherein n(13CO2) / (n(13CO2)+ n(12CO2)) in the unreacted CO2 is higher than n(13CO2) / (n(13CO2)+ n(12CO2)) in the feed stream, n representing molar amount; wherein the voltage is about 1.5 V to about 5.5 V, and flow rate of the feed stream is selected to provide a residence time of about 0.1 seconds to about 5 seconds in the cathode chamber.

The invention relates to a deuterium water conversion and purification system, and belongs to the technical field of isotope separation and purification. The system comprises a deuterium gas supply unit, a deuterium gas electrochemical reaction conversion unit, a multi-stage condensation separation purification unit and a deuterium water storage unit. On the basis of deuterium gas supply pressure, non-stop automatic switching is triggered, and deuterium gas non-backflow control is executed through a backflow blocking mechanism; generating electric energy and tail gas containing deuterium water vapor based on continuously supplied deuterium gas and a drying oxidant; a gradient gas-liquid separation process and a closed-loop temperature control regulation mechanism are adopted to obtain primarily purified liquid deuterium water, and high-purity deuterium water is generated through a high-selectivity ion exchange adsorption process; and obtaining deuterium water storage capacity data and conductivity parameters, analyzing the deuterium water storage capacity data and the conductivity parameters with a preset conductivity parameter threshold value, and triggering purification material regeneration reminding. The system realizes collaborative linkage of deuterium gas supply, conversion, purification and storage monitoring, and ensures the continuity and purity stability of deuterium water preparation.

The application discloses a kind of based on MXene interlayer structure composite membrane separation material and preparation method thereof.Material includes porous substrate as bottom film and the mass ratio of porous Mxene monolayer nanosheet, two-dimensional material nanosheet, porous MXene monolayer nanosheet and two-dimensional material nanosheet on porous substrate is 1:(1-10);Preparation method is that two-dimensional material nanosheet solution is extracted and filtered and deposited in porous substrate to form bottom film, MXene nanosheet solution is extracted and filtered and deposited to form middle layer, two-dimensional material nanosheet solution is extracted and filtered and covered on surface to obtain interlayer structure MXene composite separation film.The preparation method of the application is simple, raw material cost is low and green, realizes the effective separation of deuterium water and other hydrogen compounds, enhances the anti-swelling performance of membrane, provides a large number of adsorption sites, and enhances selectivity.

The utility model discloses an adjustable supporting device, which relates to the technical field of isotope separation and purification, and comprises a supporting rod, the bottom end of the supporting rod is rotatably connected with a chassis, the outer wall of the supporting rod is symmetrically provided with two supporting trays, the inner sides of the two supporting trays are both provided with fixing rings, and the fixing rings are connected with the chassis. A limiting ring is integrally formed on the outer wall of the fixing ring, the supporting trays are slidably connected to the outer wall of the limiting ring in a sleeving mode, the fixing ring is slidably connected to the outer wall of the supporting rod in a sleeving mode, and an adjusting mechanism used for independently adjusting the heights of the two supporting trays is arranged on the supporting rod. Through the adjusting mechanism, the supporting tray can be conveniently moved and positioned, so that the height of the supporting tray can be conveniently adjusted according to the column lengths of different isotope separation columns, and the supporting tray can be conveniently clamped and locked before and after the adjustment; and therefore, displacement of the supporting tray in the using process can be prevented.

The invention belongs to the technical field of isotope recovery and separation, and discloses a method for recovering high-abundance C13 carbon dioxide from C13 urea based on acidic constant-temperature hydrolysis. According to the method, the hydrolysis rate of the C13 urea is maintained by selecting proper dilute sulfuric acid concentration, sulfate radicals and urea are prevented from forming an adduct by controlling the dilute sulfuric acid concentration, the release efficiency of the 13CO2 is increased, the reaction rate is controlled, and side reaction is avoided. The invention further provides a set of reaction device for recycling 13CO2 through acidic constant-temperature hydrolysis of C13 urea under reduced pressure, the gas-liquid phase contact area and residence time are remarkably increased by arranging the rectifying column, visual water removal and low temperature are realized through the water removal column and the condenser pipe, the problems of external CO2 pollution, high impurity air content and relatively high water content are solved, and the method is suitable for industrial production. And high abundance recovery of the 13CO2 is ensured.

A method for purifying particles generates charged particles from a sample, measures at least one of mass, charge magnitude, and mobility of the generated charged particles, and selectively passes each of the measured charged particles having at least one of: (a) a measured mass equal to a selected mass or within a selected range of particle masses, (b) a measured charge magnitude equal to a selected charge magnitude or within a selected range of charge magnitudes, (c) a mass-to-charge ratio equal to a selected mass-to-charge ratio or within a selected range of mass-to-charge ratios, and (d) a measured mobility equal to a selected mobility or within a selected range of mobilities, to a particle collection target. In some embodiments, the collected particles can be harvested and expanded.

The invention provides a system for producing deuterium-rich water by combining chemical exchange and liquid ammonia rectification, which comprises an ammonia A2 storage unit, an ammonia water exchange device, a liquid ammonia rectification device and a water ammonia exchange device, and three processes of ammonia water exchange, liquid ammonia rectification and water ammonia exchange are coupled and connected in series to construct a complete hydrogen isotope (deuterium) enrichment path. According to the path, deuterium is efficiently transferred from high-boiling-point raw water to a low-boiling-point ammonia medium through ammonia water exchange, low-energy-consumption and high-magnification deuterium enrichment is achieved in an N-stage rectifying tower through liquid ammonia rectification by means of the low-boiling-point characteristic of liquid ammonia, and finally high-deuteration-degree ammonia is efficiently converted back to high-deuteration-degree deuterium-enriched water through reverse water ammonia exchange. Cooperative transmission of the material flow and the isotope flow is obviously optimized, and directional and step-by-step enrichment of deuterium in the material flow process is achieved.

To provide a light water adsorbent that can selectively adsorb light water.SOLUTION: An adsorbent 1 adsorbs light water. The adsorbent 1 is made of titanate. The titanate has a structure in which a plurality of host layers 2 in which octahedron having six oxygen atoms coordinated in titanium atoms are chained to be formed by oxygen atom-bond in a two-dimensional direction are laminated thereon and sodium ions 3 are arranged between the host layers 2. Portions of titanium sites in the host layers 2 are replaced with monovalent-trivalent cations (α). A decrease rate of mass on heating in a temperature range of 120°C-200°C at the time when the titanate is heated from 40°C up to 200°C at a rate of temperature increase 10°C / minute under a nitrogen stream is 0.5 mass% or less.SELECTED DRAWING: Figure 1

The invention discloses a C13 carbon dioxide purification device and method. The C13 carbon dioxide purification device comprises a decomposition kettle, an organic matter removal tank, a freezing tank and a steel cylinder which are communicated in sequence. The 13CO2 containing the organic amine obtained by decomposition in the decomposition kettle is subjected to organic amine removal, water vapor removal and freezing and filled into the steel cylinder, the technological process is simple, convenient and rapid, continuous production can be achieved, and the 13CO2 product with the purity larger than 99.5% is obtained.