44 results about "Isotope exchange" patented technology

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 reaction zone an enriched mixture comprising at least a compound containing the desired isotope, wherein the enriched mixture is enriched in the desired isotope above a natural abundance of the desired isotope, (c) reacting the enriched mixture in the cryogenic reaction zone thereby forming a resulting mixture containing the isotopically enriched compound, and (d) separating the resulting mixture into an enriched product which is enriched in the isotopically enriched compound and a depleted product which is depleted in the isotopically enriched compound.

The invention discloses a hydrogen isotope exchange membrane reaction assembly, comprising a palladium composite membrane tube, a corrugated stainless steel tube and an external sleeve, wherein a thermocouple sleeve is in a threaded connection with one end (close to the corrugated stainless steel tube) of the external sleeve and an osmosis gas outlet is mechanically welded at the other end of the external sleeve; a branch pipe serving as a hydrogen isotope exchange raw gas inlet is arranged at the upper end of the thermocouple sleeve; a tail gas outlet is formed at the upper end of the external sleeve and close to the corrugated stainless steel tube, and a carrier gas He and Q2O raw gas inlet is formed at the lower end of the external sleeve far and is away from the corrugated stainless steel tube. According to the hydrogen isotope exchange membrane reaction assembly disclosed by the invention, a small amount of combined deuterium and tritium can be displaced and separated out by using hydrogen isotope exchange reaction, and a part of products are separated in situ out of the system during reaction, so that very high conversion rate and decontamination factors are obtained, and the recovery rate of deuterium and tritium is improved; the hydrogen isotope exchange membrane reaction assembly can be used for treating high-concentration tritium water and treating plasma ash discharge gas in fusion reaction, and can also be used for industrially producing high-purity hydrogen.

The invention discloses a method and a system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride. With a small amount of commercially available bottled boron trifluoride as a material and a boron trifluoride / nitromethane or ether compound as a boron isotopes exchange working system, by cold-heat reflux at a concentration station and an extraction station in a cascade device, the boron trifluoride and a complex produced by the nitromethane or ether compound absorbing the boron trifluoride undego boron isotopes exchange, realizing the circulating reflux separation of boron-10 and boron-11. The system has a compact structure, is easy to operate, can be easily continuously automated, and not only greatly reduces the dosage of the boron trifluoride material, but also solves the problem of waste boron trifluoride discharge, moreover, energy consumption is reduced by about 80 percent, energy saving and zero discharge are realized, the production cost is greatly reduced, and the concentrations of the obtained boron-10 and boron-11 products are higher than or equal to 99 atom percent.

The invention provides a device and a method for evaluating activity of a hydrophobic catalyst through hydrogen isotope gas phase exchange. The device comprises a gas control unit, a water saturationunit, a catalytic reaction system, a sample collection unit and a temperature control system, wherein the water saturation unit comprises a primary water saturator and a secondary water saturator; thecatalytic reaction system comprises a reaction pipe; the sample collection unit comprises a condensation pipe for carrying out condensed collection on water samples containing deuterium and a cold trap for carrying out liquid nitrogen cooling and collection on the water samples containing the deuterium; the temperature control system consists of four independent temperature control units which are respectively used for controlling temperatures of the primary water saturator, the secondary water saturator, the reaction pipe and the condensation pipe. According to the device and the method disclosed by the invention, the hydrogen gas passes through the saturated deuterium-containing water, and performs gaseous hydrogen isotope exchange reaction on the catalyst bed, the deuterium-containingwater is collected by adopting backflow condensation and / or cold trapping, so that the content of the deuterium in the water before exchange is quantitatively analyzed through an infrared method, andthe catalytic performance of the catalyst is evaluated. The device and the method have the advantages that an operation is simple, and the device and the method are suitable for evaluating the performance of the catalyst in the experiment and research stage.