Method for measuring the recovery of uranium on stainless steel at high conversion
A high conversion rate, stainless steel technology, applied in the field of solid-liquid reaction kinetics experimental research, can solve the problems that are not suitable for high conversion rate and difficult to achieve, and achieve the effect of reducing accuracy requirements and eliminating influence
Active Publication Date: 2016-01-20
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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Problems solved by technology
[0009] This is obviously difficult to achieve in many research fields
Therefore, the method of regularly sampling and analyzing the change of solution concentration to calculate the change of recovery rate is only suitable for solid-liquid reactions where the concentration changes significantly with time, and is not suitable for high conversion rates.
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[0038] Below in conjunction with accompanying drawing and embodiment the present invention is used for the measurement method of the recovery rate of uranium extraction on stainless steel under the high conversion rate and is described in detail:
[0039] Such as figure 1 Shown, a kind of method for measuring the recovery rate of extracting uranium on stainless steel under high conversion rate, comprises the following steps:
[0040] ⅰ. Solid-liquid reaction
[0041] Add 100mL of nitric acid solution with a concentration of 5mol / L into the reactor, and when the temperature of the solution reaches 100°C, add stainless steel material with uranium for solid-liquid reaction (S1);
[0042] ⅱ. Primary solid-liquid separation
[0043] After reacting for 90 minutes, quickly carry out solid-liquid separation to separate the remaining unreacted stainless steel material and solution (S2);
[0044] ⅲ. Solid surface cleaning
[0045] Wash the surface of the separated unreacted stainles...
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The invention discloses a method for measuring the recovery rate of uranium on stainless steel extracted at high conversion rate, comprising the following steps: solid-liquid reaction, primary solid-liquid separation, solid surface cleaning, secondary solid-liquid separation, mixing, aqua regia Dissolution, isotope dilution mass spectrometry measurements and recovery calculations. The method for measuring the recovery rate under high conversion provided by the present invention can eliminate the influence of solution evaporation on the liquid volume estimation during the reaction process, the influence of uneven concentration in the solution on sampling, and reduce the factors that are difficult to control in experiments. influences. At high conversion rate, the accuracy requirements of the measurement method are reduced, and the small change of recovery rate with time can be measured, so as to obtain the kinetic law under high conversion rate.
Description
technical field [0001] The invention belongs to the experimental research field of solid-liquid reaction kinetics, in particular to a method for measuring the recovery rate of uranium extracted from stainless steel under high conversion rate. Background technique [0002] Kinetics is the science of studying the process rate. Through kinetic experimental research, the net result, average rate and reaction process of the reaction after a certain period of time can be understood, and the kinetic equation can be obtained to provide a design basis for optimizing the process, increasing the yield and reducing consumption. . At present, kinetic experimental research has been widely carried out in ore leaching, drug extraction, chemical engineering and other fields. In the usual kinetic process, although the derivation process is complex and cumbersome, and the kinetic equations obtained are complicated and diverse, the relationship between the reaction recovery rate α and the reac...
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IPC IPC(8): G01N27/62
Inventor 赵刚于震孙亮
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND