| On the rapid development of high-tech industries in all the world, because alkali metals rubidium and its compounds have the unique characteristic, it is widely used in optical, electronic, LED, solder flux and other materials. In all the world, Energy become little, in order to improve efficiency of fuel and save fuel everyday, we have to reduce environmental pollution.At the same time, it is necessary to seek a new method of energy conversion. And rubidium shows a bright future in the new energy conversion application. Therefore, the study on Rubidium of separation and extraction from Rb resource is of a great significance.Owing to the special application of Rubidium, the existence of Rubidium is very rare and dispersed, it is difficult to extract and separat Rubidium. The requirements of separation methods of rubidium are more and more important. It is an important separation and enrichment method which is Exchange method of Inorganic ion. The aim of the paper is construction of marine brine of Ping Luo Dam in Sichuan.We Explore the separation performance which uses inorganic-ion-exchange material of AMP to extract Rubidium from high Potassium brine.In this paper, we use the single factor method that index of assessment has been chosen by adsorption rate, separation factor, desorption rate. After considering the conditions of production and operation, the conditions of its adsorption and desorption is investigated.Comparing the separation performance of three inorganic ion exchange materials, which are ZrP, phosphoantimonic acid and AMP. The result shows that AMP has the best exchange capacity. Exchange capacity of AMP is 1.11 mmol/g, separation factor of AMP is 35.12. By the conditions of adsorption of investigating experiment, we obtain the best adsorption conditions with test method of single-factor static. Results are showed that: at room temperature, liquid composition is 1:1, the pH of the absorption solution is 7.0, the absorption time is 15h. Under such conditions, the adsorption rate of rubidium is 83.70%, the adsorption rate of potassium is 10.02%, separation factor of potassium and rubidium is 46.34. The effects of concentration of desorbed agent, pH of desorbed agent, desorbed time, desorbed temperature on desorption performance is investigated. And solution of ammonium chloride is used as the desorbed agent. The optimum desorption conditions for the desorption of rubidium with solution of ammonium chloride are as follows:at room temperature, the concentration of desorption solution is 20%, the pH of the absorption solution is 5.40, the absorption time is 6h. Under such conditions, the desorption rate of rubidium is 39.79%, the desorption rate of potassium is 58.27%.The original liquid is separated by two times, then the concentration of desorbed agent of Rubidium chloride is improved from 9.09%(it is The original liquid ) up to 84.74%, the result shows preliminary isolation of rubidium and potassium. In every separated experiment, desorbing AMP three time with ammonium chloride solution, the desorption rate of Rb is is improved from 33.00% up to 85.09%. In experiment, the loss of Rubidium is assessed quantitative.Although ammonium phosphate, one of an ion exchange material, has a higher adsorption capacity of rubidium and potassium, separation factor of rubidium and potassium is weak. During the desorption process, it is relatively difficult to desorp rubidium from ammonium phosphate. It needs further studying on how to improve desorption rate of rubidium in the exchange of adsorption and separation of process. |
PDF Full Text Request