A kind of method for deep purification and potassium removal of ammonium perrhenate solution
A technology of ammonium perrhenate and deep purification, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry, etc., can solve the problems of high production cost, difficulty in potassium removal, long process flow, etc., and achieve the effect of large saturation capacity
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[0038] Step 1. Preparation of ammonium perrhenate solution
[0039] The thick ammonium perrhenate product is dissolved in high-purity water to form an ammonium perrhenate solution, and an alkaline substance is used to adjust the pH value of the ammonium perrhenate solution to be alkaline, and the alkaline substance is not easy to use NaOH, KOH, Ca( OH) and other alkalis that are easy to introduce metal ions, preferably high-grade pure ammonia water or high-purity ammonia gas, to avoid the secondary introduction of impurity metal ions, and the pH value of the ammonium perrhenate solution is preferably adjusted to 8-11. The pH of the ammonium perrhenate is easy to cause the volatilization of ammonia to deteriorate the working environment, and the lower pH is easy to increase the loss of rhenium in the evaporation and crystallization process of ammonium perrhenate after purification. The size of the precision filter cloth is not less than 2000 mesh. It is worth noting that the sm...
Embodiment 1
[0054] Step 1. Preparation of ammonium perrhenate solution
[0055] Dissolve 30 grams of 99.0% qualified crude ammonium perrhenate product in 4L of high-purity water to form an ammonium perrhenate solution, adjust the pH of the ammonium perrhenate solution to about 8 with high-grade pure ammonia water, and then use a 2000-mesh precision filter cloth The solution is vacuum filtered to remove fine particulate solid impurities, and the obtained filtrate is used for the next step to remove potassium ion impurities.
[0056] Step 2. Selective deep adsorption and removal of potassium ions in ammonium perrhenate solution
[0057] First add 100ml of the new molecular recognition cationic resin into a 500ml beaker, add 100ml of high-purity water to fully swell for 2 hours, filter and wash with a 60-mesh 316L sieve after the swelling is completed, and then filter the resin with 10% dilute ammonia water prepared with high-grade pure ammonia water Alkali leaching transformation for 48 hour...
Embodiment 2
[0064] Step 1. Preparation of ammonium perrhenate solution
[0065] Dissolve 100 grams of 99.0% first-grade ammonium perrhenate in 2.5L of high-purity water to form an ammonium perrhenate solution, and use high-purity ammonia gas to adjust the pH of the ammonium perrhenate solution to about 11 through an air distributor, and then use 8000 The solution is vacuum filtered with a mesh precision filter cloth to remove fine particulate solid impurities, and the obtained filtrate is used for the next step to remove potassium ion impurities.
[0066] Step 2. Selective deep adsorption and removal of potassium ions in ammonium perrhenate solution
[0067] First add 50ml of the new molecular recognition cationic resin into a 200ml beaker, add 100ml of high-purity water to fully swell for 10h, filter and wash with a 60-mesh 316L sieve after the swelling, and then filter the resin with 8% dilute ammonia water prepared with high-grade pure ammonia water Alkali leaching transformation for ...
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