Ammonium rhenate solution crystallization method
A solution crystallization, ammonium rhenate technology, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry and other directions, can solve problems such as low output of ammonium rhenate products, and achieve the effect of improving crystallization efficiency and increasing output
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Embodiment 1
[0007] Example 1: a) Put an ammonium rhenate solution with a temperature of 30°C and a concentration of 15g / L after evaporation and concentration in an open container; b) add ammonia to the ammonium rhenate solution, Adjust the pH value to 8; c) Use a blower to cool the ammonium rhenate solution to room temperature, and the ammonium rhenate solution will initially crystallize during the cooling process; d) place the ammonium rhenate solution in an environment with a temperature of -10°C for cooling, The cooling time is 6 hours; e) Take out the ammonium rhenate solution for solid-liquid separation to obtain the crude ammonium rhenate product.
Embodiment 2
[0008] Example 2: a) Put an ammonium rhenate solution with a temperature of 50°C and a concentration of 20g / L after evaporation and concentration in an open container; b) add ammonia to the ammonium rhenate solution, Adjust the pH to 9; c) Use a blower to cool the ammonium rhenate solution to room temperature, and the ammonium rhenate solution will initially crystallize during the cooling process; d) place the ammonium rhenate solution in an environment with a temperature of -8°C for cooling, The cooling time is 8 hours; e) Take out the ammonium rhenate solution for solid-liquid separation to obtain the crude ammonium rhenate product.
Embodiment 3
[0009] Example 3: a) Place an ammonium rhenate solution with a temperature of 90°C and a concentration of 30g / L after evaporation and concentration in an open container; b) add ammonia water to the ammonium rhenate solution, The pH value was adjusted to 11; c) The ammonium rhenate solution was blown and cooled to room temperature with a blower, and the ammonium rhenate solution was initially crystallized during the cooling process; d) The ammonium rhenate solution was placed in an environment with a temperature of 0℃ to cool down. The time is 12 hours; e) Take out the ammonium rhenate solution for solid-liquid separation to obtain the crude ammonium rhenate product.
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