A kind of preparation method of strontium selective adsorbent
A selective, adsorbent technology, used in chemical instruments and methods, radioactive purification, other chemical processes, etc., can solve problems such as troublesome curing treatment, and achieve the effects of simple steps, strong salt resistance, and high selectivity
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Embodiment 1
[0025] A preparation method of strontium selective adsorbent, the method comprises the following steps:
[0026] Present embodiment prepares 1Kg adsorbent and has used 2.64Kg C 16 h 36 o 4 Ti, 0.84Kg Si(OC 2 h 5 ) 4 And 1.4L ethanol, the specific steps are:
[0027] To 0.1mol / L NaOH solution, dropwise add C 16 h 36 o 4 Ti, Si(OC 2 h 5 ) 4 And the organic mixture composed of ethanol, the C in the organic mixture 16 h 36 o 4 Ti and Si(OC 2 h 5 ) 4 The ratio of the amount of substances is 2:1, while NaOH and C 16 h 36 o 4 The ratio of the amount of Ti to the substance is 1:1; the droplet velocity of the machine-mixed liquid is 81.33mL / min, and the reaction time is not less than 2h; continuous stirring is required during the reaction. After the reaction is completed, filter and wash to obtain a white paste, and the white The paste was subjected to freeze-thaw dehydration treatment for 3 times, each time the freezing temperature was ~10°C for 2 hours, and the pa...
Embodiment 2
[0031] Different from Example 1, C 16 h 36 o 4 Ti and Si(OC 2 h 5 ) 4 The ratio of the amount of substances is 1:2; the concentration of NaOH solution is 0.05mol / L; NaOH and C 16 h 36 o 4 The molar ratio of Ti was 1:2; the dropping rate of the organic mixture was 70mL / min; the obtained white paste lost water by freezing and thawing 4 times, the freezing time was 3 hours, and the temperature was -6°C.
Embodiment 3
[0033] Different from Example 1, C 16 h 36 o 4 Ti and Si(OC 2 h 5 ) 4 The ratio of the amount of substances is 3:1; the concentration of NaOH solution is 0.15mol / L; NaOH and C16 h 36 o 4 The molar ratio of Ti was 1:4; the dropping rate of the organic mixture was 90mL / min; the obtained white paste lost water twice by freezing and thawing, the freezing time was 4 hours, and the temperature was -4°C.
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