A kind of pure inorganic microporous desiccant and its synthesis method
A synthesis method and desiccant technology are applied in the field of inorganic microporous material desiccant, which can solve the problems of rare reports of heteropolyacid microporous materials, and achieve the effects of high molecular weight, broad application value and large molecular volume.
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[0024] A kind of synthetic method of pure inorganic microporous desiccant, comprises the following steps:
[0025] (1) Weigh 55mmol of Na 2 WO 4 2H 2 O 18.2g was placed in a 100mL beaker, dissolved in 30mL of distilled water, stirred at room temperature, and 16.5mL of 4.0M hydrochloric acid was added dropwise to prepare solution A;
[0026] (2) Weigh 5mmol Na 2 SiO 3 0.61g was dissolved in 10mL distilled water to prepare solution B;
[0027] (3) solution B is poured into solution A to obtain solution C;
[0028] (4) Under vigorous stirring, adjust the pH of solution C to 5.0-6.0 with 4.0M HCl, and then stir at room temperature for 100 min;
[0029] (5) Then, under electromagnetic stirring, 9.0 g of solid KCl was added to the solution of step (4), and a large amount of white solids were precipitated after 15 minutes, which were filtered by a vacuum pump, placed at room temperature and dried to obtain white solid KCl. 8 SiW 11 o 39 ;
[0030] (6) Weigh K with a weight...
Embodiment 2
[0040] The remaining conditions are the same as in Example 1, the difference is that in step (8), 4 mL of 2.0 MKCl aqueous solution is added dropwise at a rate of 50 drops per minute, stirred at room temperature for 30 min, filtered, and the filtrate is allowed to stand at room temperature for two days, and colorless square crystals are precipitated , and the yield was 84.2%.
Embodiment 3
[0042] The remaining conditions are the same as in Example 1, except that in step (8), 6 mL of 2.0 MKCl aqueous solution is added dropwise at a rate of 50 drops per minute, stirred at room temperature for 30 min, filtered, and the filtrate is allowed to stand at room temperature for two days, and a colorless square crystal is precipitated , and the yield was 84.5%.
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