Chlorocuprate ionic liquid modified molecular sieve, preparation method and application
An ionic liquid, cuprate technology, applied in separation methods, chemical instruments and methods, educts, etc., can solve the problems of affecting the stability of the adsorbent, easily destroying the molecular sieve framework, not easy to load, etc., and achieve stable performance, The effect of improving the frame structure, increasing stability and longevity
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Embodiment 1
[0030] (1) Synthesis of 1-butyl-3-methylimidazolium chlorocuprate chloride
[0031] Weigh 20 g of CuCl white powder into a three-necked flask, and slowly add concentrated hydrochloric acid dropwise until CuCl is completely dissolved to generate cupric acid. Then add 10g of 1-butyl-3-methylimidazole chloride crystals, add 80mL of deionized water until it is completely dissolved, under the protection of nitrogen atmosphere, react for 5h under magnetic stirring in a water bath at 40°C, stand at room temperature for 12h, the solution is layered , leaving the ionic liquid phase through a separatory funnel, and drying the ionic liquid under vacuum at 60° C. for 12 h to obtain 1-butyl-3-methylimidazolium chloride cuprate ionic liquid.
[0032] (2) Molecular sieve pretreatment
[0033] Weigh 10 g of 5A molecular sieve, add 1 mol / L hydrochloric acid with a volume of about 10 times the amount of molecular sieve, stir with a glass rod, soak for 12 hours, filter and wash with distilled w...
Embodiment 2
[0046] Replace the molecular sieve in the step (2) of Example 1 with a 13X type molecular sieve with a low silicon-to-aluminum ratio;
[0047] The mass ratio of ionic liquid to molecular sieve in step (3) was 0.3, and the calcination activation in step (3): the temperature was 200° C., and other conditions were the same as those in Example 1.
Embodiment 3
[0049] Replace the molecular sieve in the step (2) of Example 1 with a Y-type low-silicon-aluminum ratio molecular sieve;
[0050] The mass ratio of ionic liquid to molecular sieve in step (3) was 0.5, and the calcination activation in step (3): the temperature was 250° C., and other conditions were the same as those in Example 1.
[0051] Similarly, the chloride 1-butyl-3-methylimidazolium cuprate ionic liquid in step (3) of Example 1 can be replaced with trimethylamine cuprate, triethylamine cuprate, tripropylamine chloride Proton cuprous salt ionic liquids such as cuprate, 1-methylimidazolium chlorocuprate, 1-ethylimidazolium chlorocuprate, 1-ethylimidazolium bromocrate, 1-hexyl-3-methyl Aprotic cuprous salt ionic liquids such as imidazole cupric acid and N,N-dimethylaniline cupric cuprate, and more cupric acid ionic liquids with amines, pyridine, pyrimidine, thiophene, etc. as cores , the corresponding chlorocuprate ionic liquids are loaded on molecular sieves with NaA, 1...
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