Alkaline catalytic membrane
A catalytic membrane and alkaline technology, which is applied in the field of alkaline catalytic membrane, can solve the problems of complex ceramic membrane preparation process and high cost, and achieve the effect of large equipment volume and cost reduction
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Embodiment 1
[0028] 20.0g Na 2 SiO 3 Dissolve in 400.0 g of deionized water, add 8.0 g of linker epichlorohydrin, and stir magnetically at 50° C. for 4 hours. Add chitosan quaternary ammonium salt aqueous solution to this solution, wherein chitosan quaternary ammonium salt 16.0g, deionized water is 320.0g, magnetically stir at 75 ℃ for 2 hours, make epichlorohydrin and chitosan quaternary ammonium Salt cross-linking, while adding 4.0g NaOH to neutralize the generated HCl; then stand still to defoam, cast on a glass plate, and dry under vacuum (1.33kPa) in a vacuum oven at 50°C. Wash off unreacted epichlorohydrin, NaOH and excess physically adsorbed Na with ethanol 2 SiO 3 , and vacuum-dried at 50° C. to obtain a polymer film. Na was calculated by calcining and weighing at 500°C 2 SiO 3 The mass is 16.0g, and the polymer mass is 16.0g, which is Na 2 SiO 3 The mass ratio to the polymer is 1:1. By FTIR characterization, it was found that the basic catalytic membrane was at 1105 and 104...
Embodiment 2
[0031] 200.0g Na 2 SiO 3 Dissolve in 400.0 g of deionized water, add 80.0 g of linker epichlorohydrin, and stir magnetically at 90° C. for 2 hours. Add chitosan aqueous solution to this solution, wherein chitosan is 40.0g, deionized water is 888.9g, magnetically stirred at 50°C for 6 hours to crosslink epichlorohydrin and chitosan, and simultaneously add 4.0g The generated HCl was neutralized by NaOH, left to defoam, cast on a glass plate, and dried in a vacuum oven at 50° C. under vacuum (1.33 kPa). Ethanol washes away unreacted epichlorohydrin, NaOH and excess physically adsorbed Na 2 SiO 3 , dried in vacuum at 50°C. Na was calculated by calcining and weighing at 500°C 2 SiO 3 The mass is 160.0g, and the polymer mass is 20.0g, namely Na 2 SiO 3 The mass ratio to the polymer film is 8:1. The FTIR and TG characterizations proved that the solid base had been fixed on the polymer molecular chain through the linker.
[0032] 10.0 g of methanol was reacted with 5.0 g of ...
Embodiment 3
[0034] 100.0g Mg 6 al 2 (OH) 14 CO 3 4H 2 O was dissolved in 400.0 g of deionized water, 80.0 g of 50% glutaraldehyde aqueous solution was added, and magnetically stirred at 70° C. for 2 hours. Add polyethyleneimine aqueous solution to this solution, wherein polyethyleneimine is 20.0g, deionized water is 100.0g, magnetically stir at 50°C for 6 hours to cross-link glutaraldehyde and polyethyleneimine, and let it stand Degassing, cast on a glass plate, and dry in a vacuum oven at 50°C under vacuum (1.33kPa). Ethanol washes away unreacted glutaraldehyde and excess physically adsorbed Mg 6 al 2 (OH) 14 CO 3 , dried in vacuum at 50°C. Mg was calculated by calcining and weighing at 500°C 6 al 2 (OH) 14 CO 3 The mass is 60.0g, and the polymer mass is 20.0g, which is Mg 6 al 2 (OH) 14 CO 3 The mass ratio to the polymer film is 3:1. The FTIR and TG characterizations proved that the solid base had been immobilized on the polymer molecular chain by the linker.
[0035]...
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