Adsorbing material for efficiently and stably removing aldehydes in epoxypropane and preparation method of adsorbing material
A propylene oxide, stable technology, applied in the field of preparation of adsorption materials, can solve the problems of low adsorption efficiency, many by-products, easy breakage, etc., and achieve the effect of remarkable effect, mild conditions and simple operation
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Embodiment 1
[0033] The molar ratio of 1,3,5-tris(1-methylene-3-vinylimidazole)benzene and 1-vinyl-4-(chlorinated-N-methylene- N,N,N-tripropylamine)benzene under the action of 5 wt% ammonium chloride on the total mass of the substrate and under the action of 5 wt% (based on the total mass of the substrate) azobisisobutyronitrile in ethanol solution The reaction was heated at 60 °C for 3 h, and the obtained solid was then soaked in hydrochloric acid solution for activation for 24 h to obtain aldehyde removal adsorption material 1.
[0034] The infrared spectrum of the obtained material is as follows image 3 shown. can be found, 3300-3400 cm -1 The vibration peak of the tertiary amino group—N— appeared, indicating the successful introduction of abundant tertiary amino groups on the reaction monomer B; at about 1700 cm -1 There is a vibration peak that can be referred to as =N- on the imidazole group, which can be confirmed to be introduced by the imidazole group on the reaction monomer A...
Embodiment 2
[0040] Increasing 1,3,5-tris(1-methylene-3-vinylimidazolium chloride) benzene (i.e., reactive monomer A) will change the degree of crosslinking of the resulting material, thereby changing its specific surface area and adsorption properties.
[0041] The molar ratio of 1,3,5-tris(1-methylene-3-vinylimidazole)benzene and 1-vinyl-4-(chlorinated-N-methylene- N,N,N-tripropylamine)benzene under the action of 5 wt% ammonium chloride in the total mass of the substrate and under the action of 5 wt% (based on the total mass of the low substance) azobisisobutyronitrile in ethanol solution The reaction was heated at 60 °C for 3 h. After the reaction, the excess solvent was removed, and then activated by hydrochloric acid solution for 24 h to obtain the aldehyde-removing adsorption material 2.
[0042] The infrared spectrum of the obtained material is as follows Figure 4 shown. can be found, 3300-3400 cm -1 The vibration peak of tertiary amino group—N— appeared, indicating the successf...
Embodiment 3
[0048] Ammonium salts can control the solubility of reaction monomers by adjusting the Hansen solubility constant of the solvent, thereby increasing the degree of reaction polymerization and crosslinking. Moreover, increasing the amount of ammonium salt can increase the amine content of the material, thereby improving its ability to adsorb aldehydes using the principle of Mancini reaction.
[0049] The molar ratio of 1,3,5-tris(1-methylene-3-vinylimidazole)benzene and 1-vinyl-4-(chlorinated-N-methylene- N,N,N-tripropylamine)benzene under the action of 100 wt% ammonium chloride on the total mass of the substrate and 5 wt% (based on the total mass of the substrate) azobisisobutyronitrile in ethanol solution The reaction was heated at 60 °C for 3 h, and the obtained solid was activated by hydrochloric acid solution for 24 h to obtain aldehyde removal adsorption material 3.
[0050] The infrared spectrum of the obtained material is as follows Figure 5 shown. can be found, 3300...
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