Boron selective gel adsorbent containing polyhydroxy functional groups, preparation and application thereof

[0030] Γ-glycidoxypropyltrimethoxysilane and ethyl orthosilicate were selected as the organic silicon raw materials, and N-methylglucamine was selected as the compound containing polyhydroxyl groups.

[0031] Weigh 19.5g of N-methylglucamine and 24mL of γ-glycidoxypropyltrimethoxysilane in 100mL of N,N-methylformamide solvent, stir and react at 50~80℃ for 4h to obtain Hydroxyl functional group gel precursor. The obtained gel precursor was washed with ethanol and dried at 30°C to obtain 112 g of solid which can be used for the synthesis of gel adsorbent. The preparation process of the polyhydroxy-containing gel precursor is as follows:

[0032]

[0033] Among them GPTMS-γ-glycidoxypropyl trimethoxysilane

[0034] MG-N-Methyl Glucosamine

[0035] W-gel precursor

[0036] DMF——N,N-Methylformamide

[0037]Dissolve the gel precursor prepared above in 50 mL of water, add 50 mL of tetraethyl orthosilicate, and stir continuously. After the system is uniform, add 10 mL of 2mol / L hydrochl...

[0043] Choose γ-glycidoxypropyltrimethoxysilane and ethyl orthosilicate as the gel raw materials, and N-methylglucosamine as the compound containing polyhydroxy groups. The gel is obtained first and then the polyhydroxy compound is used. The reaction method prepares the adsorbent.

[0044] Mix 24mL of γ-glycidoxypropyltrimethoxysilica with 50mL of ethyl orthosilicate and 50mL of water. After the system is uniform, add 10mL of 2mol / L hydrochloric acid, stir and hydrolyze for 2h, add 10mL of 5mol / L of ammonia, Stir vigorously until it is gelled and age it for 12h, dry at 30℃, pulverize through a 20-60 mesh sieve, then wash several times, and then dry at 30℃, the obtained dry gel is used to prepare polyhydroxy functional groups Boron selective gel adsorbent.

[0045] The obtained gel and 19.5g N-methylglucosamine were stirred and reacted at 50~80℃ for 4h in 100mL N,N-methylformamide solvent to obtain a gel containing polyhydroxy functional groups, which was washed with ethanol , Drie...

[0048] Γ-(methacryloyloxy)propyl trimethoxy silicon and ethyl orthosilicate were selected as the organic silicon raw materials, and glucosamine was selected as the compound containing polyhydroxyl groups.

[0049] Weigh 18.0g glucosamine and 23.8mL γ-(methacryloyloxy)propyl trimethoxy silicon, and stir and react for 4h at 70~110℃ in 100mL N,N-methylformamide solvent to obtain Gel precursor containing polyhydroxy functional groups. The obtained gel precursor was washed with ethanol and dried at 30°C to obtain 108 g of solid, which can be used for the synthesis of gel adsorbent. The preparation process of polyhydroxy-containing gel precursor is shown in the figure below:

[0050]

[0051] Among them GPTMS-γ-(methacryloyloxy) propyl trimethoxy silicon

[0052] AG-Glucosamine

[0053] W′——gel precursor

[0054] DMF——N,N-Methylformamide

[0055] Dissolve the gel precursor 2 prepared above in 50 mL of water, add 50 mL of tetraethyl orthosilicate, and keep stirring. After the system is...