Method for deep dephosphorization by using embedded lanthanum oxide composite resin
A technology of composite resin and lanthanum oxide, which is applied in chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of lack of nano-small size effect of functional adsorption materials, low working adsorption capacity, and single force, etc., to achieve improvement Dispersed state on the inner surface, solving the effect of large fluid resistance and strengthening the adsorption performance
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[0019] Example 1
[0020] Take 25g of D201 type anion exchange resin (produced by Hangzhou Zhengguang Industrial Co., Ltd.) as a support material, place it in 2.5L of 5% lanthanum nitrate aqueous solution, control the reaction temperature to 40℃, fully stir the reaction for 10h, and make La gradually diffuse To the inner surface of the anion exchange resin channel. Then the resin was filtered and placed in 1500 mL of sodium hydroxide solution with a mass fraction of 5% for in-situ precipitation reaction at room temperature. The precipitation reaction time was controlled to 10h. After the reaction was completed, it was filtered and heat-treated at 40°C for 5h to obtain embedding Formula nano lanthanum oxide composite resin, such as figure 1 As shown, the loading amount is 6.5%.
[0021] Put 3mL of the above composite resin in a glass adsorption column (ф12×220mm) to remove phosphorus-containing water (P=1.5mg / L and SO 4 2- =200mg / L, Cl - =100mg / L,NO 3 - =160mg / L, pH=5) From top to...
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[0022] Example 2
[0023] Take 50g of 201x7 type anion exchange resin (produced by Tianjin Bohong Resin Technology Co., Ltd.) as a support material, place it in 1000 mL of 10% lanthanum nitrate aqueous solution, control the reaction temperature to 60 ℃, fully stir the reaction for 12 hours, and make La gradually diffuse To the inner surface of the anion exchange resin channel. Then the resin was filtered and placed in 2000mL of 10% sodium hydroxide solution at room temperature for in-situ precipitation reaction. The precipitation reaction time was controlled to 12h. After the reaction was completed, it was filtered and heat-treated at 60℃ for 8h to obtain embedding -Type nano-lanthanum oxide composite resin with a loading capacity of 22.31%.
[0024] Put 5mL of the above composite resin in a glass adsorption column (ф20×420mm) to remove phosphate-containing surface water (P=10mg / L and SO 4 2- =180mg / L, Cl - =200mg / L,NO 3 - =220mg / L, pH=10) Flow through the adsorption column contai...
Example Embodiment
[0025] Example 3
[0026] Take 20g of D202 (produced by Hebei Guoao Resin Factory) as a carrier material, place it in 2L of 35% lanthanum nitrate aqueous solution, control the reaction temperature to 55℃, fully stir the reaction for 11h, so that La gradually diffuses into the pores of the anion exchange resin surface. Then the resin was filtered and placed in 2000mL of 15% sodium hydroxide solution at room temperature for in-situ precipitation reaction. The precipitation reaction time was controlled to 12h. After the reaction was completed, it was filtered and heat-treated at 55°C for 5h to obtain embedding Formula nano lanthanum oxide composite resin, such as figure 1 As shown, the loading amount is 18.5%.
[0027] Put 4mL of the above composite material in a glass adsorption column (ф12×220mm) to remove phosphorus-containing water (P=4mg / L and SO 4 2- =200mg / L, Cl - =200mg / L,NO 3 - =260mg / L, pH=6) From top to bottom, flow through the adsorption column equipped with composite re...
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