新型固化单宁大孔吸附树脂的合成
Preparation of a new immobilized tannins macroporous adsorption resin
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摘要: 应用曼尼希反应将植物单宁固定在苯乙烯二乙烯苯共聚物上,制备一种新型固化单宁大孔吸附树脂。系统研究了胺基树脂的合成及其与单宁固化的工艺合成试验,得出最佳工艺条件为:胺基树脂∶甲醛∶单宁(质量比)=2∶0.74∶1,反应温度99~100℃,反应时间7 h。制备的固化单宁大孔吸附树脂具有较好亲水性,对水溶液中苯酚的吸附容量可达90 mg/g。该树脂易洗脱再生,重复使用效果好,对实际含酚废水的富集回收均获得了令人满意的结果。Abstract: A new macroporous adsorption resin immobilized tannins was prepared by immobilizing tannins on styrene-divinylbenzene copolymer using Mannich reaction, The preparation condition of amino resin and immobilizing reaction with tannins were systematically studied, and the optimum synthesis technology was obtained∶amino resin∶formaldehyde∶tannins (mass ratio) =2∶074∶1, reaction temperature 99~100℃, and reaction time 7 h. Under these experimental conditions, the product has good hydrophilicity,and the adsorption capacity of the resin for phenol is 90 mg/g. The resin can be used to enrich and purify phenol from real phenolic wastewater, with satisfactory results respectively.
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Key words:
- immobilized tannins /
- macroporous adsorption resins /
- Mannich reaction
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