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Parametric studies on the synthesis of amidoximated adsorbent resins

机译：氨基肟化吸附树脂合成的参数研究

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The main goal of this study was to obtain acrylonitrile (AN)-divinylbenzene (DVB) copolymer beads that can serve as the matrix for preparation of amidoxime resins. AN-DVB amidoxime resin was synthesized via suspension polymerization and the effect of different parameters such as the speed of stirrer, the amounts of suspending agent, hydrophilic agent, diluent agent, and initiator on its properties was investigated by fractional factorial (Taguchi) experimental design method. This method gives much-reduced variance for the experiments with optimum control parameters setting and provides a set of minimum experiments compared to the conventional methods. The results showed that the most effective parameters on the amidoximation of resins were hydrophilic agent content, speed of stirrer, and the amount of suspending agent, respectively. Furthermore, anion-exchange capacity of the amidoxime resins was utilized as a criterion for the evaluation of amidoxime adsorbent groups and the adsorption potential of the synthesized resins was determined by cation-exchange capacity. The amount of methylacrylate as a hydrophilic agent had the most significant effect on the ion-exchange capacity of the final product. Swelling ratio was also measured to evaluate the adsorption capacity of the synthesized resin. The results showed that the amounts of hydrophilic and diluent agents had significant effects on swelling ratio of resin. Finally, cation-exchange capacity and swelling ratio of amidoxime resin were changed greatly because of alkaline treatment, but it had no significant effect on the anion-exchange capacity of the synthesized resin.
机译：这项研究的主要目标是获得可以用作制备mid胺肟树脂基质的丙烯腈（AN）-二乙烯基苯（DVB）共聚物珠。通过悬浮聚合合成了AN-DVBB胺肟树脂，并通过分数阶（Taguchi）实验设计研究了搅拌速度，悬浮剂，亲水剂，稀释剂和引发剂等不同参数对其性能的影响。方法。与常规方法相比，此方法可为控制参数设置最佳的实验减少很多偏差，并提供一组最小实验。结果表明，对氨基酰胺化反应最有效的参数分别是亲水剂含量，搅拌速度和悬浮剂用量。此外，将the胺肟树脂的阴离子交换容量用作评价of胺肟吸附基团的标准，并通过阳离子交换容量确定合成树脂的吸附电位。作为亲水剂的丙烯酸甲酯的量对最终产物的离子交换能力具有最显着的影响。还测量溶胀率以评价合成树脂的吸附能力。结果表明，亲水和稀释剂的用量对树脂的溶胀率有显着影响。最后，由于碱处理，resin胺肟树脂的阳离子交换容量和溶胀率发生了很大变化，但对合成树脂的阴离子交换容量没有显着影响。

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