系统研究了3种酸性离子交换纤维对 N-甲基吡咯烷酮中甲胺杂质的脱除效果,考察了温度、溶液含水量及甲胺含量对其吸附性能的影响。结果表明, PP-ST-DVB基强酸纤维是N-甲基吡咯烷酮中甲胺杂质吸附脱除的适宜分离材料,其对甲胺的吸附是一个自发吸热反应,吸附过程符合准二级动力学模型。PP-ST-DVB基强酸纤维对 NMP 中甲胺的动态吸附容量可达110mg/g以上,该纤维经30次重复再生使用后,吸附性能基本不变,显示了优异的化学稳定性能。工厂中试实验表明,PP-ST-DVB基强酸纤维能够有效脱除低含水量、低甲胺含量的工业 N MP 中的甲胺,处理后的N MP中甲胺含量、水含量均达到电子级N MP 的标准。
The paper systematically studied the adsorption properties of three acidic ion exchange fibers(IEF)for methylamine in NMP solution and the effect of temperature,methylamine content and water content on the ad-sorption capacitywere investigated.The results showed that PP-ST-DVB fiber was the suitable adsorbent to treat industrial NMP,and the adsorption was endothermic and spontaneous.Furthermore,the adsorption could be best described by the pseudo second order kinetic model.The dynamic adsorption capacity of PP-ST-DVB IEF for methylamine could reach 110mg/g.30 adsorption and regeneration experiments were conducted,and the results showed that the adsorptioncapacity was almost invariant during these tests.Results of pilot scale test indicated that the industrial NMP solvent could be treated effectively by PP-ST-DVB fiber.Methylamine con-tent and water content of the treatment solution could satisfy the requirements of electronic grade NMP.
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