Investigating the influence of operating parameters is a critical step in development of diffusion dialysis for acid recovery. A series of novel anion exchange membranes consisted of methyl 6-(dimethylamino) hexanoate (MDMH) and poly (2, 5-dimethylphenyl oxide) are successfully fabricated and used for acid recovery via DD process. Initially, the 6-(dimethylamino) hexanoic acid and MDMH are synthesized via condensation reaction and its chemical structure is confirmed by ¹H NMR spectroscopy. After membranes fabrication, the chemical composition and morphological structures are confirmed by Fourier transform infrared spectroscopy and scanning electron microscopy. The MDMH-QPPO AEMs possess good acid permeability, selectivity, and outstanding thermo-mechanical stability. A synthesized membrane (MDMH-QPPO-5) with better performance of acid permeability and selectivity is selected for mathematical and statistical studies of process parameters in diffusion dialysis. The effect of process parameters including temperature, time and feed concentration are studied through full factorial design (FFD). The half normal plot is used to investigate the order of process parameters that considerably affecting the acid dialysis coefficient and separation factor. The results showed that the investigation of significant process parameters is useful to improve the acid recovery via diffusion dialysis.

研究操作参数的影响是开发用于酸回收的扩散透析的关键步骤。成功制备了一系列由6-（二甲基氨基）己酸甲酯（MDMH）和聚（2,5-二甲基苯氧基）组成的新型阴离子交换膜，并通过DD法将其用于酸回收。最初，通过缩合反应合成6-（二甲基氨基）己酸和MDMH，其化学结构由¹确定。1 H NMR光谱。制膜后，通过傅立叶变换红外光谱和扫描电子显微镜确认化学成分和形态结构。MDMH-QPPO AEM具有良好的酸渗透性，选择性和出色的热机械稳定性。选择一种具有更好的酸渗透性和选择性的合成膜（MDMH-QPPO-5）进行扩散渗析过程参数的数学和统计研究。通过全因子设计（FFD）研究了工艺参数（包括温度，时间和进料浓度）的影响。半正态图用于研究对酸渗析系数和分离系数有重大影响的工艺参数的顺序。