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Continuous dialysis of sulphuric acid and magnesium sulphate

机译：硫酸和硫酸镁的连续渗析

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The competitive transport of sulphuric acid and magnesium sulphate through an anion-exchange membrane Neosepta-AFN (Astom Corporation, Japan) is investigated in a two-compartment counter-current dialyzer with single passes at steady state. The dialysis process is characterized by the recovery yield of acid and the rejection coefficient of salt. The experiments prove that the- recovery yield of acid is in the limits from 61% to 87%, while the rejection coefficient of magnesium sulphate is in the limits from 87% to 97%. Moreover, the simultaneous transport of acid and salt is satisfactorily quantified by four phenomenological coefficients, which are functions of acid and salt concentrations in the feed. For this purpose, two ordinary differential equations describing the steady-state concentration profiles of both the components in both the compartments of the dialyzer are numerically solved in the combination with an optimizing procedure. The mathematical model used considers the mass trasfer resistances in liquid films on both the sides of the membrane.
机译：硫酸和硫酸镁通过阴离子交换膜Neosepta-AFN（日本Astom公司）的竞争性运输是在两室逆流透析器中进行的，该透析器单稳态运行。透析过程的特征在于酸的回收率和盐的截留系数。实验证明，酸的回收率在61％至87％的范围内，而硫酸镁的排斥系数在87％至97％的范围内。此外，酸和盐的同时转运可通过四个现象学系数令人满意地量化，这四个系数是饲料中酸和盐浓度的函数。为此，结合优化程序在数值上求解了描述透析器两个隔室中两种成分的稳态浓度分布的两个常微分方程。所使用的数学模型考虑了膜两侧的液膜中的传质阻力。

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