The key step in reclamation of monoethylene glycol (MEG) is chloride removal from the rich MEG solution containing high Cl concentration. Chloride removal from MEG reclamation operation has been investigated in this wok through the chemical precipitation of insoluble Friedel's salt, created by the addition of calcium and aluminum compounds. Response surface methodology has been used to design experiments and optimize the effect of independent variables. The selected ranges of various factors were: initial concentration of chloride (1500–4500 mg/l), molar ratio of Al: Cl (0.5–3), molar ratio of Ca: Cl (1–6), Temperature (25–80 °C), and wt.% of MEG (30–70). It was found that at higher starting Cl concentrations, the reaction for forming Friedel's salt is superior to other reactions. The efficiency of multi-stage Cl removal has also been investigated. It was found that, under assumed operating conditions, a 70% removal efficiency at each step and a 97% chloride removal can be achieved by the end of stage 3.

回收单乙二醇（MEG）的关键步骤是从含有高Cl浓度的富MEG溶液中去除氯化物。在该炒锅中，通过添加钙和铝化合物而产生的不溶性弗瑞德盐的化学沉淀，已经研究了从MEG回收操作中去除氯化物的过程。响应面方法已用于设计实验和优化自变量的影响。各种因素的选定范围是：氯化物的初始浓度（1500–4500 mg / l），Al：Cl的摩尔比（0.5–3），Ca：Cl的摩尔比（1-6），温度（25–80） °C）和MEG的重量百分比（30–70）。已经发现，在较高的起始Cl浓度下，形成弗瑞德盐的反应优于其他反应。还研究了多级去除氯的效率。结果发现，在假定的操作条件下，到阶段3结束时，每个步骤的去除效率为70％，氯化物的去除率为97％。