化工进展2017，Vol.36Issue(10)：3800-3806,7.DOI:10.16085/j.issn.1000-6613.2017-0232
直接氧化法和离子膜电渗析法制备聚合硫酸铁工艺的比较
The comparison of direct oxidation process and electrodialysis process for preparing polyferric sulphate
摘要
Abstract
Two different processes for preparing polyferric sulphate(PFS) were investigated and compared.Firstly,PFS was generated through direct oxidation process with ferrous sulfate and sulfuric acid as raw materials,and with the potassium chlorate as oxidizing agent.The effect of reaction temperature,reaction time,and the molar ratio of ferrous sulfate to sulfuric acid in raw materials on basicity was investigated.Results showed that basicity improved from 7.68％ to 9.34％ when reaction temperature increased from room temperature to 70℃.As the molar ratio in raw materials increased from 2.01 to 4.08,basicity increased from 8.65％ to 11.91％.However,The increase of the reaction time did not improve the basicity.Secondly,ion exchange membrane electrodialysis was used to prepare PFS.The effects of current density and membrane stack configuration on basicity were investigated.Results showed that the basicity increased from 7.68％ to 20.13％ remarkably when current density increased from 0 to 30mA/cm2.And basicity was not affected by membrane stack configurations.Compared with BP-A configuration,BP-A-C configuration could decrease membrane stack voltage drops and energy consumption.Thirdly,the two processes were compared in terms of PFS performance and production cost.Results showed that the performance of PFS generated by electrodialysis process was better than that of PFS generated by direct oxidation process,while the former cost was 1.16＄/L PFS higher that the latter cost.关键词
离子交换/膜/混凝/化学反应Key words
ion exchange/membrane/coagulation/chemical reaction分类
化学化工引用本文复制引用
陈倩如,汪小尧,汪婷婷,刘晓瑞,张旭..直接氧化法和离子膜电渗析法制备聚合硫酸铁工艺的比较[J].化工进展,2017,36(10):3800-3806,7.基金项目
国家级大学生创新实验项目基金(201610359037)及安徽省自然科学基金(1608085QB41)项目. （201610359037）
