摘要
以N-苯甲酰苯基羟胺(BPHA)为功能有机络合剂,优化其选择性去除含铁硫酸铝溶液中铁的工艺条件。考察了BPHA引入量、溶液酸度、反应时间、反应温度等对除铁效率的影响以及BPHA回收循环使用的工艺条件。实验结果表明,在含铁硫酸铝溶液酸度(氢离子浓度)为1.0 mol/L、加入占母液量1.4%的BPHA络合剂乙醇溶液、60℃恒温沉淀反应1 h后,铁去除率高于96.1%,硫酸铝溶液中铁质量浓度低于50 mg/L,优于高纯度一级工业硫酸铝的质量技术指标。该工艺流程简单,反应条件温和,BPHA可回收循环使用,为高档纸张、化工和纺织等高端领域用低铁硫酸铝的工业化生产提供技术参考。
The optimum process of selectively removing iron from aluminum sulfate solution with N-Benzoyl-N-Phenylhy- droxylamine （BPHA） as organic functional complexing agent was studied.The effects of BPHA dosage, acidity of solution, re- action time, and reaction temperature on iron removing efficiency were investigated and the recycle conditions of BPHA were also analyzed.The optimum reaction conditions were obtained as follows：the acidic concentration （hydrogen ion concentra- tion ） was 1.0 mol/L, the BPHA＋ethanol mixed solution amount was 1.4 % based on the mass of aluminum sulfate parent solu- tion, the reaction temperature was 60 ~C, the reaction time was 1 h.Under the optimum conditions the elimination efficiency was above 96.1%, and the iron mass concentration was below 50 mg/L, which was superior to the indexes of the first grade in- dustrial aluminum sulfate product.This method could provide a technical reference for the industrial production of low-iron aluminum sulfate in high-grade paper,textile and chemical fileds due to its simple process flow, moderate reaction condition and BPHA＇s retrievability
出处
《无机盐工业》
CAS
北大核心
2015年第10期12-14,共3页
Inorganic Chemicals Industry
基金
国家自然科学基金项目(21073114)
关键词
N-苯甲酰苯基羟胺
硫酸铝
络合沉淀法
除铁
N-benzoyl-N-phenylhydroxylamine （BPHA）
aluminum sulfate
complexing precipitation
iron removing
