摘要:本论文对碱式碳酸铜的工艺制备过程及最佳生产条件进行了研究。铜是动物和人体所必需的微量元素。微量的铜对生物的生长发育有促进作用。 本论文中采取碳酸氢铵法制备碱式碳酸铜,酸性废液中加入强碱后,生成氢氧化铜,在加热搅拌的条件下发生分解反应,变为黑色氧化铜,后者与盐酸反应生成铜盐。与碳酸氢铵溶液在适当条件下反应即可生成不溶于水的碱式碳酸铜,将制得的碱式碳酸铜在105~106℃的烘箱中烘干两小时,取出后冷却至室温,即可获得碱式碳酸铜,用碘量法和分光光度计法测定其有效含量。其最佳实验条件经测试得出为加热温度为80℃~85℃,搅拌速度为3000转/分钟,用24g氢氧化钠固体,2mol/L盐酸溶液,2mol/L碳酸氢铵溶液,反应温度为20℃(室温),溶液pH值控制在7.0~7.5之间等。在此条件下,碘量法测定的铜含量结果为97.17%,分光光度计法测定的铜含量为98.47%,收率良好。23210
毕业论文关键词:含铜废液;碱式碳酸铜;碘量法测铜含量
Study on the preparation of basic cupric carbonate in the industry
Abstract:The thesis studies the preparation of basic cupric carbonate in the industry and the best production conditions. Copper is an important microelement for people and lives. But, with the development of industry, the amount of coppery liquid waste has increased. If discharge these coppery liquid waste at will, the environment will not support the waste. It leads to the pollution of water and soil and has harm on the survival of animals and people. So, the recycle and reproduction of coppery liquid waste is important. The preparation of basic cupric carbonate based on the coppery liquid waste increased the value of coppery liquid waste. This point is the most important centre in my study. The best condition of this study is: heating temperature 80℃~85℃, stirring rate 300r/min,24g sodium hydroxide(solid), 2mol/LHydrochloric Acid solution,2mol/L Ammonium Bicarbonate solution, reaction temperature 20℃,the pH of the solution is 7.0~7.5 etc. Under these conditions, the productivity of basic cupric carbonate is 97.17% measured by iodometry, the productivity of basic cupric carbonate measured by spectrophotometer is 98.47%.
Key Words:coppery liquid waste, basic cupric carbonate, best production conditions, iodometry
目录
1 前言 1
1.1 碱式碳酸铜的性质 1
2 仪器与试剂 7
2.1仪器 7
2.2 标准试剂及用品 7
2.3 标准溶液的配制 8
2.4 样品来源及性状 8
3 实验内容 9
3.1从含铜废液中制取碱式碳酸铜 9
3.1.1 样品前处理 9
3.1.2 氧化铜的制备 9
3.1.3 氯化铜的制备 9
3.1.4 碳酸氢钠法制备碱式碳酸铜 10
3.1.5 碳酸氢铵法制备碱式碳酸铜 10
3.2 产物中铜含量的测定 10
3.2.1测定铜含量的滴定方法选择 10
3.2.2试剂的选择与准备 11
3.2.3 硫代硫酸钠标准溶液的标定 11
3.2.4 测定样品中的铜含量并计算产率 12
3.3分光光度法测定产物中的铜含量 14
3.3.1分光光度法的原理 14
3.3.2 络合剂的选择 15
3.3.3试剂的准备及配制 16
3.3.4产物中铜含量的测定 17
3.3.5分光光度计测定铜含量的结果计算 17
3.3.6 两种分析方法的比较 19
4 结果与谈论 20
4.1 用碳酸氢钠和碳酸氢铵制取的产品质量的比较 20 碱式碳酸铜的制备工艺研究+文献综述:http://www.751com.cn/huaxue/lunwen_16163.html