低能耗制备试剂级二水氯化铜的新工艺  

A Novel Preparation Technology of Reagent Grade Copper Chloride Dihydrate with Less Energy Consumption

作　　者：宋传京 黄萍 朱欢 

机构地区：[1]深圳市深投环保科技有限公司,广东深圳518049

出　　处：《化学与生物工程》2017年第11期59-61,66,共4页Chemistry & Bioengineering

摘　　要：基于二水氯化铜的溶解特性及铜离子的配位特性,首次提出氯化铜饱和溶液盐析法制备二水氯化铜的新工艺。结果表明:控制适当的盐酸浓度、溶解温度及冷却结晶温度,可一次性制备出试剂级二水氯化铜产品;铜单次回收率跟盐酸浓度和冷却结晶温度有关。结晶方式对二水氯化铜晶型有较大影响,搅拌条件下得粉末状的二水氯化铜晶体,静置或缓慢结晶得针状的二水氯化铜晶体。氢氧化铜和硫酸钡共沉淀法可有效降低母液的有害杂质含量,母液可和盐酸调配使用,用于二次制备二水氯化铜,或者返回碱式氯化铜生产工段,用于生产碱式氯化铜产品,实现母液的循环利用。该工艺避免了常规生产方法的蒸发浓缩工段,有效降低了生产能耗。On the basis of the solubility characteristic of copper chloride dihydrate and coordination property of copper ion,we firstly put forward a new technology to prepare copper chloride dihydrate by salting-out meth- od of copper chloride saturated solution. The results showed that through controlling appropriate hydrochloric acid concentration, solution temperature, and cooling crystallization temperature, we could prepare reagent grade copper chloride dihydrate by once-through step. The single recovery rate of copper was related to hydrochloric acid concentration and cooling crystallization temperature. Crystalline method had a great impact to the crystal form of copper chloride dihydrate. Powdered copper chloride dihydrate crystal was prepared under stirring con- dition and acicular copper chloride dihydrate crystal was prepared under static or slow crystallization condition. The coprecipitation method of cupric hydroxide and barium sulphate could effectively reduce the harmful impu- rity content in mother liquid,and the mixture of mother liquid and hydrochloric acid could be adopted to second prepare copper chloride dihydrate or go back to the production section of copper chloride hydroxide to produce copper chloride hydroxide product, which realized the recycling of mother liquid. This process avoids evapora- tion and concentration section of conventional production,and effectively reduces energy consumption.

关 键 词：二水氯化铜 碱式氯化铜 盐酸 饱和溶液盐析法 

分 类 号：TQ131.21[化学工程—无机化工]