重结晶法提纯ADC发泡剂副产十水碳酸钠的试验研究  

Study on Purifying Sodium Carbonate Decahydrate as By-product ofADC FoamingAgent by Recrystallization Method

作　　者：沈莉 琚振闯 王顺强[2] 赵艳龙[2] 杨兆娟[2] 王继洋[3] 

机构地区：[1]青海盐湖海虹化工股份有限公司,青海格尔木816000 [2]青海大学化工学院,青海西宁810016 [3]中国人民武装警察部队学院,河北廊坊065600

出　　处：《当代化工》2013年第11期1525-1527,共3页Contemporary Chemical Industry

基　　金：青海省科技创新能力促进计划项目(2012-G-Y25A-7)

摘　　要：针对除去ADC发泡剂固废物十水碳酸钠中少量剧毒物质水合肼难题,充分回收利用其中的碳酸钠。采用重结晶法提纯副产物十水碳酸钠。考察了固液比、结晶时间、二次重结晶对十水碳酸钠的收率、水合肼、氯化钠含量的影响。实验结果表明:固液比为2.5∶1,Na2CO3·10H2O收率达76.71%,NaCl含量由原液中的0.115%下降为0.055 5%,N2H4由0.015%下降为0.009 89%;结晶时间20 min,可使Na2CO3收率82%;二次重结晶时间30 min,可使Na2CO3质量百分含量提高到40.35%,NaCl含量下降至0.012 69%。In order to solve the problem of removing a small amount of toxic substance-hydrazine hydrate from Na2CO3·10H2O as by-product in producing ADC foaming agent, to recycle and utilize sodium carbonate, Na2CO3·10H2O was purified by recrystallization method. Effects of solid-liquid ratio, crystallization time and secondary recrystallization on yield of sodium carbonate, hydrazine hydrate content and NaCl content were investigated. The results show that, when solid-liquid ratio is 2.5︰1, Na2CO3·10H2O yield can reach to 76.71%, the content of NaCl decreases from 0.115% to 0.0555%, and the content of N2H4 decreases from 0.015%to 0.00989%;when the crystallization time is 20 min, the average yield of Na2CO3·10H2O can reach to 82%;when the secondary recrystallization time is 30 min, the content of Na2CO3·10H2O can reach to 40.35%, the content of NaCl can drop to 0.01269%.

关 键 词：ADC发泡剂 重结晶 十水碳酸钠 提纯 

分 类 号：TQ028[化学工程]