蛋氨酸皂化液冷冻除碱过程研究  

Investigation on removal process of sodium carbonate from methionine saponification solution using cooling crystallization

作　　者：费忠新 朱亮 赵京鑫 王彦飞 杨立斌 沙作良 赵晓昱 Fei Zhongxin;Zhu Liang;Zhao Jingxin;Wang Yanfei;Yang Libin;Sha Zuoliang;Zhao Xiaoyu(Tianjin Key Laboratory of marine Resources and Chemistry,College of Chemical Engineering and Materials Science,Tianjin University of Science & Technology Department of chemical engineering,Tianjin 300457,China)

机构地区：[1]天津市海洋资源与化学重点实验室天津科技大学化工与材料学院

出　　处：《无机盐工业》2019年第9期81-84,共4页Inorganic Chemicals Industry

基　　金：天津市企业科技特派员项目(18JCTPJC56300)

摘　　要：对蛋氨酸皂化液的冷却结晶除碱过程进行了研究,系统考察了冷却终温、降温速率、晶种添加量等结晶参数对冷却结晶产品十水碳酸钠的纯度以及碳酸钠脱除率的影响。实验结果表明:随着冷却终温的升高,碳酸钠的脱除率逐渐降低,十水碳酸钠的纯度先增加然后几乎保持不变;随着降温速率的增大,十水碳酸钠的纯度逐渐降低,碳酸钠的脱除率变化不大;随着十水碳酸钠晶种添加量的增加,十水碳酸钠的纯度先增加后降低,碳酸钠的脱除率几乎不变。优化工艺条件:降温速率为0.05℃/min,晶种添加量为7.5%(以生成结晶产品的质量为基准),冷冻终温为-10℃。在优化工艺条件下制备的十水碳酸钠的纯度为96.41%,皂化液的碳酸钠脱除率为81.2%。The cooling crystallization and alkaline removing process of methionine saponification solution was studied.The effects of crystallization parameters,such as cooling final temperature,cooling rate and seed addition amount,on the purity and removal rate of sodium carbonate from decahydrate of crystallization products were systematically investigated.Experimental results showed that the removal rate of sodium carbonate decreased gradually with the increase of the cooling terminal temperature. Meanwhile,the purity of sodium carbonate decahydrate increased firstly and then remained almost unchanged.As the cooling rate increases,the purity of sodium carbonate decahydrate decreased gradually,and the removal rate of sodium carbonate did not change much.With the increase of the number of crystal seeds of sodium carbonate decahydrate,the purity of sodium carbonate decahydrate increased first and then decreased,and the removal rate of sodium carbonate was almost unchanged.Optimization of process conditions were obtained: the cooling rate of 0.05 ℃/min,seed addition amount of 7.5%(based on the quality of the crystalline product),the terminal temperature of frozen for-10 ℃. Under the conditions,the crystal purity of sodium carbonate decahydrate was 96.41%,and the removal rate of sodium carbonate in saponification solution was 81.2%.

关 键 词：蛋氨酸皂化液 冷却结晶 十水碳酸钠 

分 类 号：TQ131.12[化学工程—无机化工]