混合表面活性剂对氯化钠晶体生长的控制研究  

Study on the Control of NaCl Crystallization by Mixed Additives

作　　者：李志远[1] 韦丽红[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《海湖盐与化工》2003年第5期8-9,17,共3页Sea-Lake Salt and Chemical Industry

摘　　要：　研究了K+,Na+//Cl-,SO2-4体系中氯化钠蒸发结晶过程中混合表面活性剂的加入对晶体的成核及生长的显著影响。控制混合表面活性剂组份与用量在极短时间内得到晶形完美的氯化钠大晶体(4mm～6mm),解决了因为结晶细碎造成的堵塞管道及设备结垢问题,采用自然循环式蒸发器代替强制循环类蒸发器,能源消耗降低了70%,从而降低生产成本,提高了氯化钠的质量,大大降低了K+的循环损失。The process of evaporation crystallization by adding mixed surfactant was studied in system of K+,Na+//Cl-,SO2-4.The effect of additives LAS/ASC on crystal nucleation and growth was discussed.The excellent large crystal (4mm～6mm)was obtained in short time by controlling amount and ratio of the mixed surfactants.The problem of scale prevention and cleaning was avoided.The purity of NaCl and yield of K+ was improved by using natural circulation evaporator.

关 键 词：表面活性剂 蒸发 结晶 晶体界面能 

分 类 号：TQ131[化学工程—无机化工]