三烯丙基异氰脲酸酯合成废渣中氯化钠的回收

采用浸取—抽滤分离—减压蒸发—结晶的方法处理三烯丙基异氰脲酸酯(TAIC)合成废渣,回收其中的氯化钠。通过单因素实验和正交实验探讨了液固比、浸取温度、搅拌时间对氯化钠回收率的影响。实验结果表明,在浸取温度为30℃、搅拌时间为30 min、液固比为15的最佳工艺条件下,氯化钠回收率为81.53%。回收氯化钠产品符合GB/T 5462—2003《工业盐》精制工业盐一级标准。采用本工艺每处理1 t TAIC合成废渣可节约费用3 064元,经济效益显著。

Recovery of Sodium Chloride from Residue in Synthesis of Triallyl Isocyanurate

The residue in synthesis of triallyl isocyanurate （TAIC） was treated to recover sodium chloride by the process of leaching-suction filtration-vacuum evaporation-crystallization. The effects of liquid-solid ratio,leaching temperature and stirring time on sodium chloride recovery rate were studied through single factor experiments and orthogonal experiments. The experimental results show that under the optimum process conditions of leaching temperature 30 ℃,stirring time 30 min and liquid-solid ratio 15,the recovery rate of sodium chloride is 81.53%. The product quality can meet the first grade of the national standard of GB/T 5462-2003 for purified industrial salt. 3 064 yuan can be saved in the treatment of 1 t TAIC synthesis residue.