丙酰氯废液中和处置技术

Research on Neutralization and Disposal Method of Propionyl Chloride Waste Liquid

为了降低酸度很高、腐蚀性很强的丙酰氯废液的处置难度,增加后端处置的安全和效率。先用去离子水稀释丙酰氯废液,而后采用质量分数为3%的NaOH溶液及Na_(2)CO_(3)、NaHCO_(3)共三种药剂进行中和反应,调节碱性药剂使用量,中和丙酰氯废液至中性。结合反应体系温度、pH、热值、酸雾产生情况和体系反应剧烈程度等多个指标,探究最优的中和药剂及反应条件。最优结果为:丙酰氯废液先稀释20倍,每1 g丙酰氯废液需使用2 g碳酸氢钠中和。废液中和后pH为7.0,反应体系有二氧化碳气体逸出,无温度变化,无酸雾产生,中和后废液热值为0。

In order to reduce the difficulty of disposal of propionyl chloride waste liquid with high acidity and corrosion,the safety and efficiency of back-end disposal are increased.First dilute the propionyl chloride waste liquid with deionized water,and then neutralize the reaction with three reagents,NaOH solution with a mass concentration of 3%,Na_(2)CO_(3)and NaHCO_(3),a djust the amount of alkaline agents,neutralize the propionyl chloride waste liquid to neutral,and combine the reaction system temperature,pH,heating value,acid fog generation and system reaction intensity and other indicators.The optimal neutralizing agents and reaction conditions were investigated.After the test,the optimal result is as follows:the waste propionyl chloride solution is diluted 20 times first,and every 1 g of waste propionyl chloride solution needs to be neutralized with 2 g sodium bicarbonate.The pH after neutralization is 7.0,carbon dioxide gas escapes from the reaction system,there is no temperature change and no acid fog is generated,and the heat value of the waste liquid after neutralization is 0 cal/g.