作　　者： ; ; (高前进）;

机构地区： 华南理工大学化学与化工学院

出　　处： 《化学工程》 2013年第3期25-28,49,共5页

摘　　要： 丙酮是一种广泛应用的有机溶剂,其回收具有重要的经济和环境意义。传统的活性炭吸附-解吸-精馏回收工艺存在工艺耗能高、工艺安全性和稳定性差等缺点,新型的水吸收-精馏回收丙酮工艺近年得到重视。但丙酮水吸收过程吸收用水的水质对吸收效果有较大影响,从而影响到后续精馏工艺的能耗。为此,考察了几种典型分散剂、表面活性剂和铵盐等杂质对丙酮水吸收效果的影响。结果表明,除六偏磷酸钠对吸收有弱增强作用外,所选择的表面活性剂和铵盐都不同程度地降低了吸收效果,因此,在吸收过程保持水质的纯净非常重要。同时,文中结合抑制气泡聚并、界面阻力、盐析等机理对杂质对丙酮-水吸收过程的影响进行了相应分析。上述实验结果对工业试验有很好的指导作用。 As an important solvent, acetone is widely used in many chemical industries, thus the recycling of acetone is very important for economic and environmental considerations of these industries. However, the traditional process for recovery of acetone,i.e, activated carbon adsorption-desorption-distillation technology, is high energy consumption with less process safety and stability. Recently, great attentions are paid to retrofits of water absorption-distillation flowsheet,it shows that the impurities have great effect on the absorption efficiency and the energy consumption in subsequent distillation process. Several typical impurities including surfactant, dispersant and ammonium salt were selected and added into absorption water for investigating the effects of impurities on the absorption efficiency of acetone-water system. The experimental results show that only sodium hexametaphosphate has weak advantage for acetone absorption, and surfactant and ammonium salts have disadvantage for acetone absorption, thus maintaining water purity is very important during absorption process. Furthermore, the mechanisms of these phenomena were analyzed by using theory of inhibiting bubble coalescence, interfacial resistance or salting-out, respectively. And the experimental results are promising for industrial application.

关 键 词： 丙酮 吸收 杂质

领　　域： [化学工程]