摘要
高浓度表面活性物质的分离是泡沫分离过程的难题,也是制约泡沫分离技术应用于工业化生产的瓶颈。为了解决高浓度表面活性物质泡沫分离的难题,以阴离子表面活性剂十二烷基硫酸钠(SDS)水溶液为体系,研究了在其临界胶束浓度(CMC)附近时,温度对SDS水溶液气泡直径、泡沫稳定性、富集比及回收率的影响。结果表明:温度对高浓度表面活性物质的泡沫分离有显著影响。当SDS水溶液浓度分别为1.2、2.3、3.5 g L 1,温度从30 C升高到70 C时,泡沫稳定性先增大后减小,在pH 6.9、表观气速2.4×10 3m s 1、装液量200 mL的操作条件下,气泡直径先减小后增大,富集比提高了3～5倍,回收率降低了34%～65%。
Separating high concentration surfactant by foam separation is a difficult problem, which is also the bottleneck that constrains the application of foam separation technology to industrialization. In order to resolve this difficult problem, anionic surfactant sodium dodecyl sulfate （SDS） was used as the model system, and the effects of temperature on bubble diameter, foam stability, enrichment ratio and recovery percentage were investigated around the critical micelle concentration （CMC） of SDS. The results show that the temperature is an important parameter for separating high concentration surfactant by foam separation. When the concentrations of SDS aqueous solution are 1.2, 2.3, 3.5 g-L-1, respectively, with increasing temperature from 30 to 70℃, foam stability initially increases and then decreases, at the same time under the conditions ofpH 6.9, and superficial air flow rate 2.4×10-3 m.s-1, the bubble diameter firstly decreases and then increases, the enrichment ratio increases by 3-5 times, and the recovery percentage decreases by 34%-65%.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2012年第3期536-540,共5页
Journal of Chemical Engineering of Chinese Universities
基金
天津市应用基础及前沿技术研究计划重点项目(08JCZDJC25200)
河北省自然科学基金(B2011202056)
关键词
温度
高浓度
SDS
泡沫稳定性
泡沫分离
temperature
high concentration
SDS
foam stability
foam separation
