摘要
基于膜法破乳技术的研究进展,采用无机微孔膜,以外压内抽方式对W/O乳状液进行了破乳的研究。以NaOH+煤油+液体石蜡+Span80为研究体系,实验研究了影响破乳效果的重要参数透过压方式、膜孔径等对膜通量和破乳率的影响。实验结果表明,亲水性无机微孔膜外压内抽方式破乳,是一种更有效的膜法破乳新方法,此过程受透过压方式和膜孔径的影响较大。膜孔径越小,破乳率越高,膜通量越小;外压内抽方式的破乳效果优于单外压方式的破乳效果。实验数据表明,对于粒径为5～25μm乳液,用膜孔径为2.0μm的SiC微孔膜,在外压60kPa,内负压30kPa的外压内抽破乳方式下破乳,破乳率可达96.4%,膜通量可达900L/(m2·h)。
Based on the development of demulsification processes, the study on demulsification of W/O emulsion by inorganic microporous membrane is carried out with the transmembrane way of outside pressure and inside vacuum. Using NaOH/span-80/liquid wax/kerosene as the working system, the effects of the way of transmembrane pressure and the membrane pore size and such on the demulsification efficiency and permeate flux are studied. The experimental results show that the way of transmembrane associated with outside pressure and inside vacuum is a newly efficiency membrane demulsification technology and its demulsification efficiency is better than that of single outside pressure way. The process is obviously affected by the way of transmembrane pressure and membrane pore size. The smaller the pore size, the better the demulsification efficiency, but lower permeate flux, and higher transmembrane pressure is needed. The test data show that when the droplet size of the W/O emulsions prepared in this study ranged from 5μm to 25μm, the pore size of SiC membrane is 2.0μm, outside pressure is 60kPa and inside vacuum is 30kPa, the demulsification efficiency is 96.4% and the permeate flux is 900 L/(m 2·h).
出处
《化学工业与工程技术》
CAS
2006年第1期25-28,共4页
Journal of Chemical Industry & Engineering
关键词
乳液
破乳
无机微孔膜
Emulsion
Demulsification process
Inorganic microporous membrane
