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针对6-氨基青霉烷酸(6-APA)母液结晶后剩余的废水,设计了乳化液膜体系来处理废水中的6-APA,以三辛胺作为载体,研究了乳化液中的溶剂类型、载体浓度、内相浓度、油内比〔V(油相)∶V(内相),下同〕、外相p H、乳水比〔V(乳状液膜)∶V(外相),下同〕、传质搅拌速率等因素对6-APA提取效果的影响。结果表明:在乳化液中以煤油为膜溶剂(体积分数为88%)、三辛胺体积分数为5%、液体石蜡体积分数为1%、表面活性剂Span80体积分数为6%、内相Na2CO3质量分数为5%、油内比为2∶1、外相p H=5.5~6.5、乳水比为1∶4、传质搅拌速率为300~350 r/min、反应时间为30 min时,经一级乳化液膜分离之后,6-APA的提取率可达72.9%,二次提取率可达93%以上。乳化液的离心破乳率可达65.2%,破乳后的有机相可重复利用5次,对6-APA的提取率仍可达68%以上。
Aiming at the remaining wastewater after the crystallization of 6-aminopenicillanic acid (6-APA) mother liquor, an emulsion liquid membrane system was designed to treat 6-APA in waste water. Using trioctylamine as a carrier, the solvent type , Carrier concentration, internal phase concentration, oil internal ratio [V (oil phase): V (internal phase), the same below), external phase p H, 〕 Mass transfer rate of stirring and other factors on the 6-APA extraction effect. The results showed that the volume fraction of trioctylamine was 5%, the volume fraction of liquid paraffin was 1%, the volume fraction of surfactant Span80 was 6%, the internal phase of Na2CO3 Mass fraction of 5%, oil internal ratio of 2: 1, external phase p H = 5.5 ~ 6.5, milk water ratio of 1: 4, mass transfer stirring rate of 300 ~ 350 r / min, reaction time of 30 min, After the first emulsion membrane separation, 6-APA extraction rate of 72.9%, secondary extraction rate of up to 93%. The centrifugal demulsification rate of emulsion can reach 65.2%, the organic phase after demulsification can be reused 5 times, and the extraction rate of 6-APA can still reach over 68%.