CAJ | 학술논문

采用连续带渣浸提法从烟草中获取烟碱，通过研究烟碱在溶剂相、水相和烟叶渣之间的分配特征，确立了浸提过程的关键控制因素。在控制烟叶初始含水量30％～50％、原料超声波处理、调整无机碱添加量为烟叶量的3％～5％等的基础上，将烟叶浸泡和液液萃取两步同时进行。确定萃取时间、级数、溶剂比后，在日处理20kg烟叶的中试装置进行4级连续逆流放大实验，平均萃取率超过90％。整个过程基本无废水排放，工艺过程缩短。采用富含正己烷的6号溶剂油也是本工艺的一大特点，萃取效果好，毒性低，操作实现了连续化。
채용련속대사침제법종연초중획취연감，통과연구연감재용제상、수상화연협사지간적분배특정，학립료침제과정적관건공제인소。재공제연협초시함수량30％～50％、원료초성파처리、조정무궤감첨가량위연협량적3％～5％등적기출상，장연협침포화액액췌취량보동시진행。학정췌취시간、급수、용제비후，재일처리20kg연협적중시장치진행4급련속역류방대실험，평균췌취솔초과90％。정개과정기본무폐수배방，공예과정축단。채용부함정기완적6호용제유야시본공예적일대특점，췌취효과호，독성저，조작실현료련속화。
A continuous extraction method has been used in this paper for the extraction of nicotine without removing the dregs of tobacco leaves. Tobacco leaves are first pretreated with alkaline water, and then solvent No.6, which is affluent in hexane, is added into the system. Because the initial moisture content is less than 50%, there is no free water in the process. Since the dregs remain in the extraction system, nicotine is extracted fiom a film of water on the dregs to the solvent phase at the same time that nicotine is separated from dregs to the water phase. Compared to traditional methods this process has several advantages such as less waste water and time consumption. Theamount of alkali, solvent/tobacco leaves ratio, initial moisture content and the extraction temperature are determined in this study. A pilot-plant experiment of 20 kg tobacco per day is carried out, the average nicotine extraction rate is above 90%.