介绍二进料口分馏萃取理论的核心内容,包括各段级数的计算方法等.与传统分馏萃取相比较,二进料口的化工试剂消耗下降且其降幅随进料比增加而增大,当进料比为l时,洗酸的消耗下降了50％.采用动态模拟法研究二进料口分馏萃取体系的产品纯度变化、各段积累量和级样分布的特性.研究表明:二进料口分馏萃取体系的2个产品均能够较快地达到纯度设计指标,即更容易同时获得2个高纯产品,是制备高纯产品的良好技术方法.在二进料口分馏萃取体系中,组分在萃取段和洗涤段的积累只需较少的萃取排数即可直接进入稳态;但是,当萃取排数较低时组分在萃洗段的积累则先进入假稳态,当萃取排数较高时才真正进入稳态.二进料口分馏萃取稳态的级样分布遵循递增规则和递减规则,而且每条分布曲线分别在每个进料级均各有一个转折点.
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