共沸(Azeotrope),是指两组分或多组分的液体混合物以特定比例组成时,在恒定压力下沸腾,其蒸气组成比例与溶液相同的现象。这实际是表明,此时沸腾产生的蒸气与液体本身有着完全相同的组成。共沸物是不可能通过常规的蒸馏或分馏手段加以分离的。
In this paper,the heterogeneous azeotropic distillation was used to separate glycol and 1,2-propanediol with ethylbenzene,mixed xylene and cumene as azeotropic agent,respectively. Combining with the selectivity of azeotropic agent and the azeotropic point of azeotropic agent,suitable azeotropic agent was determined.
本文通过非均相共沸精馏的方法采用乙苯、混合二甲苯、异丙苯三种共沸剂进行实验,结合共沸剂的选择性和共沸物的共沸点来确定共沸剂。
参考来源 - 非均相共沸精馏分离乙二醇及1At last the two parts were combined by interface files. The screening indexes of extractant include relative volatility, molecular weight, freezing point, boiling point, azeotrope judgement and molecule stability.
本文提出以相对挥发度、相对分子摩尔质量、熔点、沸点、共沸和稳定判断等为筛选指标进行分子设计;提出以选择度、热容、蒸发焓、粘度、溶解性和性能指数等为评价指标,对筛选出的典型的分子进行评价。
参考来源 - 萃取精馏萃取剂分子设计的研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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