Production of Oxygen Enriched Air by Liquid Membrane

(1)氧载体的合成与评价：在钴基氧载体中，成功合成了Co （salPr）和Co （3MeOsalen）。这些载体表现出对氧对氮的选择性吸附，且Co （salPr）比Co （3MeOsalen）吸附效果更好。还尝试了另外两种氧载体Co （saltmen）和Co （3MeOsaltmen）的合成。由于从二硝基罗布烷合成胺时遇到的问题，它们没有表现出对氧运输的任何选择性。(2)液膜法制备富氧空气：建立了一种测量气体渗透速率的新实验装置，研究了用不同溶剂稀释的Co （salPr）在微孔聚合物膜的负载下对氧的选择性输运。以二甲基亚砜和二甲乙酰胺为1:1的混合物，氧含量最高达79%。氧与载体的瞬时可逆反应机制很好地解释了氧的选择性输运。由于不可逆氧化，这种载体的活性降低。溶剂的选择很重要。其中，二甲基亚砜和丁内酯的1:1混合物的降解率最低。研究还表明，有机相的补给是有效的。

(1) Synthesis and Evaluation of Oxygen Ccrrier : Among Cobalt-based carriers for oxygen, Co (salPr) and Co (3MeOsalen) were successfully synthesized. These carriers exhibited selective sorption for oxygen to nitrogen and Co (salPr) was better than Co (3MeOsalen). The synthesis of two other types of oxygen carriers, namely, Co (saltmen) and Co (3MeOsaltmen) were also tried. They did not show any selectivity for oxygen transport due to the problem encountered in the synthesis of the amine from dinitrobutane.(2) Production of Oxygen Enriched Air By Liquid Membrane : A new experimental apparatus for the measurement of gas permeation rate was set up and the selective transportation of oxygen was examined with Co (salPr) diluted in various solvents and supported by microporous polymer membranes. The maximum oxygen content of 79% was obtained with 1 : 1 mixutre of dimethylsul-foxide and dimethylacetamide. The selective oxygen transport was well explained by the mechanism with a reversible, instantaneous reaction of oxygen and the carrier. This carrier was found to become less active due to the irreversible oxidation. The choice of solvent was important. Among those examined, 1 : 1 mixture of dimethylsulfoxide and butyrolactone showed least degradation. It was also exhibited that the recharge of the organic phase was effective.