Subproject SP4: Selection, design and application of membrane processes for separation of reactions mixtures

该分项目涉及使用纳滤膜分离和回收均相可溶催化剂。这项工作将与其他次级项目密切合作进行。连同一个子项目，将研究有机溶剂中铑或钴配合物和卡宾有机催化剂的分离和回收。预期的多官能化催化剂体系应有利于膜分离，因为较高的分子量是经常用于描述分离是否可能成功的参数。同样，在另一个子项目中，将研究在水溶液中用作氧化催化剂的地球上丰富的过渡金属的分离和再循环。还将研究纳滤膜在这些子项目之间进行必要溶剂交换的潜力。当使用高沸点溶剂如碳酸亚丙酯时，这将是特别感兴趣的。从实验数据将产生表征膜过程。这些数据将在给定的操作条件下描述，以建立膜纳滤的混合模型。反过来，这将用于实验设计（DoE），以优化分离过程。与另一个子项目一起，将实施一个带有自学习系统的间歇膜工艺，以控制和保持通量和保留的最佳条件。除了使用市售的纳滤膜，一个工作包将解决功能化离子液体的共聚，以产生新型的纳滤膜以及表面改性，以提高选择性。

The subproject addresses the use of nanofiltration membranes for separation and recycling of homogeneously soluble catalysts. This will be done in close cooperation with the other sub-projects. Together with one subproject the separation and recycling of Rh- or Co-complexes and carbene organocatalysts in organic solvents will be investigated. The expected multi-functionalized catalyst systems should facilitate membrane separation due to the higher molecular weight which is a parameter often used to describe whether a separation might be successful. Similarly, for another subproject the separation and recycling of earth-abundant transition metals used as oxidation catalyst in aqueous solutions will be investigated. The potential of nanofiltration membranes for the solvent exchange necessary between these sub-projects will be investigated as well. This will be of special interest when high boiling solvents such as propylene carbonate are used. From the experiments data will be generated to characterize the membrane processes. The data will be descriptors at given operating conditions to setup a hybrid model of membrane nanofiltration. This, in return, will be used for Design of Experiments (DoE) to optimize the separation process. Together with another subproject a batch membrane process will be implemented with a self-learning system to control and maintain optimal conditions with respect to flux and retention. Besides the use of commercially available nanofiltration membranes one work package will address the copolymerization of functionalized ionic liquids to generate novel types of nanofiltration membranes as well as surface modification to improve the selectivity.