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。这项工作将与其他分项目密切合作。与一个子项目一起，将研究有机溶剂中Rh-或Co-络合物和卡宾有机催化剂的分离和回收。由于较高的相对分子质量，预期的多功能催化剂系统应该有利于膜分离，这是一个经常用来描述分离是否成功的参数。同样，对于另一个子项目，将研究在水溶液中用作氧化催化剂的富含地球的过渡金属的分离和回收。还将研究纳滤膜在这些分项目之间进行必要的溶剂交换的潜力。当使用高沸点的溶剂，如碳酸亚丙酯时，这将是特别重要的。从实验中将产生表征膜过程的数据。这些数据将是给定操作条件下的描述符，以建立膜纳滤的混合模型。作为回报，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，将利用一个自学习系统实施间歇膜过程，以控制和保持关于通量和保留率的最佳条件。除了使用商业上可用的纳滤膜外，一个工作包将讨论功能化离子液体的共聚，以生成新型纳滤膜，以及表面修饰以提高选择性。

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.