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ACHEMASIA 2004: Scale-out for Highest Product Purity

May 13, 2004

The Institut für Mikrotechnik Mainz GmbH (IMM) has developed a flexible system which evenly distributes a liquid flow to six different micromixers without an active flow regulation being necessary. The liquid distribution system was operated with selected impinging jet micro mixers and specifically adjusted separation layer micro mixers serving as flow resistance. For the first time, such a system was successfully applied to conduct an organic synthesis exemplified by acetic acid-n-butylamine. Right away, this prototype achieved a total yield of 88 per cent and a product purity of up to 99 per cent.

More throughput by scaling-out or numbering-up - it sounds simple in theory: As many micro reactors or mixers are simultaneously connected until the desired output is achieved. However, in practice, this concept soon reaches economic limits because parallel to the growing number of reactors expenses for control engineering increase.

The liquid distribution system of IMM considerably simplifies process control in micro process engineering. Distributing, for example, three components which are to be mixed to six micromixers, requires only three pumps. Conventional systems require 18 pumps. The distribution of the liquid is only controlled by the mixers' pressure loss (ca. 120 millibar). With precisely manufactured micromixers with equal pressure loss, deviations of the liquid distribution remain below five per cent. This good result was achieved by the choice of material, optimization of design and the production process. Currently, further versions of the liquid distribution system are developed which not only allow the use of separation layer micro mixers but also combinations with other micro components.

The development of the liquid distribution system was funded by the European Commission (project no. G5RD-CT-1999-00123).

IMM is an internationally recognised research and development organisation in the field of microsystems technology focusing strongly on the specific customer requirements.

We look forward to seeing you:

11-15 May 2004, ACHEMASIA, Beijing, China
6th International Exhibition-Congress on Chemical Engineering and Biotechnology
Hall 2.0, booth E13
www.achemasia.de

Institut - Mikrotechnik Mainz IMM GmbH

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