Centrifugal Partition Chromatography: A Scalable and Sustainable Platform for Industrial Purification of Natural and Synthetic Compounds

Abstract

Centrifugal Partition Chromatography (CPC) is a special liquid–liquid phase chromatographic technique in which two immiscible liquid phases are held in a hydrostatic equilibrium. It offers an efficient alternative to solid-phase chromatography for the separation and isolation of natural or synthetic compounds. Unlike the widely used column chromatography, this technique requires a rotating rotor for implementation. The theoretical basis of the method lies in the different partition behavior of components with varying physicochemical properties between the two immiscible phases. Due to the constant centrifugal force generated by rotation, one of the liquid phases becomes immobilized within the rotor chamber, thereby forming the stationary phase required for separation. One of the key advantages of CPC technology is that it eliminates the need for a solid stationary phase, which often represents a significant portion of purification costs. Moreover, the technique is characterized by its scalability and relatively low solvent consumption.

Here we review the operating principle of CPC, the properties of the solvent systems used, and the separation modes that are important from an industrial application standpoint, as well as the technique's suitability for continuous separation processes. Particular attention is given to CPC instrumentation parameters, method development considerations, and the key factors influencing separation efficiency. Using the platforms (rCPC, iCPC) developed by RotaChrom Technologies LLC as examples, we discuss industrial-scale production capabilities of CPC with a focus on pharmaceutical and biotechnological applications.

Through case studies including the purification of oligonucleotides, steroids, cyclic peptides, and natural alkaloids, we present the versatility and efficiency of CPC technology. The method proves especially valuable in fields where purity, yield, and solvent recovery are critical factors, and where environmentally friendly, cost-effective solutions are needed. CPC represents a new generation of liquid chromatography techniques, pointing towards continuous production and sustainable separation technologies.