Method for the production of chemical and pharmaceutical products with integrated multicolumn chromatography
View Patent ↗The invention relates to a chromatographic process for substance separation in the context of the preparation of chemicals such as, for example, chiral pharmaceuticals, isomers or biomolecules on the small-scale and production scale, based on Simulated Moving Bed (SMB=countercurrent chromatography) technology.
1. A process for the separation of a substance mixture with the aid of a countercurrent chromatography process, in which a substance mixture to be separated and the eluent are continuously supplied to a column circuit consisting of more than one chromatography columns packed with an adsorbent and connected in series and in other positions of the column circuit an extract stream comprising at least one separated component, and a raffinate stream comprising at least one other component are continuously removed and in which a relative movement between a liquid, mobile phase consisting of the substance mixture and the eluent and the adsorbent in solid phase is produced by sequential opening of liquid addition and removal positions along the columns, characterized in that only one eluent supply pump and an eluent compensation container within the circulation, but no circulation pump is employed in the circulation.
2. The process as claimed in claim 1 , characterized in that at most 4 pumps are employed in the chromatography circulation.
3. The process as claimed in claim 1 , characterized in that at least one discharge pump, extract or raffinate discharge, is replaced by a control valve.
4. The process as claimed in claim 1 , characterized in that an automatic discharge of contaminated eluent in the circulation is made possible by means of an online detection and a control valve.
5. The process as claimed in claim 1 , characterized in that the accuracy of the mass flow control is increased by measurement of the recyclate stream and the redundancy thus achieved by means of a measured data balance.
6. The process as claimed in claim 1 , characterized in that in the mass flow regulation the adherence to the total mass balance is achieved by means of a filling level regulation in the eluent compensation container.
7. A process for the preparation of a product, characterized in that the product mixture derived from the reaction is fed directly into a process as claimed in claim 1 and then worked up.