Batch chromatography with recycle lag. II-Physical realization and experimental validation.

Area of Science:

• Chemical Engineering
• Analytical Chemistry
• Separation Science

Background:

• Batch chromatography is a key separation technique.
• Recycle lag in batch chromatography can impact efficiency.
• Optimizing eluate handling is crucial for large-scale applications.

Purpose of the Study:

• To design, construct, and validate a prototype eluate recycling device (ERD).
• To implement an approximate "first in, first out" (FIFO) system for eluate fractions.
• To demonstrate the ERD's utility in large-scale batch chromatography.

Main Methods:

• Detailed construction and setup of the ERD connected to a chromatography column.
• Utilized two-way valves and six-port switching valves for operational control.
• Experimental validation using reversed-phase chromatography for nucleoside mixture separation.

Main Results:

• Successful experimental validation of the ERD setup.
• Demonstrated effective recycling of eluate fractions.
• Identified potential performance improvements through 3D printing of the fluid distributor.

Conclusions:

• The developed ERD is a viable physical realization of batch chromatography with recycle lag.
• The system is simple to set up, particularly for large-scale operations.
• 3D printing offers a pathway to enhance ERD performance.