(110b) Design and Operation of B&P Process Podbielniak Liquid Liquid Extractor Separators
AIChE Spring Meeting and Global Congress on Process Safety
2016
2016 AIChE Spring Meeting and 12th Global Congress on Process Safety
Process Development Division
Best Practices in Process Intensification
Tuesday, April 12, 2016 - 2:00pm to 2:30pm
Continuous Liquid-Liquid contacting in a centrifuge is found in all aspects of chemical handling processes. Some examples are Pharmaceutical or other fermentation processes, fats and oil washing and separation, Petrochemical refining applications such as acidulation/ saponification, Vitamin & Essential Flavor oil extraction, Metal Ion Liquid extractions, simple phase separations and many others. The use is potentially any application where there are two or more immiscible or partially immiscible liquids with a specific gravity difference as low as 0.01 are to be contacted together- either for mass transfer, separation or reaction purposes.
Due to the small size of Podbielniak contactor relative to other separator technologies (such as towers), the process involved equipment can take up less plant floor space. Additionally, this requires less in-process held up material. Since Liquid-Liquid contacting is a process specific application new potential users of this technology are often unaware of its benefits.
This article will cover the basics for scale-up, design, operation, and extraction performance for a well known example liquid- liquid contacting chemical process application (Extraction of Acetic acid with Water from Methyl Isobutyl Ketone). Process implications for centrifuge operation parameters, such as Rotational speed, feed rate variation and process capacity determination, will be covered in brief.
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