High-Throughput and High-Efficiency Extraction Column (WINTRAY®)

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These extraction columns display the features of high performance and low cost and are applicable to all liquid – liquid extraction systems such as organic compounds extraction. The requirements for extraction columns are: (1) High throughput, (2) High efficiency, and (3) Resistance to fouling. These qualities can be attained by newly installed columns, or by replacing existing trays or packing in existing columns with the WINTRAY^® system. This new type of extraction column is characterized by its unique structure, created by installing two different types of trays alternately, each with a vertical plate having one or two openings (WINdows), resembling windows. In the new type of column, a dispersing liquid (heavy liquid) accumulated on the trays forms into dispersion droplets while flowing out each opening in the form of a liquid plate.
These dispersion droplets are larger than those formed in conventional extraction columns, and the volume of space available for the process of transition from the dispersion to the coalescence of the liquid droplets is smaller than that available in conventional extraction columns. This increases the frequency of dispersion and coalescence of liquid droplets in the extraction section. Consequently, this new type of extraction column can satisfy the above-mentioned three requirements at the same time, and in particular, its throughput can be set at a rate two to five times higher than that of perforated tray towers or agitated type extraction columns, both of which are typical forms of extraction columns presently in use.

Features

High throughput
High-efficiency extraction
Wide operating range (low turndown ratio)
Resistance to interface suspended substances (scum) and fouling
Free from any clogging trouble due to polymerization components
Simple in structure and easy to maintain
Low investment cost

Applications

Applicable to general liquid-liquid extraction and liquid-liquid reaction

Extraction of aromatics from cracked gasoline
Extraction of organic compounds
Increase of capacity of existing RDC (Rotating Disk Contactors),
perforated tray towers or packed towers by replacing existing trays with WINTRAY^®.
Intensification of process performance
Liquid-liquid reaction

Experience

Aromatics extractors (2 units) in Japan
Organic compound extractors (14 units) in Japan, China, Korea and Thailand
Liquid-liquid reactor (1 unit) in japan

Awards

SCEJ (The Society of Chemical Engineering, Japan)
Technology Award (2006)
SSPEJ (The Society of Separation Process Engineers, Japan)
Technology Award (2005)


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