In a particular advantage we have found that some impurities such as chlorinated cyclic acetals have {HEAD ~ a boiling point} greater than {TAIL ~ both EO} and water, for example of 200° C., whereby they might be expected to reside in a waste water stream, but that they have a relative volatility between that of EO and water, whereby they may surprisingly be separated from the bottom and top streams by the side draw of the invention 
In a particular advantage we have found that some impurities such as chlorinated cyclic acetals have { HEAD ~ a boiling point } greater than { TAIL ~ both EO } and water , for example of 200 ° C. , whereby they might be expected to reside in a waste water stream , but that they have a relative volatility between that of EO and water , whereby they may surprisingly be separated from the bottom and top streams by the side draw of the invention
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