Udex Universal Dow Extraction


Udex Universal Dow Extraction :

A process for removing aromatic hydrocarbons from petroleum fractions by liquid liquid extraction with glycols, followed by extractive distillation. The glycol used originally was diethylene glycol, but later this was replaced by triethylene glycol and tetraethylene glycol. Extraction is conducted at 140 to 150ºC under a pressure of 10 atm

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