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Merck

On-demand separation of oil-water mixtures.

Advanced materials (Deerfield Beach, Fla.) (2012-06-13)
Gibum Kwon, Arun K Kota, Yongxin Li, Ameya Sohani, Joseph M Mabry, Anish Tuteja
ABSTRACT

In this work, the first-ever membrane-based single unit operation that enables gravity driven, on-demand separation of various oil-water mixtures is developed. Using this methodology, the on-demand separation of free oil and water, oil-in-water emulsions, and water-in-oil emulsions is demonstrated, with ≥99.9% separation efficiency. A scaled-up apparatus to separate larger quantities (several liters) of oil-water emulsions is also developed.