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Krzyżaniak, Agnieszka; Schuur, Boelo; de Haan, André B.

Extractive recovery of aqueous diamines for bio‐based plastics production

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  • Medientyp: E-Artikel
  • Titel: Extractive recovery of aqueous diamines for bio‐based plastics production
  • Beteiligte: Krzyżaniak, Agnieszka; Schuur, Boelo; de Haan, André B.
  • Erschienen: Wiley, 2013
  • Erschienen in: Journal of Chemical Technology & Biotechnology, 88 (2013) 10, Seite 1937-1945
  • Sprache: Englisch
  • DOI: 10.1002/jctb.4058
  • ISSN: 0268-2575; 1097-4660
  • Entstehung:
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  • Beschreibung: <jats:title>Abstract</jats:title><jats:sec><jats:title>Background</jats:title><jats:p><jats:bold>This paper reports an extractant screening study for the recovery of putrescine (butylene‐1,4‐diamine, <jats:styled-content style="fixed-case">BDA</jats:styled-content>) and cadaverine (pentylene‐1,5‐diamine, <jats:styled-content style="fixed-case">PDA</jats:styled-content>) from aqueous solutions (e.g. fermentation broths) by liquid–liquid extraction. Several extractants were studied, including 4‐nonylphenol, 3,4‐bis((2‐ethylhexyl)oxy)phenol, di‐2‐ethylhexyl phosphoric acid (<jats:styled-content style="fixed-case">D2EHPA</jats:styled-content>), Versatic acid 1019, di‐nonyl‐naphthalene‐sulfonic acid (<jats:styled-content style="fixed-case">DNNSA</jats:styled-content>), and 4‐octylbenzaldehyde. 1‐Octanol, 2‐octyl‐1‐dodecanol and heptane were used as diluents, and temperatures of 25 °C and 65 °C</jats:bold>.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p><jats:bold>The most promising solvent is 4‐nonylphenol, hardly leaching into the aqueous raffinate (19 ppm), and showing <jats:styled-content style="fixed-case">BDA</jats:styled-content> distribution coefficients very strongly dependent on the extractant concentration, ranging from very low distribution ( D ∼ 1 at &lt;20 wt% 4‐nonylphenol in 1‐octanol at 25 °C) to high distribution (D &gt; 100) for pure 4‐nonylphenol at 25 °C. The strong dependency of the distribution on extract phase composition was applied to efficiently back‐extract up to 90% <jats:styled-content style="fixed-case">BDA</jats:styled-content> in a single step. To achieve this, the pure 4‐nonylphenol used in extraction was diluted to a 20 wt% dilution in 1‐octanol. The use of 4‐nonylphenol as extractant was also examined for <jats:styled-content style="fixed-case">PDA</jats:styled-content>, and higher distributions were observed than for <jats:styled-content style="fixed-case">BDA</jats:styled-content>, which can be attributed to the longer hydrocarbon chain of <jats:styled-content style="fixed-case">PDA</jats:styled-content></jats:bold>.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p><jats:bold>Recovery of diamines from aqueous medium can be accomplished in an effective way using 4‐nonylphenol as extractant. These results may be used to develop a bio‐based butylene‐1,4‐diamine production route. © 2013 Society of Chemical Industry</jats:bold></jats:p></jats:sec>