Influence of the Molecular Weight of PEG on the Polymer/Salt Phase Diagrams of Aqueous Two-Phase Systems

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Kamila Wysoczanska (Author) Other; Eugénia A. Macedo (Author) FEUP

Journal

Title: Journal of Chemical & Engineering Data

Vol. 61 No. 12

Pages: 4229-4235

ISSN: 0021-9568

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 9 Citations

ISI Web of Science

Scopus

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00M-A4Z

DOI: 10.1021/acs.jced.6b00591

Abstract (EN): Binodal data for systems composed by polyethylene glycol (PEG) (4000, 6000, or 8000) and salt (potassium citrate, potassium sodium tartrate) were obtained using the cloud point method, at T = 298.15 K. Merchuk equation was applied for the fitting of binodal curves. Tie-lines for systems of PEG (4000, 6000)-potassium citrate and PEG (4000, 6000, 8000)-potassium sodium tartrate were determined by electrical conductivity and lyophilization, and correlated using Othmer-Tobias and Bancroft equations, to verify the reliability of the measured tie-lines. Data were compared with that of previous studies reported in the literature, giving an indication of which system is more efficient in terms of separation, taking into account possible combinations of salt's cations and PEGs of different molecular weight chosen for ATPS.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7