Olefin-polymethylsiloxane membrane composition for oxygenates removal from wastewater by pervaporation

• Published in: Journal of physics. Conference series Vol. 1134; no. 1; pp. 12017 - 12024
• Main Authors: Grushevenko, E A, Knyazeva, A A, Podtynnikov, I A, Sharova, O A, Borisov, I L
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.11.2018
• Subjects: Aqueous solutions; Butanol; Composition; Ethanol; Hydrosilylation; Membranes; Pervaporation; Polydimethylsiloxane; Separation; Wastewater treatment
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1134/1/012017

To separate oxygenates from aqueous effluents by pervaporation first obtained and studied composite membrane material based on 1-hexene and polymethylsiloxane (C6). Synthesis of the composite membrane material was performed by hydrosilylation reaction between polymethylhydrosiloxane, 1-hexene and 1,7 octadiene. The synthesized composite membrane material characterized by FTIR spectroscopy and studied its sorption properties in relation to the alcohols: ethanol, n-propanol and n-butanol. It was found that affinity of the composite membrane materials to alcohols is increasing with an increase in their molecular weight. First studied pervaporation properties of the composition C6 and compares its separation characteristics of the commercial high-permeability membrane polymer polydimethylsiloxane (PDMS) and compositions based polymethylsiloxane and 1-octene (polyoctylmethylsiloxane) for the task allocation of n-butanol, n-propanol and ethanol from dilute aqueous solutions by vacuum pervaporation. It is shown that a C6-based membrane is most effective in the separation of oxygenate-water mixtures by vacuum pervaporation. When compared to the PDMS flow of butanol, the membrane based on composition C6 exhibits a high separation factor of butanol-water 78.