Separation of organic mixtures by pervaporation using crosslinked rubber membranes

S. Ray, S. K. Ray

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Natural rubber (NR) and poly(styrene-co-butadiene) rubber (SBR) has been crosslinked with sulfur and accelerator with three different doses of varied accelerator to sulfur ratios to obtain three crosslinked membranes from each of these two rubbers (NR-1, NR-2 and NR-3 and SBR-1, SBR-2 and SBR-3). These six rubber membranes were used for pervaporative separation of toluene-methanol mixture up to 10 wt% of toluene in feed. It has been found that with increase in accelerator to sulfur ratio from membrane-3 to membrane-1, the vulcanization system shifts from conventional to efficient system resulting in higher degree of crosslink density and permeation selectivity. All of these membranes showed reasonably good range of flux (45.26 gm/m2 h for NR-3 to 12.0 gm/m2 h for SBR-1) and separation factor (162 for SBR-1 to 35.12 for NR-3) for 0.55 wt% of toluene in feed. Among these membranes NR-1 and SBR-1 with highest crosslink density showed maximum separation factor for toluene along with good flux. It has also been found that for comparable crosslink density SBR membranes showed better separation factor than NR membranes.

Original languageEnglish (US)
Pages (from-to)132-145
Number of pages14
JournalJournal of Membrane Science
Volume270
Issue number1-2
DOIs
StatePublished - Feb 15 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Keywords

  • Crosslink density
  • Pervaporation
  • Rubber membranes
  • Separation factor
  • Vulcanization system

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