Because of the narrow boiling point range of alkenes and the corresponding alkanes, which makes their separation by conventional means such as distillative fractionation tedious, expensive and inefficient, membrane technique can be applied to this problem with advantage and greater separation efficiency. Use has been made of the complexion reaction between Ag+ and alkenes in developing a membrane process for alkene/alkane separation. Especially the separation of butene from butane has been investigated. In this work the membrane consists of water-free blend of a silver salt with a modified polyethylene or fluorinated ion exchange material. The silver content was varied between 10 and 90 wt. percent. The result of a high silver salt concentration is an enormous increase in butene/butane selectivity, up to 3000. A possible transport mechanism of butene through the membrane will be discussed.
|Number of pages
|Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
|Published - 1989
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Polymers and Plastics