DEVICE TO SEPARATE OLEFINS FROM PARAFFINS AND TO PURIFY OLEFINS AND USE THEREOF
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Sep 24, 2008
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Mar 24, 2006
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Abstract
The present invention discloses a device, which uses membranes, capable of separating olefins from paraffins. The device (1) considers an ultramicroporous ceramic membrane module, zeolite or silicate based, containing a fixed carrier of copper I or silver ions (#-complexant ions) inserted by ion exchange, or as a monolayer of CuCl, AgNO.sub.3, Cu or Ag.sup.+ (2). Olefins have higher diffusivity and affinity to the membrane than the remaining species, therefore the bicomponent permeation selectivity becomes reinforced when compared to the ideal permeation selectivity. The purification of olefins by removal of dienes and/or alkynes, is accomplished with a zeolite membrane functionalized with Ag.sup.+ and having a specific catalyst in the permeate side (4), e.g. palladium nanoparticulated, for catalyzing the hydrogenation of the permeating dienes and alkynes to the corresponding olefins, thus increasing the selectivity and the driving force of the separation.
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