Olefins-Paraffins Separation Process by Membrane

An olefins-paraffins separation process in feed stream containing hydrocarbons with 2 to 4 carbon atoms, comprising the following step:

• a. feeding the feed stream containing hydrocarbons with 2 to 4 carbon atoms into distillation column and membrane unit, characterized in that said membrane unit comprising at least 2 stages of the membrane unit connected to the distillation column at the feed of the distillation column and at least 2 stages of the membrane unit connected to the side draw of the distillation column, wherein said membrane unit comprising membrane that is specific for olefins;
• and
• b. separating a portion of feed stream that is passed from the membrane unit, wherein at least 1 stream is the product stream that mostly comprising olefins and at least 1 stream that mostly comprising paraffins;
• wherein said membrane unit comprises the facilitated transport membrane.