IMPROVED METHOD FOR SEPARATION WHEN PRODUCING OLEFINS Russian patent published in 2012 - IPC C07C7/04 C07C7/09 C07C11/06 C07C5/327 C07C9/08 C10G7/00 

FIELD: chemistry.

SUBSTANCE: invention relates to versions of the method of separating olefin from paraffin in the product stream from a dehydrogenation system. One of the versions involves a step (a) for feeding a stream of material essentially consisting of a mixture of at least one olefin and at least one paraffin; (b) dividing the stream of material into a first portion and a second portion; (c) feeding the first portion of the stream of material into a first separation column for products and feeding the second portion the stream of material into a second separation column for products, where the first separation column for products works at a higher pressure than the second column for products; (d) feeding at least a portion of the stream of overhead product from the second separation column for products into a heat pump with compression of the stream of the overhead product of the second product separator; and (e) feeding steam from at least one steam turbine, which activates the heat pump, into the reboiler of the first separation column for products.

EFFECT: extraction of a high-purity propylene product with lower power consumption.

17 cl, 3 dwg