公开(公告)号：MY113161A

公开(公告)日：2001-12-31

申请号：MYPI19950822

申请日：1995-03-31

Applicant: THE M W KELLOGG COMPANY

Inventor： VIJENDER KUMAR VERMA ,  WILLIAM CHARLES PETTERSON ,  CONG XUAN DINH ,  ASHUTOSH RASTOGI

IPC: F25J3/02 ,  C01B3/50 ,  C10G70/04

Abstract: A METHOD IS DESCRIBED FOR RECOVERING OLEFINS BY CONDENSATION FROM THE REACTION EFFLUENT STREAM FROM A CRACKING FURNACE CONTAINING OLEFINS AND HYDROGEN WHEREIN A MEMBRANE SEPARATOR IS EMPLOYED TO REJECT THE HYDROGEN FROM THE REACTION EFFLUENT STREAM. IN SUCH A MANNER, THE DEW POINT TEMPERATURE OF THE STREAM CAN BE INCREASED AND THE ENERGY REQUIRED TO PROVIDE REFRIGERATION FOR OLEFIN CONDENSATION CAN BE REDUCED. THE METHOD COMPRISES PRIMARY CONDENSATION, VAPOR-LIQUID SEPARATION AND MEMBRANE HYDROGEN REJECTION STEPS FOLLOWED BY A SERIES OF CASCADED CHILLING AND VAPOR-LIQUID SEPARATION STEPS. CONDENSATE RECOVERED IS PROCESSED IN A DEMETHANIZER TO SEPARATE LIGHT END COMPONENTS. ALSO DISCLOSED IS AN OLEFINS PLANT EMPLOYING A MEMBRANE SEPARATOR FOR REJECTING HYDROGEN TO ENHANCE THE ENERGY EFFICIENCY AND/OR FACILITATE THE EXPANSION OF PLANT CAPACITY..(FIG. 2)