公开(公告)号：MY110197A

公开(公告)日：1998-02-28

申请号：MYPI19940410

申请日：1994-02-22

Applicant: THE M W KELLOGG COMPANY

Inventor： WILLIAM CHARLES PETTERSON ,  CHARLES ARTHUR DURR ,  DAVID ALAN COYLE

IPC: C10L3/06 ,  C10G5/06 ,  F25J3/06 ,  C10L3/00 ,  C10L3/12 ,  F25J1/02 ,  F25J3/02

Abstract: A METHOD FOR PRETREATING A NATURAL GAS STREAM USING A SINGLE SCRUB COLUMN TO REMOVE FREEZABLE C5+ COMPONENTS AND PROVIDE AN LNG PRODUCT WHICH CAN BE CONVENIENTLY HANDLED AND SHIPPED IS DISCLOSED. THE METHOD COMPRISES FEEDING A NATURAL GAS STREAM TO A FEED POINT ON A SCRUB COLUMN OPERATED SUBSTANTIALLY AS AN ABSORPTION COLUMN WHEREIN THE HEAVY COMPONENTS ARE ABSORBED FROM THE FEED GAS USING A LIQUID REFLUX ESSENTIALLY FREE OF SUCH C5+ COMPONENTS. THE FEED CAN BE VAPOR INTRODUCED AT A LOW POINT ON THE COLUMN, OR CAN BE OPTIONALLY SPLIT, COOLED AND/OR EXPANDED AND INTRODUCED AT ONE OR MORE FEED POINTS ON THE COLUMN. THE REFLUX STREAM CAN BE OVERHEAD VAPOR CONDENSATE HAVING A TEMPERATURE OF ABOUT -40?C, OR METHANE-RICH LNG OR A COMBINATION OF LNG AND VAPOR CONDENSATE.(FIG. 1)

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)