公开(公告)号：US3614872A

公开(公告)日：1971-10-26

申请号：US3614872D

申请日：1967-12-22

Applicant: TEXACO INC

Inventor： TASSONEY JOSEPH P ,  SCHLINGER WARREN G

IPC: C01B3/50 ,  F25J3/06 ,  F25J1/00 ,  F25J3/00

CPC classification number: F25J3/0625 ,  C01B3/506 ,  C01B2203/0475 ,  C01B2203/0485 ,  C01B2203/0495 ,  F25J3/0655 ,  F25J3/067 ,  F25J2205/66 ,  F25J2210/04 ,  F25J2230/80 ,  F25J2245/02 ,  F25J2270/02 ,  F25J2270/04 ,  F25J2280/10 ,  Y02C10/12 ,  Y02P20/152 ,  Y10S62/928 ,  Y10S62/931

Abstract: SUPERATMOSPHERIC AUTOREFRIGERATION PROCESS FOR SEPARATING A GASEOUS MIXTURE COMPRISING ESSENTIALLY HYDROGEN AND CARBON DIOXIDE INTO AN ENRICHED HYDROGEN PRODUCT STREAM AND AN ENRICHED CARBON DIOXIDE PRODUCT STREAM. THE GASEOUS FEEDSTREAM AT A PRESSURE OF ABOUT 40 TO 250 ATMOSPHERES IS COOLED SO THAT 30 TO 95% OF THE CARBON DIOXIDE IS CONDENSED BY NONCONTACT COUNTERFLOW HEAT EXCHANGE WITH REFRIGERANTS, AND LIQUID CARBON DIOXIDE IS THEN SEPARATED FROM THE UNCONDENSED GASES. THE TWO DEPARTING PRODUCT STREAMS ARE SEPARATELY EMPLOYED AS REFRIGERANTS TO COOL SAID FRACTIONS OF THE FEEDSTREAM. THE TEMPERATURE OF THE ENRICHED CARBON DIOXIDE PRODUCT STREAM AND WHEN DESIRED, SUCH AS AT START-UP, THE TEMPERATURE OF THE ENRICHED HYDROGEN PRODUCT STREAM IS FURTHER REDUCED BY EXPANSION TO ABOUT THE TRIPLE POINT OF CARBON DIOXIDE (AND EVEN LOWER FOR THE ENRICHED HYDROGEN STREAM) WITHOUT SOLID FORMATION. A PORTION OF THE ENRICHED CARBON DIOXIDE PRODUCT STREAM IS RECYCLED TO THE INLET OF THE PROCESS AND COMBINED WITH THE FEEDSTREAM TO IMPROVE THE SEPARATION EFFICIENCY OF THE SYSTEM. THE ENRICHED HYDROGEN PRODUCT STREAM MAY BE USED DIRECTLY AS FEEDSTOCK FOR CHEMICAL SYNTHESIS OR MAY BE FURTHER PROCESSED TO MAKE PURE HYDROGEN.