Larry J Nash

US Patent:

60932856, Jul 25, 2000

Filed:

Aug 31, 1998

Appl. No.:

9/144117

Inventors:

Daniel T. Fernald - Houston TX
Stephen L. Ege - Houston TX
Si M. Nguyen - Houston TX
Richard Peacock - Missouri City TX
Larry L. Nash - Bartlesville OK
George A. Moczygemba - Bartlesville OK

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

B01D 300
C07C 704
C07C 5144

US Classification:

203 14

Abstract:

A system and process for purifying a 1,3-butadiene feedstock containing 1,3-butadiene and various impurities by first introducing the 1,3-butadiene feedstock stream to a separation column to produce an intermediate product stream containing 1,3-butadiene and residual impurities and then introducing the produced intermediate product stream through a condenser to a suitable dryer for removing residual impurities from the intermediate product stream and thereby forming a purified 1,3-butadiene stream. The separation column separates an overhead stream, containing 1,3-butadiene and impurities such as propadiene, water and oxygen, and a bottoms stream, containing impurities such as polymerization inhibitor, ethyl acetylene, 1,3-butadiene dimer, pentane and 1,2-butadiene, from the intermediate product stream which leaves the separation column in the form of a vapor side draw stream.