C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/714.5, 260/7
C07C 9/10 (2006.01) C07C 5/03 (2006.01) C07C 5/27 (2006.01) C07C 11/04 (2006.01)
Patent
CA 1108654
UNITED STATES PATENT APPLICATION OF: JACOB N. RUBIN and FREDERICK B. SEUFERT FOR: A PROCESS FOR CONVERTING UNSATURATED C4 HYDROCARBONS INTO NORMAL BUTANE ABSTRACT OF THE DISCLOSURE A process for converting unsaturated C4 hydrocarbons into normal butane is provided. Unsaturated C4 hydrocarbons are introduced into a hydrogenation zone wherein they are con- verted into a stream comprised of normal butane and isobutane. the normal butane and isobutane stream is discharged from the hydrogenation zone and directed into a separation zone wherein the normal butane is separated from the isobutane. The normal butane is recovered from the separation zone and the isobutane is directed into an isomerization zone wherein a portion of the isobutane is converted into normal butane. The mixture of normal butane and isobutane formed in the isomerization zone is there- after returned to the separation zone for further recovery of additional amounts of normal butane. In a preferred application of the process, the feed stream of unsaturated C4 hydrocarbons is obtained from the butene raffi- nate by-product of a butadiene recovery unit which derives feed from an ethylene production facility and the hydrogen introduced into the hydrogenation zone is obtained from the demethanization zone of the ethylene facility. The normal butane produced by the process then becomes one of the feedstocks of the ethylene produc- tion process to increase the yield of ethylene produced thereby.
324759
Rubin Jacob N.
Seufert Frederick B.
Macrae & Co.
Stone & Webster Engineering Corporation
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