US 11,999,672 B2
High purity isoamylene production from tertiary amyl methyl ether decomposition
Rosette Barias, Houston, TX (US); Liang Chen, Houston, TX (US); and Michael Jon Scott, Houston, TX (US)
Assigned to LUMMUS TECHNOLOGY LLC, Houston, TX (US)
Filed by LUMMUS TECHNOLOGY LLC, Houston, TX (US)
Filed on Sep. 9, 2022, as Appl. No. 17/930,905.
Application 17/930,905 is a division of application No. 17/453,241, filed on Nov. 2, 2021, granted, now 11,465,949.
Claims priority of provisional application 63/108,665, filed on Nov. 2, 2020.
Prior Publication US 2023/0002294 A1, Jan. 5, 2023
Int. Cl. C07C 1/20 (2006.01); C07C 7/04 (2006.01); C07C 7/10 (2006.01)
CPC C07C 1/20 (2013.01) [C07C 7/04 (2013.01); C07C 7/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system for producing a high purity isoamylene stream, the system comprising:
a purification zone comprising a divided wall distillation column configured to receive a crude tertiary amyl ether from a feed source, the divided wall distillation column configured to separate the crude tertiary amyl ether into an overhead lights stream, a bottom heavies stream, and a tertiary amyl ether containing side draw stream;
a decomposition reactor containing a decomposition catalyst configured to convert the tertiary amyl ether as a vapor into isoamylene and alcohol and to produce a reaction effluent;
a separation zone configured to receive the reaction effluent and to separate the reaction effluent into an alcohol stream, a vent stream, a heavy oxygenate stream, and an isoamylene product stream.