US 12,281,071 B2
Systems and methods for enhancing the recovery of styrene
Douglas S. Hubbell, Sudbury, MA (US); and Slawomir A. Oleksy, Billerica, MA (US)
Assigned to T.EN Process Technology, Inc., Houston, TX (US)
Filed by T.EN Process Technology, Inc., Houston, TX (US)
Filed on Jul. 22, 2022, as Appl. No. 17/870,821.
Prior Publication US 2024/0026231 A1, Jan. 25, 2024
Int. Cl. C07C 7/00 (2006.01); C07C 7/05 (2006.01); C10G 31/06 (2006.01); C10G 31/08 (2006.01)
CPC C07C 7/00 (2013.01) [C07C 7/005 (2013.01); C07C 7/05 (2013.01); C10G 31/06 (2013.01); C10G 31/08 (2013.01); C10G 2300/1096 (2013.01); C10G 2300/4012 (2013.01); C10G 2300/807 (2013.01); C10G 2400/30 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for recovery of residual styrene, comprising:
recovering a hot liquid residue stream from a flash drum of a styrene monomer purification finishing system,
wherein the hot liquid residue stream comprises residual styrene, and
wherein the styrene monomer purification finishing system comprises a distillation column upstream of the flash drum;
feeding the hot liquid residue stream and a gas to a stripping vessel downstream of the flash drum to produce a vaporized styrene stream and a final liquid residue stream,
wherein the final liquid residue stream has a lower concentration of styrene than the hot liquid residue stream; and
returning the vaporized styrene stream to the distillation column to obtain a styrene monomer product.