公开(公告)号：US20210395211A1

公开(公告)日：2021-12-23

申请号：US17287628

申请日：2019-10-23

Applicant: Dow Global Technologies LLC

Inventor： Amanda M. Goodman ,  Jianping Zeng ,  Barry Archer ,  Christophe R. Laroche

IPC: C07D295/088 ,  B01D3/00 ,  B01D3/14

Abstract: Embodiments relate to a continuous process for the production of hydroxyethylpiperazine that includes feeding neat piperazine, recycled piperazine, and ethylene oxide to a reactor to form crude hydroxyethylpiperazine, in which the reactor is a continuous stirred tank reactor or a plug flow reactor. The process further includes continuously feeding the crude hydroxyethylpiperazine from the reactor to a distillation system that includes at least one distillation column, the distillation system produces at least a recycled piperazine stream and a hydroxyethylpiperazine stream, the recycled piperazine stream includes the recycled piperazine that is fed to the reactor to form the crude hydroxyethylpiperazine, and the hydroxyethylpiperazine stream includes at least 60 wt % of hydroxyethylpiperazine based on a total weight of the hydroxyethylpiperazine stream.

公开(公告)号：US11987562B2

公开(公告)日：2024-05-21

申请号：US17287628

申请日：2019-10-23

Applicant: Dow Global Technologies LLC

Inventor： Amanda M. Goodman ,  Jianping Zeng ,  Barry Archer ,  Christophe R. Laroche

IPC: C07D295/088 ,  B01D3/00 ,  B01D3/14

CPC classification number: C07D295/088 ,  B01D3/009 ,  B01D3/143

Abstract: Embodiments relate to a continuous process for the production of hydroxyethylpiperazine that includes feeding neat piperazine, recycled piperazine, and ethylene oxide to a reactor to form crude hydroxyethylpiperazine, in which the reactor is a continuous stirred tank reactor or a plug flow reactor. The process further includes continuously feeding the crude hydroxyethylpiperazine from the reactor to a distillation system that includes at least one distillation column, the distillation system produces at least a recycled piperazine stream and a hydroxyethylpiperazine stream, the recycled piperazine stream includes the recycled piperazine that is fed to the reactor to form the crude hydroxyethylpiperazine, and the hydroxyethylpiperazine stream includes at least 60 wt % of hydroxyethylpiperazine based on a total weight of the hydroxyethylpiperazine stream.

公开(公告)号：US20230227388A1

公开(公告)日：2023-07-20

申请号：US17999993

申请日：2021-05-27

Applicant: Dow Global Technologies LLC

Inventor： Michael A. Brammer ,  Sean W. Ewart ,  Wanglin Yu ,  Bruce D. Hook ,  Sally Demaio-Turner ,  Sung-Yu Ku ,  Yujun Liu ,  Jin Liu ,  Jianping Zeng

IPC: C07C31/125 ,  C07C47/02 ,  C07C29/74 ,  C07C29/34 ,  C07C29/17 ,  B01J31/18

CPC classification number: C07C31/125 ,  C07C47/02 ,  C07C29/74 ,  C07C29/34 ,  C07C29/172 ,  B01J31/185

Abstract: The present disclosure provides a process. In an embodiment, the process includes providing a purge stream composed of octene isomers. The process includes subjecting the purge stream to hydroformylation conditions, and forming a reaction product composed of nonanals.