公开(公告)号：US20240158325A1

公开(公告)日：2024-05-16

申请号：US18281451

申请日：2022-03-11

Applicant: BASF SE

Inventor： Andreas KELLER ,  Hans HASSE ,  Rupert WAGNER ,  Bernhard BRUNNER ,  Matthias SCHULT ,  Stephan MAURER ,  Heiko HALLMANN ,  Maximilian DYGA

IPC: C07C29/80 ,  B01D3/14

CPC classification number: C07C29/80 ,  B01D3/143

Abstract: A process for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the process comprising subjecting the stream of crude isoprenol or an isoprenol containing fraction thereof to distillation in a low-boiler separation tower operated at a pressure of 2.5 bara or higher to obtain a distillate stream containing aqueous formaldehyde and a bottoms stream containing isoprenol. The process of the invention allows for obtaining isoprenol essentially free of formaldehyde. Further provided is a plant for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the plant comprising a first low-boiler separation tower, a second low-boiler separation tower, and a finishing tower.