公开(公告)号：US20210340086A1

公开(公告)日：2021-11-04

申请号：US17271597

申请日：2020-05-07

Applicant: SUZHOU SUZHEN BIOENGINEERING CO., LTD

Inventor： Ji An LUO ,  Guozhu SHI ,  Yun ZHANG ,  Bin LIU ,  Juanjuan QIAN ,  Juan DING ,  Wei WANG ,  Wei JI

IPC: C07C29/78 ,  C07C29/76 ,  C12P7/18

Abstract: A method for extracting polyol from a fermentation process is disclosed. The preparing method includes rectifying and purifying PDO (1,3-propanediol) from a polyol fermentation broth after concentration to form a steam condensate, wherein the concentration is a evaporative dehydration; and filtering the steam condensate through a reverse osmosis membrane to form a concentrated solution, wherein the retentate of the reverse osmosis flows back to the evaporative dehydration, and the penetrant of the reverse osmosis can be reused as a fermentation ingredient, as cleaning water or for sewage treatment; and the water content of the concentrated solution after the evaporative dehydration is 5-25 wt %; and the yield of PDO is ≥99.5%. The preparing method meets the requirements of water resources recycling, reduces the production loss of PDO and BDO (2,3-butanediol) during the concentration, and greatly cuts down on the amount of wastewater.