Invention Grant
- Patent Title: Method for linkage recovery of organic acid in aqueous organic acid solution
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Application No.: US17257375Application Date: 2019-09-26
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Publication No.: US11667597B2Publication Date: 2023-06-06
- Inventor: Ruizhe Zhang , Yunsi Liu
- Applicant: GUANGZHOU YINNOVATOR BIOTECH CO., LTD.
- Applicant Address: CN Guangzhou
- Assignee: GUANGZHOU YINNOVATOR BIOTECH CO., LTD.
- Current Assignee: GUANGZHOU YINNOVATOR BIOTECH CO., LTD.
- Current Assignee Address: CN Guangzhou
- Agency: Nexsen Pruet, PLLC
- Agent David S. Bradin
- Priority: CN 1811418227.2 2018.11.26
- International Application: PCT/CN2019/108187 2019.09.26
- International Announcement: WO2020/108066A 2020.06.04
- Date entered country: 2020-12-31
- Main IPC: C07C51/48
- IPC: C07C51/48 ; C07C51/46 ; C07C51/42 ; C07C49/303 ; C07F9/113 ; C07C53/02 ; C07C53/08

Abstract:
Disclosed is a method for linkage recovery of an organic acid in an aqueous organic acid solution. The method comprises: mixing a solution with an organic acid concentration lower than 20 wt % with a specific extractant and then subjecting same to counter-current extraction so as to obtain an extract phase and a raffinate phase; and subjecting the extract phase together with a solution with an acid concentration higher than 70 wt % to an azeotropic rectification so as to recover an organic acid. When the concentration of the aqueous organic acid solution is 20 wt %-70 wt %, the aqueous organic acid solution is extracted and concentrated to make the concentration of the aqueous organic acid solution higher than 70 wt %.
Public/Granted literature
- US20210122695A1 METHOD FOR LINKAGE RECOVERY OF ORGANIC ACID IN AQUEOUS ORGANIC ACID SOLUTION Public/Granted day:2021-04-29
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