Title:
METHOD FOR LINKAGE RECOVERY OF ORGANIC ACID IN AQUEOUS ORGANIC ACID SOLUTION
Document Type and Number:
WIPO Patent Application WO/2020/108066
Kind Code:
A1
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%. The method is simple, and has a low energy consumption and a good recovery effect with respect to the single recovery of a low concentration aqueous organic acid solution; and the method does not need to newly add an azeotrope agent and saves on costs with respect to the single recovery of a high concentration aqueous organic acid solution. In such a cooperating manner, a reagent during recovery can be fully utilized, energy consumption is reduced, and a process is simplified.
Inventors:
ZHANG RUIZHE (CN)
LIU YUNSI (CN)
MIN YU (CN)
GAN ZIFENG (CN)
LIU YUNSI (CN)
MIN YU (CN)
GAN ZIFENG (CN)
Application Number:
PCT/CN2019/108187
Publication Date:
June 04, 2020
Filing Date:
September 26, 2019
Export Citation:
Assignee:
GUANGZHOU YINNOVATOR BIOTECH CO LTD (CN)
International Classes:
C07C51/48; C07C51/42; C07C53/02; C07C53/08
Foreign References:
CN109384666A | 2019-02-26 | |||
CN102344353A | 2012-02-08 | |||
CN106397184A | 2017-02-15 | |||
CN101792386A | 2010-08-04 | |||
JPH11228486A | 1999-08-24 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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