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Title:
METHOD FOR PREPARING ACESULFAME POTASSIUM
Document Type and Number:
WIPO Patent Application WO/2022/246869
Kind Code:
A1
Abstract:
A method for preparing acesulfame potassium, the method comprising: pressing an acetoacetamide-N-sulfonic acid triethylamine salt solution and a cyclizing agent solution into a Venturi reactor via different inlets, mixing same at a mixing section and a diffusion section of the Venturi reactor, and then spraying the obtained mixture into a flow reactor, wherein the cyclizing agent solution is formed by dissolving sulfur trioxide in a first organic solvent; subjecting the mixture passing through the flow reactor to a sulfonation cyclization reaction under the action of a loaded solid alkali heterogeneous catalyst preset in the flow reactor, and the obtained sulfonation cyclization product entering a hydrolysis reactor; subjecting the sulfonation cyclization product and a hydrolysis agent preset in the hydrolysis reactor to a hydrolysis reaction to obtain a hydrolysis product solution; and adding potassium hydroxide into an organic phase of the hydrolysate solution for a salt-forming reaction to obtain the acesulfame potassium. According to the preparation method, the purity and yield of the acesulfame potassium are improved, and a post-treatment process for the acesulfame potassium is simplified.

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Inventors:
ZHOU RUI (CN)
DING ZHEN (CN)
CHEN YONGXU (CN)
YANG FENGBAO (CN)
LIU GANG (CN)
Application Number:
PCT/CN2021/097017
Publication Date:
December 01, 2022
Filing Date:
May 28, 2021
Export Citation:
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Assignee:
ANHUI JINHE IND CO LTD (CN)
International Classes:
C07D291/06; B01J23/04; B01J31/26
Foreign References:
CN111377882A2020-07-07
CN112110876A2020-12-22
CN111511724A2020-08-07
CN86105506A1987-04-29
CN109705058A2019-05-03
CN103613566B2016-03-23
CN111511724A2020-08-07
CN112110876A2020-12-22
CN112142687A2020-12-29
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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