METHOD FOR TREATING ACESULFAME POTASSIUM WASTE LIQUID

WIPO Patent Application WO/2022/246863

A1

Provided is an method for treating an acesulfame potassium waste liquid, the method comprising: adding first liquid ammonia into an acesulfame potassium waste liquid, and subjecting same to a neutralization reaction in a closed reactor under a preset condition to obtain a first material; separating the first material into a first organic phase and a first water phase, and evaporating the first water phase until the water content reaches a preset water content so as to obtain a second material; adding second liquid ammonia into the second material, and subjecting same to a neutralization reaction in the closed reactor under a preset condition to obtain a third material; separating the third material into a second organic phase and a second water phase; recovering the first organic phase and the second organic phase as crude triethylamine products; and subjecting the second water phase to solid-liquid separation to obtain a crude ammonium sulfate product and a residual liquid. According to the method provided by the present application, the reaction is rapid, the conversion rate of triethylamine sulfate is high, and the reaction is carried out more thoroughly; and the process for treating an acesulfame potassium waste liquid is simplified, the treatment time is shortened, and the recovery efficiency of amine is improved.

ZHOU RUI (CN)
DING ZHEN (CN)
CHEN YONGXU (CN)
ZHENG RENFENG (CN)
YANG FENGBAO (CN)

PCT/CN2021/097011

December 01, 2022

May 28, 2021

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ANHUI JINHE IND CO LTD (CN)

C01C1/24; C07C209/84; C02F9/10; C07C209/00; C07C211/05; C02F103/36

CN112142602A	2020-12-29
CN102834352A	2012-12-19
CN112194293A	2021-01-08
CN105906026A	2016-08-31
DE3545196A1	1987-06-25

BEIJING LONGAN LAW FIRM (CN)

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