Title:
TREATMENT METHOD FOR ACESULFAME POTASSIUM WASTE LIQUID
Document Type and Number:
WIPO Patent Application WO/2022/246866
Kind Code:
A1
Abstract:
A treatment method for an acesulfame potassium waste liquid. The acesulfame potassium waste liquid is a waste liquid generated in preparation of acesulfame potassium by adopting a diketene-sulfur trioxide method. The treatment method comprises: a pH adjustment step: adding a first material flow into the acesulfame potassium waste liquid until the pH value of the acesulfame potassium waste liquid is not less than 13, so as to obtain a second material flow, wherein the first material flow is a residual liquid generated in the following crystallization step or a saturated sodium hydroxide or potassium hydroxide solution; a neutralization and separation step: adding a sodium hydroxide or potassium hydroxide solid into the first material flow, stirring until the sodium hydroxide or potassium hydroxide solid is completely dissolved, standing for a period of time to obtain an organic phase and an aqueous phase, and recycling the organic phase as a triethylamine crude product; and a crystallization step: crystallizing the aqueous phase, and filtering same to obtain sodium sulfate or potassium sulfate and the residual liquid.
Inventors:
ZHOU RUI (CN)
DING ZHEN (CN)
CHEN YONGXU (CN)
ZHENG RENFENG (CN)
YANG FENGBAO (CN)
DING ZHEN (CN)
CHEN YONGXU (CN)
ZHENG RENFENG (CN)
YANG FENGBAO (CN)
Application Number:
PCT/CN2021/097014
Publication Date:
December 01, 2022
Filing Date:
May 28, 2021
Export Citation:
Assignee:
ANHUI JINHE IND CO LTD (CN)
International Classes:
C07C209/00; C01D5/00; C01D5/16; C07C209/86; C07C211/05
Foreign References:
| CN101148300A | 2008-03-26 |
Other References:
CHEN ZIANG, LI HUA, CHEN HONG, LI SHAO-XIONG : "Treatment of Acesulfame-K Manufacturing Wastewater and Reclaim of Amine", ENVIRONMENTAL SCIENCE & TECHNOLOGY, vol. 26, no. 5, 28 September 2003 (2003-09-28), pages 3, XP093008563, ISSN: 1003-6504, DOI: 10.3969/j.issn.1003-6504.2003.05.015
XUE ZHANGHUI: "Study of Diketene, Acesulfame-K Wastewater Treatment Process Operation Evaluation and the Optimization of Pretreatment Process", ENGINEERING SCIENCE AND TECHNOLOGY I, CHINESE MASTER'S THESES FULL-TEXT DATABASE (ELECTRONIC JOURNAL), no. 4, 15 April 2012 (2012-04-15), XP093008566
XUE ZHANGHUI: "Study of Diketene, Acesulfame-K Wastewater Treatment Process Operation Evaluation and the Optimization of Pretreatment Process", ENGINEERING SCIENCE AND TECHNOLOGY I, CHINESE MASTER'S THESES FULL-TEXT DATABASE (ELECTRONIC JOURNAL), no. 4, 15 April 2012 (2012-04-15), XP093008566
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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