Title:
REFINING METHOD FOR ACESULFAME
Document Type and Number:
WIPO Patent Application WO/2022/056914
Kind Code:
A1
Abstract:
Provided is a refining method for acesulfame. The method comprises: adding hydrogen peroxide and activated carbon into an acesulfame-containing crude product solution, keeping same at a first preset temperature for a first preset time, and filtering same to obtain an acesulfame mother solution; concentrating the acesulfame mother solution to a preset concentration so as to obtain a concentrated solution, and leaving the concentrated solution to stand at a second preset temperature for a second preset time to form acesulfame crystal nucleuses, so as to obtain a crystal-nucleus-containing solution; subjecting the crystal-nucleus-containing solution to programmed cooling, so as to acquire a solution containing a large amount of acesulfame crystals; and subjecting the solution containing a large amount of acesulfame crystals to centrifugation, washing and drying, so as to acquire an acesulfame crystal product. The present invention has the beneficial effects of obtaining a high-quality and high-purity crystal product with low impurity content by means of controlling the crystallization procedure and process, thus significantly improving the purity and quality of the acesulfame crystals; and the process is simple, has mild and controllable conditions, has low technical requirements in terms of equipment and personnel, and is very suitable for large-scale industrial production.
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Inventors:
WANG CONGCHUN (CN)
CHEN YONGXU (CN)
SHEN XIAOFENG (CN)
CHEN CHAOHUI (CN)
SHEN DONGDONG (CN)
CHEN YONGXU (CN)
SHEN XIAOFENG (CN)
CHEN CHAOHUI (CN)
SHEN DONGDONG (CN)
Application Number:
PCT/CN2020/116530
Publication Date:
March 24, 2022
Filing Date:
September 21, 2020
Export Citation:
Assignee:
ANHUI JINHE IND CO LTD (CN)
International Classes:
C07D291/06
Foreign References:
| CN107459497A | 2017-12-12 | |||
| CN111518057A | 2020-08-11 | |||
| CN109694337A | 2019-04-30 | |||
| CN103265467A | 2013-08-28 | |||
| CN106496159A | 2017-03-15 | |||
| US20200079746A1 | 2020-03-12 |
Other References:
"Chemical Separation Technology", 31 January 2014, CHEMICAL INDUSTRY PRESS, CN, ISBN: 978-7-304-05788-6, article KANG, YANFANG: "Operation and Control of Crystallization Processes", pages: 28 - 31, XP009535922
YU JIANG: "Synthesis Research of Sweetener Acesulfame-K", SCIENCE AND TECHNOLOGY INNOVATION HERALD, vol. 35, 2008, pages 9
E. MARCUSJ. K. CHAN: "Novel Confensation Products of Diketene", J. ORG. CHEM., vol. 32, no. 9, 1967, pages 2881 - 2887
See also references of EP 4206190A4
YU JIANG: "Synthesis Research of Sweetener Acesulfame-K", SCIENCE AND TECHNOLOGY INNOVATION HERALD, vol. 35, 2008, pages 9
E. MARCUSJ. K. CHAN: "Novel Confensation Products of Diketene", J. ORG. CHEM., vol. 32, no. 9, 1967, pages 2881 - 2887
See also references of EP 4206190A4
Attorney, Agent or Firm:
BEIJING LONGAN LAW FIRM (CN)
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