Title:
METHOD FOR PURIFYING BIOLOGICAL DUST SUPPRESSANT BY MEANS OF TWO-STAGE ULTRAFILTRATION
Document Type and Number:
WIPO Patent Application WO/2024/074135
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for purifying a biological dust suppressant by means of two-stage ultrafiltration, wherein a target product is separated and purified by means of two-stage ultrafiltration utilizing the differences of various substances in a fermentation liquid in terms of physical characteristics, such as solubility and molecular morphology. The method comprises: subjecting a fermentation liquid to a centrifugal pretreatment to separate off insoluble substances such as microbial cells; allowing the centrifuged fermentation liquid to pass through a first-stage ultrafiltration membrane, thereby intercepting polysaccharides, lactic acid, biological dust suppressant molecules in an aggregation form, etc., the molecular weights of which being larger than 20 kD; adding organic solvents of methanol and ethyl acetate to the retention liquid to dilute same, and further filtering the resulting liquid by means of an ultrafiltration membrane capable of intercepting substances which have a molecular weight greater than 10 kD to obtain a liquid product; and finally subjecting same to rotary evaporation and constant-temperature drying to prepare a solid purified material. The present purification method fully utilizes the differences of various components in the fermentation liquid in terms of physical properties, can effectively improve the separation and purification efficiency and purity of the product, reduce toxic and harmful substances generated during the separation and purification process and lower the cost of the production process, and can be widely used as a purification process during the production and preparation processes of biological dust suppression materials.
Inventors:
WANG HETANG (CN)
ZHANG QI (CN)
WANG YUXUAN (CN)
ZHANG QI (CN)
WANG YUXUAN (CN)
Application Number:
PCT/CN2023/123220
Publication Date:
April 11, 2024
Filing Date:
October 07, 2023
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
B01D61/14; B01D3/08; C09K3/22
Foreign References:
| CN115475525A | 2022-12-16 | |||
| CN103865489A | 2014-06-18 | |||
| CN104397321A | 2015-03-11 | |||
| CN106590533A | 2017-04-26 | |||
| CN110331179A | 2019-10-15 |
Attorney, Agent or Firm:
BEIJING SHENGXUN IP AGENCY CO., LTD. (CN)
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