Recovery method of mother liquor in preparation process of glucosamine sulfate and sodium chloride double salt
The invention discloses a recovery method of mother liquor in the preparation process of glucosamine sulfate and sodium chloride double salt. The recovery method comprises the following steps: (1) recovering organic precipitants in refined mother liquor of a glucosamine hydrochloride crude product a...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a recovery method of mother liquor in the preparation process of glucosamine sulfate and sodium chloride double salt. The recovery method comprises the following steps: (1) recovering organic precipitants in refined mother liquor of a glucosamine hydrochloride crude product and crystallized mother liquor after salt-forming reaction of the glucosamine sulfate and sodium chloride double salt, mixing, controlling the solid content, reducing the pressure and evaporating to remove part of water; (2) adding an extracting agent to extract impurities and adding activated carbon into a water phase to decolor; (3) weighing a decoloring solution, sampling and detecting the contents of glucosamine, sulfate ions and chloride ions, and calculating the respective contents; (4) adding quantitative anhydrous sodium sulfate into the decoloring solution and performing temperature rise reaction; (5) controlling the temperature and the dripping speed, adding an organic precipitant, reducing the temperature |
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