Method for recovering natamycin
A technology of natamycin and waste liquid, applied in chemical instruments and methods, preparation of sugar derivatives, sugar derivatives, etc., can solve the problems of slow precipitation process, low total extraction rate, large recovery loss, etc., and achieve improved recovery The effect of high efficiency and simple process
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Embodiment 1
[0018] The fermented culture of Streptomyces natamycin was extracted with ethanol to obtain 330 mL of waste mixture, the content of which was 2.5 g / L of natamycin. The pH of the waste liquid was adjusted to 6.5 with hydrochloric acid, and the Natamycin Mycin crystals were separated out, and the supernatant liquid was siphoned or decanted to obtain 9 mL of turbid mud, which was washed twice with 5 mL of deionized water, centrifuged or filtered once for each washing to obtain a solid, and then washed three times with 15 mL of 40% ethanol solution (The above washing liquid was merged into the supernatant liquid) to obtain a white solid, which was dried under reduced pressure at 40° C. to obtain 0.604 g of solid substance. The purity of natamycin was 71% according to HPLC analysis, and the recovery rate was 52%.
[0019] After the precipitation, a total of 341 mL of clear liquid was obtained, of which the concentration of natamycin was 1.1 g / L. Distilled under reduced pressure at 5...
Embodiment 2
[0022] The fermented culture of Streptomyces natamycin was extracted with acetone to obtain 650mL of waste mixture, and its natamycin content was 2.9g / L. The pH of the above liquid was adjusted to 7.0 with NaOH, and after standing at 4°C for 30h, crystals precipitated Afterwards, filter with an air filter to obtain white mud, wash 3 times with deionized water, and then wash 3 times with 50% acetone solution (the above washing solution is incorporated into the supernatant), to obtain off-white solid, 40 ° C Drying under reduced pressure yielded 1.23 g of solid substance. According to HPLC analysis, the purity of natamycin was 75%, and the recovery rate was 49%.
[0023] After precipitation, a total of 668 mL of clear liquid was obtained, in which the concentration of natamycin was 1.4 g / L. Distilled under reduced pressure at 40 ° C, collected step by step, first distilled 350 mL of high-concentration acetone liquid, continued distillation until the remaining liquid was 72 mL, ad...
Embodiment 3
[0026] Streptomyces fermentation culture was extracted with methanol to obtain 1550mL of waste mixture, the natamycin content of which was 4.5g / L, the pH of the above liquid was adjusted to 6.4, and after standing at 10°C for 48h, crystals were precipitated, and the supernatant was decanted solution to obtain a white mud, washed twice with deionized water, and then washed twice with 45% ethanol solution (the above washing solution was incorporated into the supernatant), to obtain a off-white solid, which was dried under reduced pressure at 40 ° C. 4.62 g of solid matter was obtained, the purity of natamycin was 68% by HPLC analysis, and the recovery rate was 45%.
[0027] After the precipitation, a total of 1580 mL of clear liquid was obtained, in which the concentration of natamycin was 2.1 g / L. It was distilled under reduced pressure at 40 ° C and collected step by step. First, 980 mL of high-concentration methanol liquid was distilled, and continued distillation until the re...
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