Production method of nadroparin calcium
A production method and heparin calcium technology, applied in the field of biomedicine, can solve the problems of poor product stability, uncontrollable product yield of raw materials, etc., and achieve the effects of improving product yield, shortening preparation cycle, and reducing cost input.
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preparation Embodiment 1
[0034] Specific steps:
[0035]a) Enzymolysis: Take 1000g of crude heparin sodium, add 10kg of water to dissolve it, adjust the pH value of the feed solution to 8.2 with 20% (w / v) calcium hydroxide solution, adjust the temperature of the feed solution to 37°C, and add papaya respectively 7g of protease and 4g of ribonuclease II were stirred and reacted for 10 hours, centrifuged to remove the precipitate, and the supernatant was filtered with a plate and frame filter to collect 10 L of filtrate. ;
[0036] b) Oxidation: Control the temperature of the filtrate obtained in step a) to 37° C., adjust the pH value of the filtrate to 10.1 with 20% (w / v) calcium hydroxide solution, add 30 ml of hydrogen peroxide, and stir and react at room temperature for 8 hours to obtain a purified solution;
[0037] c) Ultrafiltration to remove impurities: adjust the purified solution obtained in step b to pH 7.2 with 4 mol / L hydrochloric acid, then perform tangential flow ultrafiltration, and sel...
preparation Embodiment 2
[0048] Specific steps:
[0049] a) Enzymolysis: Take 1000g of crude heparin sodium, add 11kg of water to dissolve it, adjust the pH value of the feed solution to 8.3 with 20% (w / v) calcium hydroxide solution, adjust the temperature of the feed solution to 38°C, and add papaya respectively 6g of protease and 5g of ribonuclease II were stirred and reacted for 10 hours, centrifuged to remove the precipitate, and the supernatant was filtered with a plate and frame filter to collect 11 L of filtrate. ;
[0050] b) Oxidation: Control the temperature of the filtrate obtained in step a) to 39° C., adjust the pH value of the filtrate to 9.5 with 20% (w / v) calcium hydroxide solution, add 35 ml of hydrogen peroxide, and stir and react at room temperature for 7 hours to obtain a purified solution;
[0051] c) Ultrafiltration to remove impurities: adjust the pH of the purified solution obtained in step b to 6.8 with 4 mol / L hydrochloric acid, then perform tangential flow ultrafiltration, ...
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