Method for improving crystallization yield of curcumin
A technology of curcumin and turmeric, applied in the field of separation and purification, can solve problems such as affecting the direct application of curcumin, low curcumin crystallization yield, unsuitable for industrialized production, etc., and achieves improved crystalline product quality, low production cost, and improved crystallization yield. rate effect
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Embodiment 1
[0039] Curcumin crystallization method provided by the present embodiment comprises the following steps:
[0040] (1) 1000g of turmeric raw material is pulverized into particles with a particle size of 30 meshes, added 3L of acetone, extracted at 40°C for 60min, and filtered to obtain 3L of turmeric extract, whose curcumin content is 10g / L;
[0041] (2) Evaporate the turmeric extract at a temperature of 30°C, a pressure of -0.06MPa, and a stirring speed of 0r / min, and control the time at 180min to obtain 250ml of the first turmeric concentrate, with a total solid content of 40%;
[0042] (3) Add isopropanol with 50ml / h to the first turmeric concentrated solution, simultaneously at temperature 30 ℃, pressure-0.05MPa, continue to evaporate to remove solvent under the condition of stirring speed 10r / min, this moment evaporation rate is 80ml / h , the time is controlled at 150min to obtain the second turmeric concentrated solution 175ml, and its total solid content is 60%;
[0043]...
Embodiment 2
[0046] Curcumin crystallization method provided by the present embodiment comprises the following steps:
[0047] (1) 1000g of turmeric raw material is pulverized into particles with a particle size of 35 meshes, added with 30L of ethanol, extracted at 50°C for 30min, and filtered to obtain 30L of turmeric extract, whose curcumin content is 1.5g / L;
[0048](2) The turmeric extract was evaporated at a temperature of 80°C, a pressure of -0.08MPa, and a stirring speed of 100r / min, and the time was controlled at 600min to obtain 660ml of the first turmeric concentrate, with a total solid content of 15.2%;
[0049] (3) Add n-butanol at 100ml / h to the first turmeric concentrate, and simultaneously at a temperature of 70°C, a pressure of -0.07MPa, and a stirring speed of 80r / min, continue to evaporate and remove the solvent, and the evaporation rate is now 200ml / h , the time is controlled at 270min to obtain 210ml of the second turmeric concentrate, and its total solid content is 50%...
Embodiment 3
[0053] Curcumin crystallization method provided by the present embodiment comprises the following steps:
[0054] (1) 1000g of turmeric raw materials were crushed into particles with a particle size of 40 meshes, added 6L of ethyl acetate, extracted at 45°C for 30min, and filtered to obtain 6L of turmeric extract, whose curcumin content was 5g / L;
[0055] (2) The turmeric extract is evaporated at a temperature of 50°C, a pressure of -0.04MPa, and a stirring speed of 40r / min, and the time is controlled at 225min to obtain the first turmeric concentrate 400ml, with a total solid content of 25%;
[0056] (3) add normal hexane with 75ml / h in the first turmeric concentrated solution, simultaneously at 45 ℃ of temperature, pressure-0.04MPa, continue to evaporate to remove solvent under the condition of stirring speed 40r / min, this moment, evaporation rate is 200ml / h, Time is controlled at 120min, obtains the second turmeric concentrate 150ml, and its total solid content is 70%;
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Abstract
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