Raffinose extraction method
A raffinose and extraction technology, applied in chemical instruments and methods, oligosaccharides, sugar derivatives, etc., can solve the problem of inability to recover or utilize dephenolized raffinose protein, low raffinose solubility, and low raffinose yield and other problems, to achieve the effect of low cost, low equipment requirements and high purity
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Embodiment 1
[0044]Using 60% methanol with a pH of 7.5 to extract defatted cotton meal 7 times in countercurrent circulation to obtain a dephenolized solution, in which the raffinose content was 4.25%. Take 5L of the dephenolized solution and pass it through a nanofiltration membrane with a molecular weight cut-off of 1000Da to obtain the permeate. Use a 200L column to fill the solid phase extraction column with 150ml of neutral alumina filler, the upper column liquid is 2BV, and the flow rate is 1.0BV / h. After passing through the column, rinse with 2BV of 95% methanol, then elute with 1.5BV of deionized water to obtain an eluent, add 0.2% activated carbon to the eluent, adjust the pH value to 5-6, and heat to 50°C Stir for 30 min, and obtain a decolorized solution after filtration. Add 45% ethanol to the decolorizing solution, lower the temperature to 10°C to crystallize for 14 hours, filter to obtain raffinose crystals, wash the crystals with a small amount of 95% ethanol and dry at 80°C...
Embodiment 2
[0046] 50% ethanol solution with pH 8.0 was used to extract defatted cottonseed meal 7 times in a counter-current cycle to obtain a dephenolized liquid with a raffinose content of 4.92%. Take 5L of the dephenolized solution and pass it through a nanofiltration membrane with a molecular weight cut off of 700Da to obtain the permeate. Use a 200L column to fill the solid phase extraction column with 150ml of octadecyl bonded silica gel. The upper column liquid is 3.0BV, and the flow rate is 1.5BV / h. After passing through the column, use 2BV of 95% ethanol to rinse, and then use 1.5BV of deionized water to elute to obtain an eluent, which is decolorized with D001 resin to obtain a decolorized solution. Add 50% ethanol to the decolorizing solution, lower the temperature to 10°C to crystallize for 12 hours, filter to obtain raffinose crystals, wash the crystals with a small amount of 95% ethanol and dry at 80°C to obtain raffinose products, which are analyzed by HPLC, pentahydrate c...
Embodiment 3
[0048] 50% acetone solution with a pH of 9.0 was used to circulate and countercurrent extract the degreased cottonseed meal for 7 times to obtain a dephenolized liquid with a raffinose content of 4.69%. Take 5L of the dephenolized solution and pass it through a nanofiltration membrane with a molecular weight cut off of 700Da to obtain the permeate. Use a 200L column to fill 150ml of polystyrene benzene packing with the permeate liquid on the solid phase extraction column, the upper column liquid is 1.5BV, and the flow rate is 0.5BV / h. After passing through the column, use 3BV of 90% acetone to rinse, and then use 2BV of deionized water to elute to obtain an eluent, which is decolorized with D301 resin to obtain a decolorized solution. Add 60% ethanol to the decolorizing solution, lower the temperature to 4°C to crystallize for 10 hours, filter to obtain raffinose crystals, wash the crystals with a small amount of 95% ethanol and dry at 80°C to obtain raffinose products, which ...
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