Whitening composition and preparation method thereof
A composition and whitening technology, applied in the field of daily chemical products, to achieve the effect of prolonging the shelf life, delaying aging, and being easy to store
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[0040] In a preferred embodiment, the preparation method of the extract A comprises the following steps:
[0041] Take 20g of dried and crushed mulberry root powder, add 200ml of 65-80wt% ethanol solution, 1-3g of penetrant and 15-30ml of ionic liquid, set the temperature at 70°C, extract with microwave at 480W for 45min, filter and discard Filter the residue, add acetic acid to the filtrate to adjust the pH value, evaporate and concentrate, centrifuge and precipitate, filter again, and dry the solid obtained by filtration to obtain extract A.
[0042] In the microwave extraction process in the present invention, the extraction temperature should be controlled at 70° C. and the power should be below 480 W. There are no special requirements for the rest of the operation methods, and it is enough to operate according to conventional procedures well known to those skilled in the art. For microwave extraction, an appropriate amount of acetic acid is added to the filtrate obtained ...
Embodiment 1
[0060] Example 1 provides a whitening composition, the whitening composition is composed of vitamin derivatives and mulberry root extract, including vitamin C derivative 8, nicotinamide 5, and mulberry root extract 6 in parts by weight.
[0061] The vitamin derivative is ascorbyl palmitate; the mulberry root extract is composed of extract A, extract B and extract C, wherein the weight ratio of the extract A, extract B and extract C is 1 :5:1.
[0062] The preparation method of described extract A comprises the steps:
[0063] Take 20g of dried and pulverized mulberry root powder, add 200ml of 65wt% ethanol solution, 1g of penetrant (tetrahydropiperine) and 15ml of ionic liquid, set the temperature at 70°C, and extract with microwave for 45min under 480W power, filter, and put in the filtrate Adding acetic acid to adjust the pH value, evaporating and concentrating, centrifuging and precipitating, and drying the solid obtained by filtration and separation to obtain extract A; ...
Embodiment 2
[0073] Example 2 provides a whitening composition, which consists of vitamin derivatives and mulberry root extracts, including 14 vitamin C derivatives, 10 nicotinamide, and 15 mulberry root extracts in parts by weight.
[0074] The vitamin derivative is ascorbyl palmitate; the mulberry root extract is composed of extract A, extract B and extract C, wherein the weight ratio of the extract A, extract B and extract C is 3.5 :5:2.
[0075] The preparation method of described extract A comprises the steps:
[0076] Get 20g of dried and pulverized mulberry root powder, add 200ml of 80wt% ethanol solution, 3g of penetrant (tetrahydropiperine) and 30ml of ionic liquid, set the temperature at 70°C, extract with microwave for 45min under 480W power, filter, and in the filtrate Adding acetic acid to adjust the pH value, evaporating and concentrating, centrifuging and precipitating, and drying the solid obtained by filtration and separation to obtain extract A;
[0077] The preparation...
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