Preparation method of peach blossom extracting solution and whitening composition containing peach blossom extracting solution
The technology of an extract and composition is applied in the field of preparation method of peach blossom extract and its whitening composition, which can solve the problems of cytotoxicity, inability to show whitening effect, use restriction, etc., achieve obvious whitening effect and reduce melanin production , low irritation effect
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Embodiment 1~3
[0041] Embodiment 1~3 relates to the extraction and refining process of peach blossom extract
Embodiment 1
[0043] The preparation method is as follows:
[0044] Process steps:
[0045] 1. Extraction: Soak peach blossom petals for 2 hours; 10 times water (w / w) external circulation equipment at 65°C for 3 hours, remove residues, and obtain crude extract;
[0046] 2. Flocculation: add 0.3% chitosan flocculant (that is, the addition of flocculant is 0.3% of the weight of the crude extract) in the crude extract, stir at 100 rpm at room temperature, and filter;
[0047] 3. Microfiltration: Membrane with a molecular weight cut-off of 30nm, operating pressure 3-6bar, temperature ≤ 65°C, microfiltration until about 30% of the reflux liquid remains, add the same amount of water and continue microfiltration until the amount of exudate is equal to initial extract volume;
[0048] 4. Ultrafiltration: Membrane with a molecular weight cut-off of 1500D, the operating pressure is 10-15bar, and the temperature is kept ≤65°C;
[0049] 5. Preparation: Dilute the ultrafiltered filtrate with 1,3-buta...
Embodiment 2
[0051] The preparation method is as follows:
[0052] Process steps:
[0053] 1. Extraction: Soak peach blossom petals for 2 hours; extract 10 times water (w / w) external circulation equipment at 45°C for 3 hours, remove residues, and obtain crude extract;
[0054] 2. Flocculation: add 0.1% chitosan flocculant (that is, the addition of flocculant is 0.1% of the crude extract weight) to the crude extract, stir at 100 rpm at room temperature, and filter;
[0055] 3. Microfiltration: Membrane with a molecular weight cut-off of 30nm, operating pressure 1-3bar, temperature ≤ 45°C, microfiltration until about 30% of the reflux liquid remains, add the same amount of water and continue microfiltration until the amount of exudate is equal to initial extract volume;
[0056] 4. Ultrafiltration: Membrane with a molecular weight cut-off of 1500D, the operating pressure is 5-10bar, and the temperature is kept ≤45°C;
[0057] 5. Preparation: Dilute the ultrafiltered filtrate with 1,3-buta...
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