Preparation method for rose absolute oil
A technology of rose purification and rose, applied in the direction of essential oils/spices, fat generation, etc., can solve the problems of turbid color, great loss of rose oil aroma, uneven heating, etc., and achieves low moisture and wax content, natural and pure fragrance. protective effect
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Embodiment 1
[0021] A preparation method of rose absolute, comprising the following steps:
[0022] (1) Extraction: extract fresh rose petals with a mixed solvent of n-hexane:dichloromethane volume ratio 1:1, fresh rose petals and non-polar organic solvent volume-to-mass ratio is 1:6, cyclic extraction 3 times, 4 hours for the first extraction, 2.5 hours each for the last two extractions, extraction temperature 40°C;
[0023] (2), concentrating under reduced pressure: merge three extracts, filter, the filtrate is concentrated under reduced pressure, vacuum degree-0.09Mpa, obtain rose extract;
[0024] (3), the rose extract is dissolved in absolute ethanol, the mass volume ratio of rose extract and absolute ethanol is 1:6, immersed at 20°C for 8 hours, and the insoluble raw wax is filtered off to obtain the rose dissolved filtrate, Continue to freeze at -10°C for 15 hours;
[0025] (4), the frozen rose dissolving filtrate is subjected to high-speed centrifugation, the rotating speed is 10...
Embodiment 2
[0029] A preparation method of rose absolute, comprising the following steps:
[0030] (1) Extraction: extract fresh rose petals with a mixed solvent of n-pentane:dichlorodifluoroethane with a volume ratio of 1:1, and the volume-to-mass ratio of fresh rose petals to non-polar organic solvents is 1:8 , 3 times of circulating extraction, 4 hours for the first extraction, 2.5 hours each for the last two extractions, extraction temperature 50°C;
[0031] (2), concentrating under reduced pressure: combine three extracts, filter, and the filtrate is concentrated under reduced pressure, vacuum degree-0.1Mpa, to obtain rose extract;
[0032] (3), the rose extract is dissolved in absolute ethanol, the mass volume ratio of rose extract and absolute ethanol is 1:8, immersed at 25°C for 8 hours, the insoluble raw wax is filtered off, and the rose dissolved filtrate is obtained. Continue to freeze at -15°C for 15 hours;
[0033] (4), the frozen rose dissolving filtrate is subjected to hi...
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