Menthol extraction method
An extraction method, menthol technology, applied in chemical instruments and methods, separation/purification of hydroxyl compounds, bulk chemical production, etc., can solve the problems of poor quality, low product purity, low extraction rate, etc., to achieve easy precipitation, Good crushing effect and improved extraction rate
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Embodiment 1
[0025] (1) Raw material processing: take 500g of fresh and mature mint leaves, wash and dry them, put them into a mortar and grind them, add 50ml of grinding liquid in 5 times during the grinding process, and the grinding liquid includes cellulase with a mass fraction of 1wt%. And the talcum powder that mass fraction is 1wt%; After grinding, add decomposition solution 800ml in the mortar, and adjust solution pH to 6 with hydrochloric acid, decomposition solution includes the cellulase that mass fraction is 3wt%; Stir at room temperature 1min, then Ultrasonic oscillation at 40°C for 20 minutes, with an ultrasonic frequency of 40MHz, to obtain mint pulp;
[0026] (2) Concentration by filtration: filter mint pulp by vacuum filtration; after filtration, put the filtrate into a rotary evaporator and concentrate at 120°C to obtain concentrate A; put the filter residue into a Soxhlet extractor, leaching with 75% ethanol aqueous solution, after the leaching is completed, put the extra...
Embodiment 2
[0030] (1) Raw material processing: take 500g of fresh and mature mint leaves, wash and dry them, put them into a mortar and grind them, add 40ml of grinding liquid in 5 times during the grinding process, and the grinding liquid includes cellulase with a mass fraction of 2wt%. and talcum powder with a mass fraction of 0.5 wt %; after grinding, add 1000 ml of decomposition solution to the mortar, and adjust the pH of the solution to 5 with hydrochloric acid, the decomposition solution includes cellulase with a mass fraction of 2 wt %; stir at room temperature for 2 min, Then ultrasonically oscillate at 45°C for 15 minutes at an ultrasonic frequency of 50 MHz to obtain mint pulp;
[0031] (2) Concentration by filtration: filter mint pulp by vacuum filtration; after filtration, put the filtrate into a rotary evaporator and concentrate at 110°C to obtain concentrate A; put the filter residue into a Soxhlet extractor, and use volume fraction leaching with 80% ethanol aqueous soluti...
Embodiment 3
[0035] (1) Raw material processing: take 500g of fresh and mature mint leaves, wash and dry them, put them into a mortar and grind them, add 45ml of grinding liquid in 5 times during the grinding process, and the grinding liquid includes cellulase with a mass fraction of 2wt%. and talcum powder with a mass fraction of 1 wt%; after grinding, add 1000 ml of decomposition solution to the mortar, and adjust the pH of the solution to 5 with hydrochloric acid, the decomposition solution includes cellulase with a mass fraction of 3 wt%; stir at room temperature for 1 min, then Ultrasonic oscillation at 45°C for 20 minutes at an ultrasonic frequency of 50 MHz to obtain mint pulp;
[0036] (2) Concentration by filtration: filter mint pulp by vacuum filtration; after filtration, put the filtrate into a rotary evaporator and concentrate at 115°C to obtain concentrate A; put the filter residue into a Soxhlet extractor, and use volume fraction leaching with 80% ethanol aqueous solution, af...
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