Method for extracting quebrachitol from natural rubber whey
A technology of quebrabark alcohol and natural rubber, applied in the field of extracting quebrabark alcohol from natural rubber whey, can solve the problems of wasting resources and polluting the environment, and achieves the effects of easy operation, high product purity, and increased added value
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Embodiment 1
[0019] Heat 2kg of gel-making wastewater to above 90°C, skim off the floating gum and flocs, concentrate to 425g, add 425g of ethanol after filtration, heat and boil and filter with suction, distill the filtrate under reduced pressure to recover ethanol to 430g, add 43g of activated carbon, After boiling for 5 minutes, filter, continue to concentrate to 72g, add 72g of ethyl acetate in a separatory funnel, mix thoroughly, repeat twice, keep the water phase, add 144g of ethanol, filter, keep the filtrate at 60°C for 20 minutes, cool to room temperature, put Crystallize in a refrigerator at 1°C, filter to obtain the crude product, dry at 80°C to obtain 1.36g of quinia cortex alcohol crystals; add the crystals to 20ml of ethanol solution with a concentration of 75%, heat to boil for 5min, filter, keep the filtrate at 50°C for 20 minutes, and cool to room temperature, crystallized at 1°C, filtered to obtain crystals, repeated 3 times, and dried to obtain 1.12 g of crystals. The com...
Embodiment 2
[0021] Heat 10kg of fresh latex to 80°C, keep it warm for 2 hours until it is completely solidified, squeeze out 2kg of whey, continue to heat the whey to above 90°C, skim off the floating gum, concentrate to 495g, add 990g of methanol after filtration, heat to boil Suction filtration, distill the filtrate under reduced pressure to recover methanol to 486g, add 48.6g of activated carbon, filter after boiling for 5min, continue to concentrate to 98g, add 49g of ether into the separatory funnel, mix well, repeat twice, keep the water phase, add 196g Methanol, filter, keep the filtrate at 60°C for 20 minutes, cool to room temperature, put it in a refrigerator at 1°C to crystallize, filter to obtain the crude product, and dry at 80°C to obtain 2.82g of quebranol crystals; add the crystals to 40ml of methanol with a concentration of 66.66% In the solution, heat and boil for 5 minutes, filter, keep the filtrate at 50°C for 20 minutes, cool to room temperature, crystallize at 1°C, fil...
Embodiment 3
[0023] Heat 2kg of rubber-making wastewater to above 90°C, skim off the floating gum, concentrate to 420g, add 840g of acetone after filtration, heat and boil, then suction filter, distill the filtrate under reduced pressure to recover acetone to 412g, add 41.2g of activated carbon, and boil for 5min After filtering, continue to concentrate to 69g, add 35g of ethyl acetate in a separatory funnel, mix thoroughly, repeat twice, keep the water phase, add 138g of ethanol, filter, keep the filtrate at 60°C for 20 minutes, cool to room temperature, and put it in 1°C Crystallize in the refrigerator, filter to obtain the crude product, dry at 80°C to obtain 1.66g of quinia cortisol crystals; add the crystals to 25ml of 75% ethanol solution, heat to boil for 5min, filter, keep the filtrate at 50°C for 20 minutes, and cool to room temperature , crystallized at 1°C, filtered to obtain crystals, repeated 3 times, and dried to obtain 1.43g of crystals. The comparison with the standard produ...
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