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

Inactive Publication Date: 2012-06-27
YUNNAN INST OF TROPICAL CROPS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Natural rubber fresh latex contains 1.0% to 1.9% of quebranol which can be developed and utilized, which is the single component with the largest content in non-glue substances. my country is the fifth largest producer of natural rubber, and produces a large amount of rubber-making wastewater every year. , whey discharged as wastewater not only pollutes the environment, but also wastes resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a method for extracting quebrachitol from natural rubber whey. The method comprises the following steps: 1, boiling the whey, removing floated rubber, concentrating, removing proteins and other impurities, decoloring by active carbon, and crystallizing. The method has the advantages of simple process, low cost of above used raw material, mitigation of the sewage processing pressure of a rubber preparation factory, realization of changing of wastes into valuables, and improvement of added values of the natural rubber industry.

Description

[0001] technical field [0002] The invention belongs to the technical field of separation and extraction of natural compounds, and in particular relates to a method for extracting Quaia cortisol from natural rubber whey. Background technique [0003] Quebrachitol is chemically called 2-methoxy-L-(-)-inositol (2-O-methyl-L-(-)chirinositol), which is a cyclic compound with medicinal optical activity. Carbohydrates of polyols, it has been confirmed that quebranol plays an important role in the metabolism of living organisms "transmitting information inside cells" and "controlling cell growth processes". As a chiral structural unit, quebranol can be simply transformed into a variety of inositol derivatives widely used in biology and medicine. Therefore, quebranol has attracted the attention of biochemical, pharmaceutical and medical experts. [0004] Foreign countries began to study extraction methods as early as the early 1930s. Judging from the method and product performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/196C07C41/34
Inventor 伍英姜士宽张桂梅徐荣郭刚军
Owner YUNNAN INST OF TROPICAL CROPS
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