Method of extracting gutta percha by solvent circulation

A technology of solvent circulation and eucommia gum, applied in chemical instruments and methods, natural resin technology, etc., can solve the problems of high impurity content in colloids, unreusable solvents, etc., and achieves small volatilization loss, low pollution, and simple operation process. Effect

Inactive Publication Date: 2007-04-18
GUIZHOU UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for extracting eucommia gum using a single solvent circ

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  • Method of extracting gutta percha by solvent circulation
  • Method of extracting gutta percha by solvent circulation
  • Method of extracting gutta percha by solvent circulation

Examples

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Example Embodiment

[0027] Examples used commercially available Eucommia bark as a raw material, and petroleum ether with a boiling range temperature of 60-90°C as a solvent. The eucommia bark is ventilated and dried in an oven at about 50°C for 3 to 4 hours, crushed by a pulverizer, and passed through a 60-mesh sieve; add petroleum ether solvent at a ratio of 1:10 between the mass of the crushed dry material and the volume of the solvent. Reflux in a hot water bath at 85°C for 2h; filter with a stainless steel mesh of 100 mesh or more while it is hot, separate the slag, and collect the filtrate with gutta-percha gum dissolved in a triangular flask with a stopper; wait until the filtrate is cooled by water and is below- After refrigerating at a low temperature of 20°C for 1 hour, filter with a 100-mesh stainless steel mesh to recover the precipitated gutta-percha solid and the filtrate from which the gum is removed; the filtrate from which the gum is removed is mixed with the residue and refluxed for...

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Abstract

This invention provides a solvent circulate extraction of gutta percha, and the ligarine is used for extraction of gutta percha from folium eucommiae or skin eucommiae. Its craft includes: (1)The raw material is through circulation drying in baking oven, and then shatterred by crusher, cribration. (2)The ligarine is added in accordance with dosage liquor ratio, refluxing in hot bath water. (3)Filtering as hot as possible, segregating its dregs and collecting the filtrate. (4)The filtrate is filtered after water cooling and hypothermy cold storage to reclaim gutta percha solid and filtrate separately. (5)The filtrate degelatinized mixes again with dregs, and then refluxing. (6)Crude product is obtained by combining gutta percha after conducting repetitive operation twice. (7)The ligarine reclaimed still can be used for extraction of gutta percha.

Description

technical field [0001] The invention relates to a method for extracting natural resin, in particular to a method for extracting eucommia gum from the bark and leaves of the natural plant eucommia tree by using a solvent. Background technique [0002] Eucommia ulmoides Oliv (Eucommia ulmoides Oliv) is a rare and valuable economic tree species unique to China. Its leaves, bark and seeds are rich in white filamentous Eucommia ulmoides gum (Eucommia ulmoides gum, called gutta-percha or balata), which is the same as natural three leaf rubber. The isomers are trans-polyisoprene, while natural rubber is cis-polyisoprene with the following structure: [0003] [0004] trans-polyisoprene cis-polyisoprene [0005] Eucommia ulmoides is also one of the most widely used glue source plants in the world. Its peel, bark and leaves all contain eucommia gum. Eucommia gum has special functions such as "rubber-plastic dual characteristics" and shape memory. Eucommia gum exists in the g...

Claims

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Application Information

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IPC IPC(8): C09F1/00
Inventor 张学俊宋磊韩三发王庆辉
Owner GUIZHOU UNIV
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