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Method for extracting eucommia ulmoides gum by treating eucommia ulmoides shells by sodium hydroxide/urea aqueous solution

A technology of urea aqueous solution and sodium hydroxide, which is applied in the field of extracting eucommia gum, can solve the problems of organic solvent toxicity, human body hazards, long fermentation time, etc., and achieve the effects of avoiding environmental pollution, realizing comprehensive utilization, and efficient extraction

Pending Publication Date: 2020-01-03
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of solvent method is that the purity of eucommia gum is high, but also has weak point: organic solvent is limited to the moistening effect of cell wall, and cell wall can hinder the leaching of eucommia gum, reduces the stripping of eucommia gum; the organic solvent that adopts has Toxicity, harmful to human body, poor safety, etc.
Although the microbial fermentation method or enzymatic hydrolysis method does not use toxic organic solvents, it also has the disadvantages of long fermentation time and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the treated fruit shell and add 4% sodium hydroxide and 2% urea aqueous solution according to the ratio of solid to liquid ratio of 1:10, the volume ratio of the two is 1:2, and treat at room temperature (22°C) for 1 hour. Filter, rinse the filter residue with water until neutral, dry in an oven at 50°C to constant weight, add petroleum ether at a solid-liquid ratio of 1:50, extract in a water bath at 85°C for 2 hours, and extract twice. Filtrate while it is hot, put the filtrate into the freezer of the refrigerator after cooling for 1 hour, filter the rubber filaments with a steel mesh, put the micelles in a vacuum drying oven, dry them, and weigh them to obtain white eucommia gum, with a yield of 37.7% eucommia gum.

Embodiment 2

[0021] Take the treated fruit shell and add 3% sodium hydroxide and 3% urea aqueous solution according to the ratio of solid to liquid ratio of 1:10, the volume ratio of the two is 1:1, and treat at room temperature (23°C) for 1 hour . Filter, rinse the filter residue with water until neutral, dry in an oven at 50°C to constant weight, add petroleum ether at a solid-liquid ratio of 1:50, extract in a water bath at 85°C for 2 hours, and extract twice. Filtrate while it is hot, put the filtrate into the freezer of the refrigerator after cooling for 1 hour, filter the rubber filaments with a steel mesh, put the micelles in a vacuum drying oven, dry them, and weigh them to obtain white eucommia gum, the yield of eucommia gum is 38.2%.

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Abstract

The invention provides a method for extracting eucommia ulmoides gum by treating eucommia ulmoides shells by a sodium hydroxide / urea aqueous solution and relates to a method for extracting the eucommia ulmoides gum. The method comprises the following steps: mechanically rolling and crushing the eucommia ulmoides shells, removing non-gum parts on the edges of the eucommia ulmoides shells, treatingthe plus sieve part by the sodium hydroxide / urea aqueous solution at room temperature to break cellulose, lignin, hemicellulose and the like in shell tissue cells to improve the permeability of the cell wall, and extracting the eucommia ulmoides gum from the treated raw material by petroleum ether. The minus sieve part, the filtrate treated by the sodium hydroxide / urea as well as the residues after eucommia ulmoides gum extraction can be used for treating crop straws to prepare eucommia ulmoides straw feed. By the method, the eucommia ulmoides gum in the eucommia ulmoides shells can be efficiently extracted, the process is simple and short time is consumed; the waste residues and the waste liquid generated in the sodium hydroxide / urea treatment and eucommia ulmoides gum extraction processes comprise some nutritional components in the eucommia ulmoides shells and are used for treating the crop straws to prepare the eucommia ulmoides straw feed, so the eucommia ulmoides resources are comprehensively utilized and environmental pollution is avoided.

Description

technical field [0001] The invention relates to a method for extracting eucommia gum, in particular to a method for extracting eucommia gum by treating eucommia husk with sodium hydroxide / urea aqueous solution. Background technique [0002] Eucommia ( Eucommia ulmoid c.s ) is a Eucommiaceae plant, which is a unique precious medicinal material and woody oil plant in my country. Eucommia is full of treasures, and its skin, flowers, fruits, leaves, etc. have high edible and medicinal value. At present, Eucommia ulmoides seed oil and Eucommia male flower have been approved by the state as new resource food raw materials, and Eucommia ulmoides leaves have also been approved to be included in the national "medicine and food homology catalogue". In addition, Eucommia can enhance the immunity of poultry and livestock and improve the flavor of meat, so as to realize antibiotic-free breeding. In 2013, the Ministry of Agriculture listed Eucommia in the "Catalogue of Feed Additives (2...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L7/00
CPCC08J3/00C08J2307/00
Inventor 刘桂萍方庆红许振川
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY