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Eucommia ulmoide gum fractionation column and method for continuously fractionating eucommia ulmoide gum

The technology of eucommia gum and grading column is applied in the field of eucommia gum production, which can solve the problems of increasing the amount of precipitant, and achieve the effect of reducing the amount of use and improving the separation efficiency.

Inactive Publication Date: 2015-04-29
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method used above achieves continuous operation, but the polymer is separated through the fractionating column at one time, and finally only a fraction with a higher molecular weight and a fraction with a lower molecular weight can be obtained. If the polymer fraction with high molecular weight or low molecular weight is required For further grading, it is necessary to classify the above fractions through a grading column, which increases the amount of precipitant, as well as equipment, site investment and operational difficulty.

Method used

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  • Eucommia ulmoide gum fractionation column and method for continuously fractionating eucommia ulmoide gum
  • Eucommia ulmoide gum fractionation column and method for continuously fractionating eucommia ulmoide gum
  • Eucommia ulmoide gum fractionation column and method for continuously fractionating eucommia ulmoide gum

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The extract of Eucommia ulmoides seeds produced in western Hunan was taken as raw material with benzene as the extraction solvent. The eucommia gum in the extract was directly classified.

[0017] The eucommia glue classification device has a column height of 2.0 meters and a diameter of 25cm. It is divided into four stages, each stage is about 50cm high. The temperature of the first stage is controlled at 10°C, the second stage is controlled at 0°C, and the third stage is controlled at -5°C. The temperature of the fourth stage is controlled at -15°C, and the temperature control error is within 2°C; start stirring, and the stirring rate is controlled at 50~60 rpm

[0018] Pump the Eucommia gum extract from the upper inlet (1) of the classification column, the flow rate is between 60-120 L / h, preferably between 60-80 L / h, and open the first-stage precipitant inlet (2) , pump methanol as a precipitant, and the flow rate is controlled at 30~60 L / h. The flow rate ratio of t...

Embodiment 2

[0023] The extract of Eucommia ulmoides leaves in western Hunan was used as raw material, and the eucommia gum in the extract was directly classified. The weight average molecular weight before classification was 73,000, the molecular weight distribution index was 5.5, and the solvent of the extract was benzene.

[0024] The eucommia glue classification device has a column height of 2.0 meters and a diameter of 25cm. It is divided into four stages, each stage is about 50cm high. The temperature of the first stage is controlled at 10°C, the second stage is controlled at 0°C, and the third stage is controlled at -5°C. The temperature of the fourth stage is controlled at -15°C, and the temperature control error is within 2°C; start stirring, and the stirring rate is controlled at 60~80 rpm

[0025] Pump the Eucommia gum extract from the upper inlet (1) of the classification column, the flow rate is between 60-120 L / h, preferably between 60-80 L / h, and open the first-stage precipit...

Embodiment 3

[0030] The bark extract of Eucommia ulmoides produced in western Hunan was used as a raw material, and the eucommia gum in the extract was directly classified. The weight average molecular weight before classification was 193000, and the molecular weight distribution index was 1.95. The extraction solvent is petroleum ether (boiling range 60~90°C).

[0031] The eucommia glue classification device has a column height of 2.0 meters and a diameter of 25cm. It is divided into four stages, each stage is about 50cm high. The temperature of the first stage is controlled at 10°C, the second stage is controlled at 0°C, and the third stage is controlled at -5°C. The temperature of the fourth stage is controlled at -15°C, and the temperature control error is within 2°C; the stirring is started, and the stirring rate is controlled at 90-100 rpm; the precipitating agent is ethanol.

[0032] Pump the Eucommia gum extract from the upper inlet (1) of the classification column, the flow rate i...

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Abstract

The invention relates to a eucommia ulmoide gum fractionation column and a method for continuously fractionating eucommia ulmoide gum. According to the method, four sections of fractionation columns are adopted, a precipitating agent can be added in each fractionation column at a certain speed, the solubility of a solvent is continuously changed, eucommia ulmoide gum passes through the fractionation columns at one time, fractions with multiple molecular weight ranges are simultaneously obtained; by combining temperature gradient generated among fractionations, the separation efficiency is increased, the usage amount of the precipitating agent is effectively decreased and the industrial-grade large-scale fractionation is achieved.

Description

technical field [0001] The invention belongs to the field of eucommia gum production, in particular to a eucommia gum grading column and a continuous grading method for eucommia gum. Background technique [0002] Eucommia ulmoides Olive (Eucommia ulmoides Olive) is a deciduous tree belonging to the genus Eucommia ulmoides. It is a rare and precious medicinal tree species unique to China. It is also an important glue source plant with the widest adaptability in the world. In addition to containing a large amount of medicinal ingredients, Eucommia also contains a large amount of Eucommia gum in leaves, bark, seeds and other tissues. Eucommia gum belongs to hard rubber. Through vulcanization modification or blending with other materials and further processing, Eucommia gum can develop a series of new functional materials and industrial materials, especially in rubber products and tire industries. Existing studies have shown that the tensile strength, modulus, Shore hardness, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C4/00C08C2/00
Inventor 陈上李克刚李佑稷
Owner JISHOU UNIVERSITY
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