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Method for extracting and purifying chlorophyll from silkworm excrement

A technology of chlorophyll and silkworm excrement, which is applied in the chemical field, can solve the problems of cumbersome solvent extraction process, inability to use, and affect quality, and achieve the effects of shortening filtration time, improving fluidity, and reducing viscosity

Inactive Publication Date: 2018-06-22
YUNNAN RAINBOW BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that in the existing method for extracting chlorophyll from silkworm excrement, the obtained impurities are relatively large and the purity is not high, which seriously affects its quality, and even cannot be used due to the high content of impurities, and the solvent extraction process used is cumbersome. A method for extracting and purifying chlorophyll from silkworm excrement is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In parts by weight, soak 100 parts of silkworm excrement into 30 parts of water for 30 minutes to obtain softened silkworm excrement;

[0034] Then put the softened silkworm excrement into the extraction tank, and then mix and stir the tetrahydrofuran solvent and the silkworm excrement evenly, wherein the weight ratio of the tetrahydrofuran solvent and the silkworm excrement is 6:1, and the stirring time is 30 minutes to obtain the extract;

[0035] Pass the extraction solution through a ceramic membrane to obtain a permeate. The ceramic membrane has a pore size of 0.05 μm, an operating temperature of 45°C, and a membrane exit pressure of 0.10 MPa. The permeate is recovered by top washing with an extraction solvent twice the volume of the retentate;

[0036] The permeate is introduced into the nanofiltration membrane for purification and concentration, and directional separation of chlorophyll. The operating temperature is 45°C, the membrane outlet pressure is 0.10Mpa, t...

Embodiment 2

[0041] In parts by weight, soak 100 parts of silkworm excrement into 30 parts of water for 60 minutes to obtain softened silkworm excrement;

[0042] Then put the softened silkworm excrement into the extraction tank, and then mix and stir the tetrahydrofuran solvent and the silkworm excrement evenly, wherein the weight ratio of the tetrahydrofuran solvent and the silkworm excrement is 6:1, and the stirring time is 60 minutes to obtain the extract;

[0043] Pass the extraction solution through a ceramic membrane to obtain a permeate. The ceramic membrane has a pore size of 0.05 μm, an operating temperature of 50°C, and a membrane outlet pressure of 0.15Mpa. Top wash with an extraction solvent that is 1.5 times the volume of the retentate, and recover the permeate;

[0044] The permeate is introduced into the nanofiltration membrane for purification and concentration, and directional separation of chlorophyll. The operating temperature is 50°C, the membrane exit pressure is 0.15M...

Embodiment 3

[0049] In parts by weight, soak 100 parts of silkworm excrement into 30 parts of water for 45 minutes to obtain softened silkworm excrement;

[0050] Then put the softened silkworm excrement into the extraction tank, and then mix and stir the tetrahydrofuran solvent and the silkworm excrement evenly, wherein the weight ratio of the tetrahydrofuran solvent and the silkworm excrement is 6:1, and the stirring time is 45 minutes to obtain the extract;

[0051] Pass the extraction solution through a ceramic membrane to obtain a permeate. The ceramic membrane has a pore size of 0.05 μm, an operating temperature of 48°C, and a membrane outlet pressure of 0.12Mpa. Top wash with an extraction solvent that is 1.0 times the volume of the retentate, and recover the permeate;

[0052] The permeate is introduced into the nanofiltration membrane for purification and concentration, and directional separation of chlorophyll. The operating temperature is 48°C, the membrane outlet pressure is 0.1...

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Abstract

The invention relates to the technical field of chemistry, and discloses a method for extracting and purifying chlorophyll from silkworm excrement. The technical scheme of the method comprises the following steps: soaking 100 parts by weight of the silkworm excrement in 30 parts by weight of water for 30-60 min to prepare softened silkworm excrement; putting the softened silkworm excrement into anextraction tank, mixing and stirring tetrahydrofuran with the silkworm excrement uniformly for 30-60 min to obtain an extraction solution; passing the extraction solution through a ceramic membrane to obtain a permeate; introducing the permeate into a nanofiltration membrane for purification and concentration, and directionally separating chlorophyll; performing vacuum compressing and drying on the purified chlorophyll to prepare a chlorophyll product. The problems that in the existing method for extracting chlorophyll from the silkworm excrement, the chlorophyll has high impurity content andlow purity, quality of the chlorophyll is seriously affected, even the chlorophyll cannot be used due to the high impurity content, and the solvent extraction process used is complicated are solved.

Description

technical field [0001] The invention relates to the technical field of chemistry, in particular to a method for extracting and purifying chlorophyll from silkworm excrement. Background technique [0002] A large amount of chlorophyll exists in the leaves of plants, and it is mainly extracted through plants relying on industrial means. Silkworm excrement is the excrement of silkworms. In addition to being popularized and used as traditional Chinese medicine, it also has other beneficial ingredients. [0003] Adopt solvent extraction commonly used in the prior art when silkworm excrement is processed, as alcohol, gasoline, sherwood oil, ether, acetone etc., because contain macromolecular substances such as a large amount of cellulose, hemicellulose, pectin, protein in silkworm excrement, On the one hand, the efficiency of solvent extraction is low and the amount used is large; at the same time, a large amount of insoluble matter (a large amount of cellulose, hemicellulose, pec...

Claims

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Application Information

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IPC IPC(8): C07D487/22
CPCC07D487/22
Inventor 周文婷代刚陈伟潘颉马艳芳苏雪娇
Owner YUNNAN RAINBOW BIO TECH
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