Extraction method of blue-green pigments of abalone shell

An extraction method and abalone shell technology are applied in the fields of natural pigment extraction and abalone shell waste utilization, can solve problems such as low utilization rate, medicinal use after grinding or direct disposal, etc., and achieve the effects of simple method, easy extraction and abundant resources.

Inactive Publication Date: 2012-08-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for extracting blue-green pigment from abalone shell; to solve the problem in the prior art that the processing of abalone shell is generally used as medicine after grinding or directly discarded, and the utilization rate is low. The extraction method of the present invention is simple and can produce It is a natural blue pigment additive. After the pigment is extracted, the remaining shells are intact and can continue to be used for other purposes.

Method used

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  • Extraction method of blue-green pigments of abalone shell

Examples

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Effect test

Embodiment 1

[0024] Take 500 grams of abalone shells, add 3 L of 3% acetic acid aqueous solution at 50°C, soak for 4 hours, and filter off the residue. The residue was soaked and extracted with 3L of 3% acetic acid aqueous solution repeatedly according to the above conditions, and the supernatants were combined twice to remove impurities by suction filtration. Adjust the pH of the filtrate to 9.5 with NaOH, let it stand for 0.5h, and remove the supernatant by suction; add 5% acetic acid aqueous solution to the precipitate, stir until the precipitate is completely dissolved, add an equal volume of ethyl acetate to extract twice, and take the blue The ethyl acetate layer was evaporated to remove the solvent, and then dried at 60°C-80°C to solid particles to obtain 7.5 mg of blue-green pigment solid powder.

Embodiment 2

[0026] Take 500 grams of abalone shells, add 3 L of 5% acetic acid aqueous solution at 40°C, soak for 8 hours, and filter off the residue. The residue was soaked and extracted with 3L of 3% acetic acid aqueous solution repeatedly according to the above conditions, and the supernatants were combined twice to remove impurities by suction filtration. Adjust the pH of the filtrate to 10 with NaOH, let it stand for 0.5h, and remove the supernatant by suction; add 15% acetic acid aqueous solution to the precipitate, stir until the precipitate is completely dissolved, add an equal volume of ethyl acetate to extract twice, and take the blue The ethyl acetate layer was evaporated to remove the solvent, and then dried at 60°C-80°C to solid particles to obtain 6.0 mg of blue-green pigment solid powder.

Embodiment 3

[0028] Take 500 grams of abalone shells, add 3 L of 8% acetic acid aqueous solution at 35°C, soak for 12 hours, and filter off the residue. The residue was soaked and extracted with 3L of 3% acetic acid aqueous solution repeatedly according to the above conditions, and the supernatants were combined twice to remove impurities by suction filtration. Adjust the pH of the filtrate to 11 with NaOH, let it stand for 1 hour, and remove the supernatant by suction; add 20% acetic acid aqueous solution to the precipitate, stir until the precipitate is completely dissolved, add an equal volume of ethyl acetate to extract 3 times, and take the blue acetic acid The ethyl ester layer was evaporated to remove the solvent, and then dried at 60°C-80°C to solid particles to obtain 8.5 mg of blue-green pigment solid powder.

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Abstract

The invention provides an extraction method of blue-green pigments of an abalone shell, belonging to the technical field of natural pigment extraction and abalone shell waste recycle and solving the problem that the prior art has low processing and utilizing rates of abalone shells. The extraction method comprises the following steps of: leaching the abalone shells in an acetic acid; filtrating to remove sediment; adjusting a pH value; filtering again to remove supernatant fluid; redissolving the sediment in the acetic acid; adjusting the pH value; leaching with ethyl acetate to obtain a bluepigment; and drying at 60-80 DEG C to form a solid particle pigment. The extraction method is simple, can prepare a natural blue pigment additive, and remains full shells for other purposes after pigment extraction. The abalone shells have rich resources, are easy to extract and have development potential.

Description

technical field [0001] The invention belongs to the technical field of natural pigment extraction and abalone shell waste utilization, and more particularly relates to a method for extracting blue-green pigment from abalone shell. Background technique [0002] With the development of medicine, sanitation and analytical testing technology, it has been found that synthetic pigments are harmful to human health. Many countries have stopped using some highly toxic varieties, and the allowed synthetic pigments are gradually decreasing, and their dosage has been strictly enforced. limit. In this context, the development of natural pigments has made great progress. They are mainly extracted from plants, and many varieties have physiological activities. Compared with synthetic colorants, natural pigments are safer. [0003] Abalone belongs to the phylum Mollusca, the class Gastropoda, the family Haliotidae, and the genus Haliotis. At present, the treatment of abalone shells is gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00
Inventor 张其清郭葳蔡志兴
Owner FUZHOU UNIV
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