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Method for extracting red pigment from crab shell of Portunus pelagicus

An extraction method and technology for red pigment, which are applied in the field of extraction of red pigment from flower crab shells, can solve the problems of high extraction difficulty, complex process, strict production conditions, etc., and achieve the improvement of extraction rate and purity, simple process, and improved quality. Effect

Inactive Publication Date: 2018-12-18
东山县吉兴水产加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the flower crab shell usually adopts the conventional pigment extraction process, which leads to complicated process, strict production conditions and high extraction difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The extraction method comprises the following steps:

[0021] S1: The fresh crab shells are then steamed with steam at 100°C for 5 minutes, the crab shells and crab meat are separated, and the residue inside the crab shells is further cleaned.

[0022] S2: The fresh flower crabs after the above cleaning are frozen by liquid nitrogen ultra-low temperature, and the fresh flower crab shells prepared by S1 are crushed by a low-temperature pulverizer in a frozen state with a liquid nitrogen pump infusion volume of 4 L / min. The low-temperature pulverizer The rotating speed is 15000 rev / min, and the time is 45 seconds, and the flower crab shell powder is obtained through a 100-mesh sieve;

[0023] S3: Take the flower crab shell powder prepared in S2, add dichloromethane, the ratio of flower crab shell powder to dichloromethane is 1:10-25, shake and mix, leaching in a water bath for 50 minutes, the leaching ends Afterwards, the red extract and the solid matter of the flower cr...

Embodiment 2

[0025] S1: The fresh crab shells are then steamed with steam at 100°C for 5 minutes, the crab shells and crab meat are separated, and the residue inside the crab shells is further cleaned;

[0026] S2: The fresh flower crabs after the above cleaning are frozen by liquid nitrogen ultra-low temperature, and the fresh flower crab shells prepared by S1 are crushed by a low-temperature pulverizer in a frozen state with a liquid nitrogen pump infusion volume of 4 L / min. The low-temperature pulverizer The rotating speed is 15000 rev / min, and the time is 45 seconds, and the flower crab shell powder is obtained through a 100-mesh sieve;

[0027] S3: Take the flower crab shell powder prepared in S2, add 25%-95% ethanol, the ratio of flower crab shell powder to 25%-95% ethanol is 1:10-25, shake and mix, and extract in a water bath After 50 minutes, the red extract and the solid matter of the flower crab shell were obtained after the extraction was completed, and the fixed matter of the f...

Embodiment 3

[0029] S1: The fresh crab shells are then steamed with steam at 100°C for 5 minutes, the crab shells and crab meat are separated, and the residue inside the crab shells is further cleaned;

[0030] S2: The fresh flower crabs after the above cleaning are frozen by liquid nitrogen ultra-low temperature, and the fresh flower crab shells prepared by S1 are crushed by a low-temperature pulverizer in a frozen state with a liquid nitrogen pump infusion volume of 4 L / min. The low-temperature pulverizer The rotating speed is 15000 rev / min, and the time is 45 seconds, and the flower crab shell powder is obtained through a 100-mesh sieve;

[0031] S3: Take the flower crab shell powder prepared in S2, add petroleum ether, the ratio of flower crab shell powder to petroleum ether is 1:10-25, shake and mix, extract in a water bath for 50 minutes, and obtain The red extract and the solid matter of the flower crab shell, the fixed matter of the flower crab shell is separated for the preparatio...

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Abstract

The invention discloses a method for extracting a red pigment from crab shell of Portunus pelagicus, and the method comprises the following steps: S1, steaming fresh Portunus pelagicus for 5 minutes by 100 DEG C steam, separating crab shell and crab meat, and further cleaning residues inside the crab shell; and S2, performing liquid nitrogen ultra-low temperature freezing on the cleaned fresh Portunus pelagicus shell, further crushing the fresh Portunus pelagicus shell in a low temperature pulverizer under liquid nitrogen ultra-low temperature frozen state, and sieving with a 100 mesh sieve toobtain Portunus pelagicus shell powder. The method uses ultra-low temperature and cold brittleness and deoxidization effect of liquid nitrogen to crush the Portunus pelagicus shell to improve the quality of the crushed Portunus pelagicus shell powder and the protein activity of waste, so that the waste can be easily applied in the field of fertilizers and realize non-toxic discharge; and the method is simple in process, facilitates subsequent processing by simple equipment, and is suitable for diversified production. By secondary extraction, other impurities can be removed well, and the extraction rate and purity of the red pigment can be improved.

Description

technical field [0001] The invention relates to the technical field of flower crab shell processing, in particular to a method for extracting red pigment from flower crab shells. Background technique [0002] The full name of the flower crab is the swimming crab of the open sea, which is widely distributed in the East my country Sea and South China Sea. A large number of crab shells produced during the processing of flower crabs are rich in astaxanthin, also known as astaxanthin, which is a carotenoid pigment. Studies have proved that this type of pigment has various biological activities such as anti-oxidation and anti-tumor. Under high-temperature heating conditions, astaxanthin turns into a bright red pigment. With the improvement of people's food safety awareness, the safety of color additives in food has been widely concerned. Applying the natural red pigment in flower crab shell to food can not only meet the color requirements of food, but also endow food with new ph...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
CPCC09B61/00C09B67/0096
Inventor 沈柳清尤彩艳沈全钦沈清松沈伟杰吴丽君
Owner 东山县吉兴水产加工有限公司
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