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Process for extracting astaxanthin from prawn shells

An extraction process, astaxanthin technology, is applied in the field of astaxanthin extraction from shrimp shells, which can solve the problems of low astaxanthin extraction effect, difficulty in expanding production, and long time consumption, and achieve low cost, short extraction time, small effect

Inactive Publication Date: 2016-08-17
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods only use alkaline solution to extract astaxanthin, avoiding organic solvents, but the extraction effect of astaxanthin obtained is low
Wang Yin et al. extracted astaxanthin from shrimp shells by acid immersion decalcification pretreatment, ethanol solvent extraction and secondary extraction (Wang Yin, Hu Tingting, Wu Chengye. Determination and optimization of astaxanthin extraction process conditions in shrimp shells [J]. Fujian Agricultural Journal, 2013,28(10):1045-1049.), although the extraction effect obtained is better, but it takes a long time, and in the process of soaking and decalcifying shrimp shells with hydrochloric acid solution for many times Among them, the volatility and acidity of hydrochloric acid will also have a certain impact on the environment and the human body, and it will be difficult to expand production

Method used

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  • Process for extracting astaxanthin from prawn shells
  • Process for extracting astaxanthin from prawn shells
  • Process for extracting astaxanthin from prawn shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 1) Soak the shrimp shells in 1mol / L hydrochloric acid, place on a shaker and shake until no bubbles are generated, then filter off the hydrochloric acid, rinse the shrimp shells with distilled water until neutral, then dry them with a freeze dryer, and crush them into powder. Cross 100 mesh molecular sieves to obtain shrimp shell powder for subsequent use;

[0095] 2) Put 1g of shrimp shell powder in a flask, add 8mL of 90v / v% ethanol, stir well, and desorb for 25min; L of sodium hydroxide solution, extracted for 6 min, filtered, and the filter residue was repeated once for the above extraction operation, and the extract was collected (the extract was clear and transparent, bright in color);

[0096] 3) The obtained extract was extracted with dichloromethane, and the extract phase was collected and dried to obtain 0.145 g of astaxanthin. After calculation, the extraction rate is 14.5%.

Embodiment 2

[0098] 1) Soak the shrimp shells in 1.5mol / L hydrochloric acid, place on a shaker and shake until no bubbles are generated, then filter off the hydrochloric acid, rinse the shrimp shells with distilled water until neutral, then dry them with a freeze dryer and grind them into powder , through a 100-mesh molecular sieve to obtain shrimp shell powder, which is set aside;

[0099] 2) Put 1g of shrimp shell powder in a flask, add 16mL of 100v / v% ethanol, stir well, and desorb for 40min; then place the flask in a constant temperature tank at 70°C, and add 30mL of it, which is preheated to 70°C to a concentration of 0.5mol / L potassium hydroxide solution, extract for 8min, filter, and the filtrate is the extract (the extract is clear and transparent, bright in color);

[0100] 3) The obtained extract was extracted with dichloromethane, and the extract phase was collected and dried to obtain 0.150 g of astaxanthin. After calculation, the extraction rate is 15.0%.

Embodiment 3

[0102] 1) Soak the shrimp shells in 1.2mol / L hydrochloric acid, place on a shaker and shake until no bubbles are generated, then filter off the hydrochloric acid, rinse the shrimp shells with distilled water until neutral, then dry them with a freeze dryer and grind them into powder , through a 100-mesh molecular sieve to obtain shrimp shell powder, which is set aside;

[0103] 2) Put 1g of shrimp shell powder in a flask, add 10mL of 70v / v% ethanol, stir well, and desorb for 35min; then place the flask in a constant temperature bath at 72°C, and add 20mL of it, which is preheated to 72°C to a concentration of 1.5mol / L of calcium hydroxide solution, extract for 4min, filter, repeat the above-mentioned extraction operation twice for the filter residue, and collect the extract (the extract is clear and transparent, bright in color);

[0104] 3) The obtained extract was extracted with chloroform, and the extract phase was collected and dried to obtain 0.143 g of astaxanthin. Aft...

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Abstract

The invention discloses a process for extracting astaxanthin from prawn shells. The process specifically comprises the steps of soaking prawn shells in hydrochloric acid solution, taking the prawn shells out, washing the prawn shells with water to neutral, and conducting drying and smashing to obtain prawn shell powder; conducting desorption on the prawn shell powder with 70-100 v / v% ethyl alcohol serving as the desorption agent, then adding sig water for extraction at 70-80 DEG C, collecting extracting solution, conducting extraction with an organic solvent, and conducting drying to obtain astaxanthin. During desorption, the ratio of the volume mL of the desorption agent to the mass g of the prawn shell powder is larger than or equal to 8, and desorption time is longer than or equal to 25 min. Sodium hydroxide solution, potassium hydroxide solution or calcium hydroxide solution of 0.5-1.5 mol / L serves as the sig water, and the ratio of the usage amount mL of the sig water to the mass g of the prawn shell powder is larger than or equal to 20. Each time of extraction is longer than or equal to 4 min. According to the method, the prawn shells are treated with ethyl alcohol, consumption is low, cost is low, extraction time is short, extraction rate is high, and the extracting solution is transparent and low in impurity content.

Description

technical field [0001] The invention relates to the extraction of astaxanthin, in particular to an extraction process of astaxanthin in shrimp shells. Background technique [0002] Astaxanthin is a pink keto carotenoid among more than 600 kinds of carotenoids with the molecular formula C 40 h 52 o 4 , with a molecular weight of 596.86, belonging to terpene-like unsaturated compounds. In our country, shrimp resources are very rich. While fresh shrimp has become a delicacy on people’s dining table, it is also made into various shrimp non-staple foods. During this process, shrimp has been fully valued and utilized, accounting for about 30% to 40% of the shrimp heads and shells of the whole shrimp are usually not fully utilized, resulting in a great waste of resources. Shrimp shells contain a large amount of astaxanthin and astaxanthin esters. Astaxanthin is not only a potential natural pigment, but also has a strong antioxidant effect because of the conjugated double bond i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C403/24
CPCC07C403/24
Inventor 郑韵英刘子杰焦淑菲廖日权钟书明张瑞瑞梁兴唐尹艳镇
Owner QINZHOU UNIV
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