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Preparation method of chitosan produced from snow crab shell

A technology for chitosan and crab shells, which is applied in the field of preparing chitosan by using fresh snow crab shells, can solve the problems of serious damage to product molecular chains, failure to comprehensively utilize resources, and low product viscosity, and achieve stable product quality. , Breaking the drying process limitations and instability, as well as the control of cleanliness, the effect of high product viscosity

Active Publication Date: 2022-04-22
SHANDONG MEIJIA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this preparation method, energy consumption is high, and strong acid and strong alkali are used, which seriously damages the molecular chain of the product, the viscosity of the product is low, the resources are not comprehensively utilized, and the environmental pollution is serious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 200g of fresh snow crab shells, that is, fresh snow crabs just pass through the leftovers generated after the aquatic product processing in the previous process. After crushing, add 1000g of citric acid solution with a mass percentage concentration of 5%, soak for 15 hours, filter with gauze, and use tap water or Wash the crab shells with pure water to obtain a decalcified crab shell. The washing residue and the filtrate are combined to obtain a mixture. The mixture is filtered through a plate frame, and the filter residue is dried to obtain calcium citrate. The remaining mixture is collected for reuse after subsequent treatment. Add 1000g of 5% citric acid solution, repeat the above operation steps once to obtain decalcified crab shells; add 1000g of water to the decalcified crab shells, add 2g of flavor enzymes, keep warm at 49°C for 3 hours, after deactivating the enzymes, filter to obtain The filtrate was concentrated and spray-dried to obtain crab protein powde...

Embodiment 2

[0026] Take 200g of fresh snow crab shells, that is, the leftovers of fresh snow crabs that have just been processed by the aquatic products in the previous process. After crushing, add 600g of citric acid solution with a mass percentage concentration of 10%, soak for 6 hours, filter with gauze, and use tap water or Wash the crab shells with pure water to obtain a decalcified crab shell, combine the washing residue with the filtrate to obtain a mixture, filter the mixture through a plate frame, dry the filter residue to obtain calcium citrate, and collect the remaining mixture for reuse after subsequent processing; Add 400g of 10% citric acid solution, repeat the above steps until no bubbles are produced, indicating that the complete reaction has occurred, and the decalcified crab shells are obtained; add 400g of water to the decalcified crab shells, add 0.4g of flavor enzymes, and keep warm at 45°C 5 hours, after inactivating the enzyme, filter, the obtained filtrate is concen...

Embodiment 3

[0028]Take 200g of fresh snow crab shells, that is, the leftovers of fresh snow crabs that have just been processed by the aquatic products in the previous process. After crushing, add 700g of citric acid solution with a mass percentage concentration of 8%, soak for 10 hours, filter with gauze, and use tap water or Wash the crab shells with pure water to obtain a decalcified crab shell, combine the washing residue with the filtrate to obtain a mixture, filter the mixture through a plate frame, dry the filter residue to obtain calcium citrate, and collect the remaining mixture for reuse after subsequent processing; Add 700g of 8% citric acid solution, repeat the above steps until no bubbles are generated, which means complete reaction, to obtain decalcified crab shells; add 700g of water to the decalcified crab shells, add 1g of flavor enzyme, and keep warm at 55°C for 4 hours, after inactivating the enzyme, filter, the obtained filtrate is concentrated and spray-dried to obtain...

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Abstract

The invention discloses a method for preparing chitosan by using snow crab shells, relates to the technical field of preparation methods for high-viscosity polysaccharides, and in particular belongs to a method for preparing chitosan by using fresh snow crab shells. Crab shell pretreatment: take 200 parts ("parts" are in mass units, the same below) fresh snow crab shells and crush them; crab shell decalcification: add 600-1000 parts of citric acid solution with a mass percentage concentration of 5-10% to the crab shells , soaked for 6 to 15 hours, filtered, and water was used as a washing liquid to wash the filtered crab shells, and the washing residual liquid was combined with the filtrate to obtain a mixture for retention; extracting organic calcium: filtering the mixture through a plate frame, and drying the filter residue to obtain calcium citrate; The remaining mixed liquid is collected for reuse after subsequent treatment; the three wastes are eliminated in the entire production process, and zero waste, zero discharge, and high-value utilization are realized. Without high temperature and strong alkali deproteinization process, energy saving, environmental protection, and stable product quality. The product has high viscosity and good quality.

Description

technical field [0001] The invention relates to the technical field of preparation methods of high-viscosity polysaccharides, in particular to a method for preparing chitosan from fresh snow crab shells. Background technique [0002] Snow crab shells are wastes produced in the process of aquatic products processing. With the development of the aquatic products processing industry, the amount of these wastes is increasing. According to statistics, the annual output of snow crab shells in the world is about 600,000 tons. Making full use of these crab shells can form an industrial scale of more than 40 billion. At present, the utilization of snow crab shells is mainly processed into feed, only a small part is processed into chitin and chitosan, the processing technology is backward, the environmental pollution is serious, the quality of chitin and chitosan products is unstable, and some heavy metals in the products exceed the standard , the added value of the product is low, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08C12P21/06C07C59/265C07C51/41C07C51/42C07C51/47
CPCC08B37/003C08B37/0003C12P21/06C07C51/412C07C51/42C07C51/47C07C59/265
Inventor 郭晓华张永勤张廷翠董浩郑萌萌
Owner SHANDONG MEIJIA GROUP
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