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Biological calcium carbonate chitin, preparation method thereof and application thereof

A bio-calcium carbonate and chitin technology, applied in grain processing and other directions, can solve problems such as unfriendliness and waste of the environment, and achieve the effects of easy industrialization, low cost, and reduction of environmental pollution and resource waste.

Inactive Publication Date: 2013-04-24
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of prior art 1: the prior art uses crab shells to remove calcium carbonate from crab shells through strong acid to obtain chitin, and chitin will be strengthened by inorganic phases during use, such as adding calcium carbonate, etc. , then it is extremely wasteful and unfriendly to the environment to extract calcium carbonate when chitin is obtained
The shortcoming of prior art 2: the application of calcium carbonate in the crab shell is to adopt hydrochloric acid to dissolve first, adopt sodium carbonate to precipitate again, this process has realized the separation of chitin and calcium carbonate, and calcium carbonate is commonly used in chitin as a strengthening inorganic phase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Superfine grinding and wet sieving of crab shells

[0033] Select 500g of crab shells and wash them with water, use an AO type desktop micro airflow pulverizer, feed speed 0.05g / s, air pressure 0.66mp, feed particle size 600 mesh, grind once, and grind the crab shell powder to reach a D50 of 4 microns ~30 microns, the crushed crab shell powder is dispersed in 2000ml of water, and passed through a 2000 mesh sieve to obtain uniform ultrafine crab shell powder with a particle size of less than 8 microns.

[0034] (2) Depigmentation and fatty acid removal

[0035] Put the sieved uniform ultrafine crab shell powder into 1000ml boiling water and boil for 2 hours, then centrifuge at 2000r / min for 5min, remove the upper liquid, repeat the above boiling and centrifuging operation 3 times, and obtain the ultrafine crab with the lower layer depigmented and fatty acid removed shell powder.

[0036] (3) Remove protein

[0037] Disperse the ultrafine crab shell powder obtained...

Embodiment 2

[0041] (1) Superfine grinding and wet sieving of crab shells

[0042] Select 250g of crab shells and wash them with water. Use an AO-type desktop micro-jet mill with a feed rate of 5g / s, air pressure of 2mp, feed particle size of 1000 mesh, and crush 3 times until the crab shell powder is crushed to a D50 of 4 microns to 30 Micron, the crushed crab shell powder is dispersed in 1000ml of water, and passed through a 2000 mesh sieve to obtain uniform ultra-fine crab shell powder with a particle size of less than 8 microns.

[0043] (2) Depigmentation and fatty acid removal

[0044]Put the sieved uniform ultrafine crab shell powder into 500ml boiling water and boil for 4 hours, then centrifuge at 5000r / min for 2min, remove the upper liquid, repeat the above boiling and centrifuging operation 5 times, and obtain the ultrafine crab with the lower layer depigmented and fatty acid removed shell powder.

[0045] (3) Remove protein

[0046] Disperse the ultrafine crab shell powder ob...

Embodiment 3

[0050] (1) Superfine grinding and wet sieving of crab shells

[0051] Select 50g of crab shells and wash them with water, use an AO-type desktop micro airflow pulverizer, feed speed 0.02g / s, air pressure 0.3mp, feed particle size 300 mesh, pulverize twice, and pulverize the crab shell powder to reach a D50 of 4 microns ~30 microns, the crushed crab shell powder is dispersed in 200ml of water, and passed through a 2000 mesh sieve to obtain uniform ultrafine crab shell powder with a particle size of less than 8 microns.

[0052] (2) Depigmentation and fatty acid removal

[0053] Put the sieved uniform ultrafine crab shell powder into 100ml boiling water and boil for 3 hours, then centrifuge at 1000r / min for 10min, remove the upper liquid, repeat the above boiling and centrifuging operation twice, and obtain the ultrafine crab with the lower layer depigmented and fatty acid removed shell powder.

[0054] (3) Remove protein

[0055] Disperse the ultrafine crab shell powder obta...

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Abstract

The invention discloses biological calcium carbonate chitin, a preparation method of the biological calcium carbonate chitin and application of biological calcium carbonate chitin, and belongs to the preparation and processing filed of organic polymer matter. Aiming at single development and utilization of extraction of chitin in crab carapaces in the prior art, the invention provides a preparation method of the biological calcium carbonate chitin in which a natural compound structure of calcium-carbonate-chitin in the crab carapaces is kept. The preparation method of the biological calcium carbonate chitin comprises preparing and obtaining even ultramicro crab carapace powder through superfine grinding of the crab carapaces and wet sieving, carrying out removal processing of pigment and fatty acid on the ultramicro crab carapace powder through a repeated boiling and centrifugation method, removing protein through repeated sodium hydroxide solution hydrolysis and high speed centrifugation at a certain temperature, and obtaining the biological calcium carbonate chitin without the pigment, the fatty acid and the protein. The biological calcium carbonate chitin which is prepared and obtained is used in commodity polymer materials and plays a part of strengthening, and can further be used as a calcium supplement agent, be used in bone tissue repair and be used as a calcium source for mouth rehabilitation materials.

Description

technical field [0001] The invention belongs to the field of preparation and processing of organic polymer substances, and in particular relates to biological calcium carbonate chitin and its preparation method and application. Background technique [0002] The main components in crab shells are calcium carbonate, chitin, protein, and a small amount of pigments, fatty acids, amino acids and other substances. The application of the existing technology to crab shells mainly includes the patent application of "a method for extracting chitin from crab shells" No.: 201110118674, Classification No.: C08B37 / 08; "Technology for Extracting Chitin from Shrimp and Crab Shells", Patent Application No.: 200910182733, Classification No.: C08B37 / 08; "Quick Hydrolysis Extraction of Chitin from Shrimp and Crab Shells method", patent application number: 200610019158, classification number: C08B37 / 08; A23K1 / 10. [0003] The existing technology is as follows: "Method for rapid hydrolysis and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K3/26B02C19/06
Inventor 周长忍张瑞杰李立华
Owner JINAN UNIVERSITY
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