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A kind of oxidative degradation method of chitin

A technology of oxidative degradation and chitin, applied in the field of oxidative degradation of chitin, can solve the problems of complex catalyst preparation and unsuitability for large-scale degradation, and achieve the effects of complete degradation, maximized utilization rate, and high product selectivity

Active Publication Date: 2020-08-07
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction realizes the further degradation of chitin, but the preparation of the catalyst is relatively complicated, and it is not suitable for large-scale degradation

Method used

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  • A kind of oxidative degradation method of chitin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Prepare alkaline solution:

[0067] NaOH, H 2 O and ZnO were weighed in proportions of 3.5g, 46.2g, and 0.3g, respectively, and then 0.5g of chitin was weighed for later use.

[0068] Put the beaker (built-in magnet) containing NaOH in the magnetic stirrer, turn on the magnetic stirrer at the same time to stir, add ultrapure water, add ZnO after NaOH is completely dissolved, use NaOH to dissolve and release a large amount of heat to dissolve ZnO, and obtain a mixture .

[0069] (2) Stir and disperse the mixture, place it in a freezer for the first time to freeze into a smoothie shape, and stir evenly. The temperature for the first time freezing is -40° C., and the freezing time is 3 hours.

[0070] (3) The smoothie-like mixture is frozen for the second time, thawed, and stirred until the solution is clear and viscous to obtain the chitin solution. The freezing temperature for the second freezing is -40° C., and the freezing time is 3 hours.

[0071] (4) the chiti...

Embodiment 2

[0075] (1) Prepare alkaline solution:

[0076] NaOH, H 2 O and CuO were weighed in proportions of 3.5g, 46.2g, and 0.3g, respectively, and then 0.5g of chitin was weighed for later use.

[0077] Put the beaker (built-in magnet) filled with NaOH in a magnetic stirrer, turn on the magnetic stirrer at the same time to stir, add ultrapure water, add CuO after NaOH is completely dissolved, use NaOH to dissolve and release a large amount of heat to dissolve CuO, and obtain a mixture .

[0078] (2) Stir and disperse the mixture, place it in a freezer for the first time to freeze into a smoothie shape, and stir evenly. The temperature for the first time freezing is -40° C., and the freezing time is 3 hours.

[0079] (3) The smoothie-like mixture is frozen for the second time, thawed, and stirred until the solution is clear and viscous to obtain the chitin solution. The freezing temperature for the second freezing is -40° C., and the freezing time is 4 hours.

[0080] (4) the chitin...

Embodiment 3

[0084] (1) Prepare alkaline solution:

[0085] NaOH, H 2 O, Fe 2 o 3 Weigh 3.5g, 46.2g and 0.3g respectively, and then weigh 0.5g chitin for later use; the mass fraction of NaOH solution is 11%.

[0086] Put the beaker (built-in magnet) containing NaOH in the magnetic stirrer, turn on the magnetic stirrer at the same time to stir, add ultrapure water, and add Fe after the NaOH is completely dissolved. 2 o 3 , using NaOH to dissolve and release a large amount of thermally dissolved Fe 2 o 3 , to obtain a mixture.

[0087] (2) Stir and disperse the mixture, place it in a freezer for the first time to freeze into a smoothie shape, and stir evenly. The temperature for the first time freezing is -40° C., and the freezing time is 3 hours.

[0088] (3) The smoothie-like mixture is frozen for the second time, thawed, and stirred until the solution is clear and viscous to obtain the chitin solution. The freezing temperature for the second freezing is -40° C., and the freezing ti...

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Abstract

The invention discloses an oxydative degradation method for chitin. The oxydative degradation method comprises the following steps: adding chitin powder in an alkaline solution to obtain a mixture; stirring the mixture and dispersing the mixture, performing primary refrigeration on the mixture to an ice sand state, uniformly stirring the material, performing secondary refrigeration on the mixturein the ice sand state, unfreezing the mixture, and stirring the mixture until the solution is transparent and viscous to obtain the chitin solution. The oxydative degradation method has the advantagesof simple operation, complete reduction, safety, and environmental protection.

Description

technical field [0001] The invention relates to the technical field of biodegradation, in particular to an oxidative degradation method of chitin. Background technique [0002] Chitin ((C 8 h 13 o 5 N) n ), is a kind of natural macromolecule biological polysaccharide, which widely exists in the shells of crustaceans such as shrimps and crabs, the shells of insects and the cell walls of plants, and its quantity in nature is second only to cellulose. Chitin is another element to maintain human life after protein, fat and vitamins. Therefore, it is an important raw material for medicine, food, light industry, chemical industry, environmental protection, etc. [0003] Chitin has good biocompatibility and biodegradability, and is expected to be applied in many fields. The conversion of chitin into fuel and high value-added chemicals is of great significance for alleviating the energy crisis and solving environmental pollution problems. [0004] In the prior art, chitin is u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08
CPCC08B37/003
Inventor 王国珍李超金伟平龚贤哲李亮蔡礼彬
Owner WUHAN POLYTECHNIC UNIVERSITY