A high-value comprehensive utilization method of shrimp and crab shells based on catalytic oxidation of reducing sugar and its application

A technology of catalytic oxidation, shrimp and crab shells, applied in the direction of chemical instruments and methods, applications, oxidation preparation of carboxylic acid, etc., can solve the problems of high process operation requirements, simple process, difficult promotion, etc., to achieve broad application prospects, cheap and easy raw materials The effect of obtaining and operating conditions is convenient

Active Publication Date: 2021-09-17
汕尾市海洋产业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention reduces the amount of acid and alkali, it does not achieve zero discharge, resulting in waste of resources to a certain extent
CN107312109A discloses a method for extracting chitin from shrimp and crab shells with degradable ionic liquids. In the process, citric acid needs to be used for secondary decalcification to realize high-value utilization of biological calcium. However, in industrial production, a large amount of chitin needs to be used. Expensive degradable ionic liquids with high requirements for process operation and difficult promotion
CN109053930A discloses a process for preparing chitin and organic calcium fertilizer, which specifically involves the steps of organic acid decalcification, enzymatic deproteinization and inorganic acid decalcification. This invention creatively realizes the reuse of waste liquid and solves the problem of avoiding secondary Pollution and other issues, but the process uses organic acids and inorganic acids, the calcium waste liquid is not purified into pure calcium agents, but simply mixed into organic liquid fertilizers, reducing economic benefits
CN108456261A uses steam explosion technology to destroy the dense structure of shrimp and crab shells. In the process, organic acid decalcification and enzymatic deproteinization are required to effectively obtain organic acid calcium, chitin and protein liquid, and realize the purpose of comprehensive utilization of shrimp and crab shells , the process is simple but expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, the high-value comprehensive utilization method of shrimp and crab shells based on glucose catalytic oxidation:

[0041] (1) Wash the discarded vannamei shrimp shells first, dry them in the sun, grind them into powder, and pass through a 40-mesh sieve for later use;

[0042] (2) Preparation of deproteinized shrimp shells and organic solid fertilizer: mix 2 g of shrimp shell powder with 10 mL of potassium hydroxide solution with a mass concentration of 5%, and mix them at a material-liquid ratio of 1:5. After reacting for 24 hours, deproteinize the shrimp shell powder, filter after the reaction to obtain protein-containing filtrate and deproteinized shrimp shell powder; then sterilize the obtained protein-containing filtrate in an autoclave at 121°C After cooling for 15 minutes, add concentrated phosphoric acid (mass fraction 83-93%) to adjust the pH until neutral, then concentrate and dry (dry at 70°C) to obtain an organic solid fertilizer.

[0043] (3) P...

Embodiment 2

[0046] Embodiment 2, the high-value comprehensive utilization method of shrimp and crab shells based on glucose catalytic oxidation:

[0047] (1) Wash the discarded vannamei shrimp shells first, dry them in the sun, grind them into powder, and pass through a 40-mesh sieve for later use;

[0048] (2) Preparation of shrimp shell deproteinization and organic solid fertilizer: Mix 2 g of shrimp shell powder with 40 mL of 10% potassium hydroxide solution at a ratio of 1:20 to react at room temperature (25°C) for 24 hour, deproteinize the shrimp shell powder, filter after the reaction to obtain protein-containing filtrate and deproteinized shrimp shell powder; then the obtained protein-containing filtrate was sterilized at 121° C. in an autoclave for 15 minutes, After cooling, add concentrated phosphoric acid (mass fraction 83-93%) to adjust the pH value until neutral, then concentrate and dry (dry at 70°C) to obtain an organic solid fertilizer.

[0049] (3) Preparation of glucose ...

Embodiment 3

[0052] Embodiment 3, the high-value comprehensive utilization method of shrimp and crab shells based on glucose catalytic oxidation:

[0053] (1) Wash the discarded vannamei shrimp shells first, dry them in the sun, grind them into powder, and pass through a 40-mesh sieve for later use;

[0054] (2) Preparation of shrimp shell deproteinization and organic solid fertilizer: Mix 2 g of shrimp shell powder with 20 mL of potassium hydroxide solution with a mass concentration of 10% at a ratio of 1:10 to react at room temperature (25° C.) for 3 hour, the shrimp shell powder is deproteinized, and the reaction is cooled and filtered to obtain the protein-containing filtrate and the deproteinized shrimp shell powder; then the obtained protein-containing filtrate is sterilized at 121° C. in an autoclave for 15 minutes, After cooling, add concentrated phosphoric acid (mass fraction 83-93%) to adjust the pH value until neutral, then concentrate and dry (dry at 70°C) to obtain an organic ...

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Abstract

The invention discloses a high-value comprehensive utilization method of shrimp and crab shells based on the catalytic oxidation of reducing sugar and its application. The method comprises the following steps: (1) washing discarded shrimp and crab shells, drying, grinding into powder and sieving to obtain shrimp and crab shell powder; (2) mixing shrimp and crab shell powder with potassium hydroxide solution to remove protein treatment, filtration, to obtain protein-containing filtrate and deproteinized shrimp and crab shell powder; then add concentrated phosphoric acid to the filtrate to adjust the pH value to neutral after sterilizing, concentrate and dry to obtain organic solid fertilizer; (3) deproteinize The shrimp and crab shell powder after the protein is mixed with the reducing sugar solution, and then a catalyst and an oxidant are added to react, and filtered to obtain chitin and a filtrate containing calcium gluconate; then the filtrate is concentrated and recrystallized to obtain calcium gluconate. The method of the invention can effectively extract chitin from shrimp and crab shells, and simultaneously prepare by-products such as calcium gluconate and organic fertilizers, solve the problem of zero discharge of waste, and realize comprehensive utilization in all directions.

Description

technical field [0001] The invention belongs to the research field of high-value shrimp and crab shells, and in particular relates to a high-value comprehensive utilization method and application of shrimp and crab shells based on catalytic oxidation of reducing sugar. Background technique [0002] my country's vast sea area is rich in marine fishery resources. Fishery is an important part of my country's agriculture. Shrimp and crab products occupy an important position in fishery output. With the rapid development of aquaculture, a large amount of shrimp and crab shell waste is produced. If it is not utilized, it will cause some pollution to the ecological environment. Making full use of the shrimp and crab shell waste is conducive to the sustainable development of the ecological environment. [0003] In the whole country, shrimp and crab are rich in resources and are an important part of the economy. With the progress of society and economy, their demand is also increasin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08C07C51/41C07C51/43C07C59/105C05G1/00
CPCC05B17/00C07C51/31C07C51/412C07C51/43C08B37/0003C08B37/003C07C59/105C05C11/00
Inventor 黄献培梁志钦潘一峰黄鑫唐平
Owner 汕尾市海洋产业研究院
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