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Organic reaction catalyst based on shrimp and crab scraps and preparation method and applications thereof

An organic reaction and waste technology, applied in the field of food waste resource utilization, can solve the problems of natural resource waste, environmental pollution, urban living environment hazards, etc., and achieve easy access, good substrate universality, and low cost. Effect

Active Publication Date: 2018-12-07
广东道科特生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only causes a waste of natural resources, but also causes new environmental pollution, which brings serious harm to the urban living environment.

Method used

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  • Organic reaction catalyst based on shrimp and crab scraps and preparation method and applications thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the organocatalytic material based on shrimp and crab waste, the steps are as follows:

[0034] 1) Collect crayfish waste (shrimp shells, shrimp heads) from food stalls in the night market, after drying, use a pulverizer to pulverize, sieve, collect 40-60 mesh components, and set aside;

[0035] 2) Under normal temperature and pressure conditions (normal temperature and normal pressure in the present invention refers to 20°C, 1 standard atmospheric pressure), add 5.0g of crayfish waste powder to 50mL of 60% NaOH solution and react at 120°C for 3.0h, filter, and wash with water until After neutralization, 2.9 g of chitosan-based organocatalytic material loaded with calcium carbonate can be obtained after vacuum drying at 60° C. for 48 h.

[0036] Catalytic experiment, steps are as follows: get above-mentioned catalytic material 0.1g and join in the 5mL round-bottomed flask, add 5mmol benzaldehyde and 5mmol malononitrile at the same time, room te...

Embodiment 2

[0040] The preparation method of the organocatalytic material based on shrimp and crab waste, the steps are as follows:

[0041] 1) Collect the hairy crab waste from the aquatic product market, after drying, pulverize with a ball mill, sieve, collect 20-40 mesh components, and set aside;

[0042] 2) Under normal temperature and pressure conditions, add 5.0g of hairy crab waste powder to 50mL of 60% KOH solution, react at 100°C for 4.0h, filter, wash with water until neutral, and vacuum dry at 60°C for 48h, namely 3.2 g of chitosan-based organocatalytic material loaded with calcium carbonate can be obtained.

[0043] Catalytic experiment, the steps are as follows: Take 0.1g of the above catalytic material and add it to a 5mL round bottom flask, add 5mmol benzaldehyde and 5mmol malononitrile at the same time, carry out the catalytic reaction at room temperature without solvent, and use thin layer chromatography (TLC) to track the progress of the reaction After the reaction fini...

Embodiment 3

[0047] The preparation method of the organocatalytic material based on shrimp and crab waste, the steps are as follows:

[0048] 1) Collect prawn waste (shrimp shell, shrimp head) from the restaurant, after drying, use grinding and crushing, sieve, collect 40-60 mesh components, and set aside;

[0049] 2) Under normal temperature and pressure conditions, add 2.0g prawn waste powder into 50mL 60% NaOH solution, react at 100°C for 3.0h, filter, wash with water until neutral, and vacuum dry at 60°C for 48h, 1.3 g of the chitosan-based organocatalytic material loaded with calcium carbonate can be obtained.

[0050]Catalytic experiment, the steps are as follows: Take 0.1g of the above-mentioned catalytic material and add it to a 5mL round bottom flask, add 5mmol furfural and 5mmol malononitrile at the same time, carry out the catalytic reaction at room temperature without solvent, and use thin layer chromatography (TLC) to track the progress of the reaction; After the reaction is ...

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Abstract

The invention discloses an organic reaction catalyst based on shrimp and crab scraps and a preparation method and applications thereof. The catalyst is prepared from shells of shrimps and crabs. The preparation method comprises following steps: (1) drying shrimp and crab scraps, and then grinding shrimp and crab scraps to obtain shrimp and crab powder; (2) adding the shrimp and crab powder into astrong alkali solution, and heating the strong alkali solution to remove proteins and acetyl groups; and (3) after the strong alkali treatment, filtering the shrimp and crab powder, washing, and drying to obtain a chitosan based organic catalyst containing a calcium carbonate carrier. The provided organic catalyst has following advantages: (1) the raw material sources are wide, the cost is low, and the raw materials are easily available; (2) the prepared catalyst has the advantages of high catalytic activity, large specific surface area, easy recovery, and good substrate universality; and (3)the preparation method has the advantages of simple operation and easy industrialization.

Description

technical field [0001] The invention relates to an organic catalyst prepared by using biological waste, in particular to an organic reaction catalyst based on shrimp and crab waste, its preparation method and application. The chitosan-based organocatalytic material containing calcium carbonate carrier is prepared by using wastes such as shrimp and crab shells as raw materials through concentrated alkali solution treatment, deproteinization and deacetylation. It belongs to the field of resource utilization of food waste. Background technique [0002] my country is rich in edible shrimp and crab resources, especially crayfish and hairy crabs, which have become popular all over the country in recent years. At present, with the increase of social demand, more than 10,000 tons of shrimp shells, shrimp heads, crab shells, etc. are discarded every year during the eating and processing of shrimps and crabs. It not only causes a waste of natural resources, but also causes new envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C253/30C07D307/54C07C255/34C07C255/35
CPCB01J31/26B01J2231/4205C07C253/30C07D307/54C07C255/34C07C255/35
Inventor 马浩弥林晗潘海婷滕俊江樊梅林李凝
Owner 广东道科特生物科技有限公司
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