Aflatoxin-adsorbing filter cloth, preparation method and application thereof

A technology of aflatoxin and filter cloth, which is applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of cumbersome operation, high oil viscosity, low reuse rate, etc., achieve good permeability and increase contact area and chance, combined with stable effects

Inactive Publication Date: 2018-04-06
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the current reports, the adsorbents for removing aflatoxin mainly include activated clay, diatomaceous earth, montmorillonite, etc., but due to the high viscosity of oil, it will cause a lot of loss during the production process, which cannot meet the needs of oil well. Production needs, more importantly, after taking these materials to absorb and remove, high-speed centrifugation is required to separate the oil from the materials, and the reuse rate is low, and the operation is more cumbersome

Method used

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  • Aflatoxin-adsorbing filter cloth, preparation method and application thereof
  • Aflatoxin-adsorbing filter cloth, preparation method and application thereof
  • Aflatoxin-adsorbing filter cloth, preparation method and application thereof

Examples

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Embodiment 1

[0032] (1) Preparation of filter cloth for absorbing aflatoxin

[0033] Pass 3.0g of flake graphite through a 325 mesh sieve and add it to 400mL of a mixed solution of sulfuric acid and phosphoric acid at a volume ratio of 9:1, and stir for 10 minutes; then slowly add 18.0g of potassium permanganate to the mixture (do not add too much each time , to avoid the reaction temperature exceeding 20°C). After the potassium permanganate was added, the mixture was heated to 50°C and stirred for 12 hours. After the reaction, let the mixture cool down to room temperature naturally, pour it into ~400mL of ice water, keep stirring at room temperature for 0.5h, and finally add 30wt% hydrogen peroxide dropwise to the reaction system until the solution turns bright yellow. Let it stand overnight, pour off the supernatant, wash 3 times with 1L hydrochloric acid with a mass fraction of 5% to 10%, and then wash 5 times with 1L deionized water to remove metal ions, sulfate ions and chloride ions...

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Abstract

The invention relates to aflatoxin-adsorbing filter cloth, and a preparation method and application thereof. The aflatoxin-adsorbing filter cloth disclosed by the present invention is a reduced graphene oxide / poly(vinyl formal) vinylon filter cloth composite material, has a regular structural morphology, and is obtained by a hydrothermal reduction of graphene oxide and food-grade poly(vinyl formal) vinylon filter cloth. The filter cloth can absorb a variety of aflatoxins, and is used for removing aflatoxins in edible vegetable oil, has good adsorption effect, can effectively reduce the pollution level of aflatoxins in edible vegetable oil, and can be reused with simple and convenient operation.

Description

technical field [0001] The invention belongs to the field of grain and oil quality safety, and in particular relates to a filter cloth for absorbing aflatoxin, a preparation method and its application in edible vegetable oil. Background technique [0002] Aflatoxins are a class of secondary metabolites produced by Aspergillus flavus, Aspergillus parasiticus and Penicillium. In 1993, aflatoxin was classified as a Class I carcinogen by the Cancer Research Institute of the World Health Organization (WHO), which is a highly toxic and highly toxic substance. Its toxicity is much higher than that of cyanide, arsenic and organic pesticides. where B 1 Most toxic. When people ingest a large amount, acute poisoning can occur, and acute hepatitis, hemorrhagic necrosis, hepatocyte steatosis and bile duct hyperplasia can occur; tissue proliferation. The carcinogenicity of aflatoxin also ranks first. It is one of the strongest known carcinogens at present. It has a destructive effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08C11B3/00C11B3/10D06M11/74B01J20/26B01J20/30
CPCB01D39/08B01D2239/0407B01J20/20B01J20/262C11B3/008C11B3/10D06M11/74D06M2101/24
Inventor 李培武毛劲张奇张良晓李慧张文喻理
Owner INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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