Peanut shell activated carbon for removing toxins in peanut oil and preparation method thereof

Abstract

The invention belongs to the technical field of activated carbon, and particularly relates to a peanut shell activated carbon for removing toxins in peanut oil and a preparation method thereof. The peanut shell activated carbon is prepared by carrying out pretreatment, extrusion molding, carbonization and activation on peanut shells. The preparation method comprises the following steps: pretreatment: carrying out hydrothermal treatment on the peanut shells, and pulverizing; extrusion molding: carrying out pressure molding with a granulator to obtain cylindrical granules of which the diameters are 4-8 mm and the lengths are 10-20 mm; heating, cooling in the absence of oxygen, crushing and screening to control the granule diameters at 1-3 mm; and introducing isothermal superheated vapor, storing in a sealed environment, and cooling to obtain the finished product. The activated carbon is prepared from the peanut shells which are accessible raw materials, thereby implementing utilization of waste peanut shells; and the obtained peanut shell activated carbon has the advantages of large specific area and small pore size, can simultaneously adsorb benzopyrene, aflatoxin and other harmful substances, and can prevent the peanut oil from oxidative rancidity.

Description

Technical field

[0001] The invention belongs to the technical field of activated carbon, and specifically relates to a peanut shell activated carbon for removing toxins in peanut oil and a preparation method thereof. Background technique

[0002] Peanut oil is the edible oil with the largest consumption and consumption by ordinary people in my country, but the safety of edible oil based on peanut oil is not optimistic. Peanut oil raw materials are susceptible to infection by Aspergillus flavus during storage and transportation. Peanut oil that has not been detoxified after processing often contains excessive aflatoxins (mainly aflatoxin B). 1 ), in the process of processing, high temperature is easy to produce benzopyrene, because vegetable oil contains multiple unsaturated double bonds, oxidative rancidity is likely to occur during storage and processing. Excessive levels of aflatoxin and benzopyrene are the most common and widespread in peanut oil pollution. Aflatoxin is a grou...

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