Method for preparing mycotoxin adsorbent for efficient carbon silicon feed by taking rice hulls as raw materials

A technology of mycotoxins and adsorbents, which is applied in the field of preparing new high-efficiency carbon-silicon feed mycotoxin adsorbents, achieving the effects of abundant sources, obvious adsorption and retention effects, and broad prospects

Inactive Publication Date: 2012-08-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the preparation of high-efficiency carbon-silicon feed mycotoxin adsorbents from rice husks

Method used

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  • Method for preparing mycotoxin adsorbent for efficient carbon silicon feed by taking rice hulls as raw materials
  • Method for preparing mycotoxin adsorbent for efficient carbon silicon feed by taking rice hulls as raw materials
  • Method for preparing mycotoxin adsorbent for efficient carbon silicon feed by taking rice hulls as raw materials

Examples

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Embodiment 1

[0032] 1. Take 500g of rice husk and pass through a 60-mesh sieve, add 3L of deionized water, stir and wash with water for 20min after mixing, and separate by suction filtration. After repeating the steps of water washing and suction filtration for 3 times, use 3L of hydrochloric acid with a concentration of 0.05mol / L to pickle for 2h, then Then filter and wash with water until the washing liquid is neutral, then place the washed rice husks in an oven at 105°C to dry;

[0033] 2. Take 20g of washed and dried rice husks and put them into a crucible, and pre-carbonize them in a muffle furnace. The carbonization temperature is 250°C, and the carbonization time is 1h;

[0034] 3. Take 15g of the pre-carbonized sample, soak it in 100mL 5% KOH lye at room temperature for 12 hours, filter it with 80°C hot distilled water until the lotion is neutral, and dry it in an oven at 105°C for later use;

[0035] 4. Take 10 g of the sample that has been desiliconized with alkali, add 30% zinc ...

Embodiment 2

[0039] 1. Take 1000g of rice husk and pass through a 60-mesh sieve, add 5L of deionized water, stir and wash with water for 40min after mixing, and separate by suction filtration. After repeating the steps of water washing and suction filtration for 3 times, use 5L of hydrochloric acid with a concentration of 0.1mol / L to pickle for 2h, then Then filter and wash with water until the washing liquid is neutral, then place the washed rice husks in an oven at 105°C to dry;

[0040] 2. Take 20g of washed and dried rice husks and put them into a crucible, pre-carbonize in a muffle furnace, the carbonization temperature is 350°C, and the carbonization time is 2h;

[0041] 3. Take 15g of the pre-carbonized sample, soak it in 200mL 10% KOH lye at room temperature for 24 hours, filter it with 80°C hot distilled water until the lotion is neutral, and dry it in an oven at 105°C for later use;

[0042] 4. Take 10 g of the sample that has been desiliconized with alkali, add 50% zinc chloride...

Embodiment 3

[0046] 1. Take 750g of rice husk and pass through a 60-mesh sieve, add 4L of deionized water, stir and wash with water for 30min after mixing, and separate by suction filtration. After repeating the steps of water washing and suction filtration for 3 times, use 4L of hydrochloric acid with a concentration of 0.075mol / L to pickle for 2h, then Then filter and wash with water until the washing liquid is neutral, then place the washed rice husks in an oven at 105°C to dry;

[0047] 2. Put 20g of washed and dried rice husk into a crucible, and pre-carbonize in a muffle furnace. The carbonization temperature is 300°C, and the carbonization time is 1.5h;

[0048] 3. Take 15g of the pre-carbonized sample, soak it in 150mL 7.5% KOH lye at room temperature for 18 hours, filter it with 80°C hot distilled water until the lotion is neutral, and dry it in an oven at 105°C for later use;

[0049] 4. Take 10 g of the sample that has been desiliconized by alkali dissolution, add 40% zinc chlor...

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Abstract

The invention discloses a method for preparing mycotoxin adsorbent for an efficient carbon silicon feed by taking rice hulls as raw materials. The method comprises the following steps of: removing impurities from the rice hulls; pre-carbonizing the rice hulls; dissolving the pre-carbonized rice hulls in alkali liquor to remove silicon; activating and sintering the rice hulls and the like. According to the method, a porous carbon silicon composite material with different specific surface areas and total pore volumes is prepared from the rice hulls, which are abundant in source, low in cost and reproducible, serving as the raw materials, under the process conditions of the control of pre-carbonization, silicon removal by alkali dissolution, high-temperature active sintering and the like, so that the requirements of each industry on adsorbing materials are met. The mycotoxin adsorbent has obvious effects on the adsorption and reservation of aflatoxin B1, an adsorption rate is up to about 99 percent, and the adsorption stability is obvious, so the method has a bright prospect in the field of the processing of grain feeds.

Description

technical field [0001] The invention relates to a method for preparing a novel high-efficiency carbon-silicon feed mycotoxin adsorbent by using rice husks as raw materials. The product has a strong adsorption effect on aflatoxin B1 and belongs to the technical field of fine inorganic chemicals. Background technique [0002] According to statistics, the positive contamination rate of mycotoxins in bulk grains and feedstuffs in my country is as high as 90%, among which those that should be banned due to serious pollution amount to 15% to 25% of the total output, and the annual loss of grain stored by farmers alone in the country reaches 15 to 20 million tons ( worth 18-20 billion yuan), which is equivalent to the annual grain output of a major grain-producing province. Aflatoxin is one of the most toxic and widely distributed mycotoxins, and it poses the greatest threat to humans and animals. Common methods for removing mycotoxins include: chemical methods, biological methods,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30A23K1/14A23K1/16
CPCY02P60/87
Inventor 陈正行周蕴宇王韧王莉
Owner JIANGNAN UNIV
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