Device and method for removing pesticide residue from plant by supercritical carbon dioxide

A carbon dioxide and pesticide residue technology, applied in the production/processing of edible oil/fat, food science, edible oil/fat, etc., can solve the problems of difficult removal, achieve high removal efficiency, easy and automatic operation

Active Publication Date: 2013-04-03
福建仙芝楼生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patents only study the removal of pesticide residues in solid matter, for the use of supercritical CO 2 The method of removing pesticide residues in liquid substances such as oils, because th

Method used

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  • Device and method for removing pesticide residue from plant by supercritical carbon dioxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: In supercritical CO 2 In the extraction kettle 1, there is a 3 / 4-4 / 5 height stainless steel packing 10-1 Pall ring (conjugated ring, step ring or double saddle ring can also be used), take 5.00kg corn oil, which contains organic Chlorpyrifos phosphorus 0.198 ppm, put into the extraction kettle, the liquid level should be lower than or equal to the upper surface of packing 11, reserve 1 / 4-1 / 5 space in the upper part of the kettle, CO 2 From the carbon dioxide cylinder 6 through the control valve 75 into the carbon dioxide storage tank 5, after passing through the cooling heat exchanger 8, high-pressure pump 9, and heating heat exchanger 10, it becomes supercritical CO 2 , inject the extraction kettle 1 from the bottom of the extraction kettle 1, keep the pressure inside the extraction kettle 1 at 20MPa, 35°C, supercritical CO 2 After fully mixing with corn oil for 30 minutes, start supercritical extraction. The flow rate of carbon dioxide is 100L / hr, and extr...

Embodiment 2

[0022] Example 2: In supercritical CO 2 In the extraction kettle 1, there is a 3 / 4 height stainless steel filler 11 as a conjugate ring, take 5.00kg of rapeseed oil, which contains organic phosphorus triazophos 0.468ppm and dichlorvos (DDV) 1.0ppm, and add it to the extraction kettle, Inject supercritical carbon dioxide and mix thoroughly at 25MPa and 40°C for 20 minutes, then start supercritical extraction with a flow rate of carbon dioxide of 110L / hr. The pressure of the fractionation column is 10MPa. In the fractionation column, the temperature of the upper section is 52°C, the temperature of the lower section is 38°C, the separation tank is 6MPa, the temperature is 35°C, extraction and fractionation are carried out for 6.5hrs, and after removal of pesticide residues, rapeseed oil without pesticide residues is obtained 4.30 kg, the residues of organophosphorus triazophos and dichlorvos DDV detected by gas chromatography with flame photometric detector (GC-FPD) are lower th...

Embodiment 3

[0023] Example 3: In supercritical CO 2 In the extraction kettle 1, 4 / 5 height stainless steel packing 11 double saddle rings are housed, get 5.0kg peanut oil, contain endosulfan 0.075ppm, fenpropathrin 0.131ppm, cypermethrin 0.125ppm, fenvalerate 0.101ppm and Bifenthrin 0.130ppm A total of five pyrethroid pesticide residues were added to the extraction kettle, injected with supercritical carbon dioxide, mixed thoroughly at 30MPa and 40°C for 25min, and then began to perform supercritical extraction. The flow rate of carbon dioxide was 120L / hr. The pressure of the fractionation column is 12MPa, the temperature of the upper section is 55°C, the temperature of the lower section is 40°C, the separation tank is 6MPa, the temperature is 35°C, extraction and fractionation is carried out for 6 hours, and after removal of pesticide residues, 4.02kg of peanut oil without pesticide residues is obtained. Gas chromatography (GC-ECD) detects that the contents of the above five pesticide re...

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Abstract

The invention provides a device for removing pesticide residue from plant by supercritical carbon dioxide, and the device is characterized by comprising an extraction kettle, a fractionation column, a separation kettle, a purifier, a carbon dioxide storage pot, a steel carbon dioxide bottle, a plurality of control valves, a cooling heat exchanger, a high pressure pump, a heating heat exchanger, and a filler. An air outlet pipe at the upper part of the separation kettle is connected with the purifier which is connected with the carbon dioxide storage pot. A removal method comprises a combination technique of supercritical carbon dioxide extraction and supercritical carbon dioxide fractionation. The device can be used for purifying the recycled supercritical CO2 to overcome the ignorance about a trace of the pesticide residue carried by the supercritical CO2 in the recycling in the industry and reduce the pesticide residue in the oil to the largest extent. Compared with the prior art, the device provided by the invention has the characteristics that the removal efficiency is high, the solvent carbon dioxide is odorless, tasteless and free of pollution, the operation is simple and automatic, the low-temperature extraction and physical fractionation are likely to protect active elements in the oil from destruction, and the pesticide residue after the removal is less than the state-specified maximum pesticide residue content in edible vegetable oil.

Description

technical field [0001] The present invention relates to a kind of supercritical carbon dioxide (supercritical CO 2 ) method for removing pesticide residues in vegetable oil, which belongs to the technology of removing pesticide residues in vegetable oil. Background technique [0002] "Food is the paramount necessity of the people", everyone cannot do without vegetable oil for three meals. The most important components of commonly used vegetable oils are fatty acids, especially the various unsaturated fatty acids contained therein, such as linolenic acid, oleic acid, and linoleic acid. Unsaturated fatty acid is a kind of fatty acid that constitutes body fat and is an essential fatty acid for the human body. The human body can only absorb it from oil, but cannot synthesize it by itself. Once it is lacking, the human body will slow down and even lead to various diseases. [0003] Vegetable oils are extracted from various plant flowers and fruits, such as cottonseed oil, ...

Claims

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Application Information

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IPC IPC(8): A23D7/04A23D9/04
Inventor 李晔姚渭溪华正根王金亮黄样增朱忠敏
Owner 福建仙芝楼生物科技有限公司
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