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Avermectin extraction technology and apparatus

A technology of abamectin and extraction method, which is applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problems of excessive leakage of plate and frame filter solvents, health hazards of employees, and heavy odors in the production environment. Achieve the effect of benefiting the health of employees, reducing solvent loss, and reducing material transfer steps

Active Publication Date: 2011-04-20
山东齐发药业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of using this method of extraction is that the production cycle is long, the plate and frame filter solvent leaks a lot, there are many safety hazards, and it is easy to cause pollution to the environment.
At the same time, during the leaching process, the amount of methanol or ethanol is large, which is 12-24 times the weight of the mycelium, and because the plate and frame filtration is a non-closed operation, during the plate and frame filtration, the material is in contact with the atmosphere, and the methanol or ethanol volatilizes Serious, and the production environment smells heavy, which is harmful to the health of employees

Method used

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  • Avermectin extraction technology and apparatus
  • Avermectin extraction technology and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1. A kind of special extraction column of Abamectin extraction technology

[0030] The structure of the extraction column is as follows figure 1 As shown, the extraction column is a closed tank container 1, and a stirrer 4 is arranged in the closed tank container 1. There are alcohol inlet 2 and nitrogen inlet 3 on the top of the airtight tank container, alcohol inlet 2 is used to add methanol or ethanol, there is a sieve plate 8 on the lower head of the container, a filter cloth 5 is laid on the sieve plate, and an extraction solution is provided at the bottom of the container Outlet 7 and steam inlet 6, alcohol gas outlet 9 is provided at the top of the container, and a condenser 10 is connected to the alcohol gas outlet. The condenser 10 is connected with an alcohol collection tank 11 for collecting recovered methanol or ethanol. The leach solution outlet is used to collect the leach solution, and the alcohol gas outlet and condenser are used to recover ...

Embodiment 2

[0031] Embodiment 2: Abamectin extraction

[0032] Put 2000 kilograms of dried abamectin mycelium into the extraction column, add 2M 3 Soak in methanol for 1-2 hours, then 1-1.5M per hour 3 The flow rate is to add methanol from the alcohol inlet 2 at the top of the column, and the effluent is collected at the bottom extraction liquid outlet 7 to enter the next step. When the output reaches 5-8M 3 When , collect the effluent in a set container. When the output reaches 15M 3 When, start to detect the abamectin content of the effluent at 120u / ml, 16M 3 Continue to detect the content at 90u / ml, stop feeding, use nitrogen to press out the methanol in the leaching column, and then pass steam from the steam inlet 6 at the bottom of the leaching column, and the methanol gas enters the external condenser from the alcohol vapor outlet 9 at the top 10 Collect methanol.

Embodiment 3

[0033] Embodiment 3: Abamectin extraction

[0034] Put 1500 kilograms of dried abamectin mycelia into the extraction column, add 3M 3 Soak in methanol for 1-2 hours, then 1-1.5M per hour 3 The flow rate is to add methanol from the alcohol inlet 2 at the top of the column, and the effluent is collected at the bottom extraction solution outlet 7 to enter the next step. When the output reaches 4-6M 3 When , collect the effluent in a set container. When the output reaches 10M 3 At the time, the avermectin content in the effluent was detected at 110u / ml, 12M 3 Continue to detect the content at 80u / ml, stop feeding, use nitrogen to press out the methanol in the leaching column, then pass steam from the bottom of the leaching column, and the methanol gas enters the external condenser from the top end alcohol vapor outlet 9 to collect methanol .

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Abstract

The invention relates to an extraction technique for avermectin and a device thereof. Mycelia of the avermectin after being dried is put into a leaching column and is soaked statically in alcohol for 1 hour to 2 hours firstly; then methanol or ethanol is continuously added from the top end of the leaching column for dynamic elution; leaching liquid is continuously collected from a liquid outlet at the lower part of the leaching column; when avermectin residues in the effluent liquid after elution is less than 100u / mg, the adding of alcohol is stopped; nitrogen is pumped from the top end of the leaching column to extrude all rest leaching liquid in the leaching column; steam enters from a sieve plate of the leaching column; by connecting a condenser with a gas collection opening at the upper part of the leaching column, the recycling and utilization of the methanol or the ethanol are carried out. The dynamic elution and a closed leaching and filtering system of the technique of the invention overcome the defects of a plate filtration production technique, can reduce the leakage and use amount of menstruum and can shorten production period and lower production cost.

Description

technical field [0001] The invention relates to the field of production of biological pesticide products, in particular to a process and device for extracting abamectin. Background technique [0002] With the improvement of people's living standards and the demand for pollution-free food, biopesticides are favored in the current pesticide market, and abamectin is the most popular and widely used biopesticide product in the current biopesticide market. [0003] As a new type of biopesticide, abamectin has the characteristics of high efficiency, low toxicity and broad spectrum, and has strong insecticidal activity against various insects, mites and animal parasites; The nerve conduction of vertebrates has a long-lasting effect; it is easy to degrade in soil and water, and will not pollute the environment. Therefore, it is a biological pesticide product with great development potential. [0004] In the current abamectin extraction process, the mycelia will be extracted with 4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H17/08C07H1/06A01P7/00
Inventor 刘书江刘世宽王德明
Owner 山东齐发药业有限公司
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