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Extraction technology of avermectin

A technology of abamectin and extraction process, applied in the direction of sugar derivatives, organic chemistry, etc., can solve the problems of unpleasant smell in production environment, bad working environment of employees, low filtration precision of plates and frames, etc. Reduced secondary and tertiary extraction processes, significant economic and social benefits

Inactive Publication Date: 2007-03-07
河北美邦工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Filtration in this way has the defects of long alcohol extraction and filtration time, long production cycle, low precision of plate and frame filtration, and low product purity; at the same time, the amount of ethanol used in the alcohol extraction liquid filtration process is relatively large, and its amount is mycelium 15 to 30 times of the weight, and because the plate and frame filtration is a non-airtight operation, the material is in contact with the atmosphere during the whole plate and frame filtration process, and the volatilization loss of ethanol is serious. The abamectin production plant with an annual design capacity of 100 tons has an annual volatilization loss of The amount of ethanol is as high as 2,000-3,000 tons, and the production environment is extremely smelly and noisy, and the working environment of the employees is harsh, causing serious harm to the health of the employees.

Method used

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  • Extraction technology of avermectin

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: as shown in Figure 1, after abamectin mycelia dry matter is put into extraction tank 1, add organic solvent ethanol with the weight ratio of 1: 5, continue to stir at normal temperature 20~25 ℃ for 3~ After 6 hours, the leachate is made, and then the leachate is filtered through a ceramic membrane filter system 2 with a pore size of 10 μm to 2 nm through a feed pump 3 under a pressure of 0.1 to 0.6 Mpa. The ceramic membrane in the filter membrane system 2 is made of Jiangsu Jiu Wu Hi-Tech Co., Ltd. or German ATECH Technology Development Co., Ltd. uses ceramic filter membranes with a pore size of 10 μm to 2 nm to filter. The filtrate that passes through the filter membrane is sent to the subsequent semi-finished product processing system, and part of the raffinate that does not pass through the filter membrane is returned to the extraction tank. 1. The other part of the raffinate passes through the circulation pump 4 and then passes through the ceramic membr...

Embodiment 2

[0022] Embodiment 2: the difference between this embodiment and embodiment 1 is that organic solvent ethanol is added in a weight ratio of 1: 10; The ratio of raffinate flow rate is 16:1; the inner filter membrane of membrane filtration system 2 adopts stainless steel membrane, and the stainless steel membrane can be stainless steel filter membrane with a pore size of 10 μm to 50 nm produced by Hebei Ruitong Meibang Engineering Co., Ltd. or Kaimembrane Filtration Technology Co., Ltd.

Embodiment 3

[0023] Embodiment 3: the difference between this embodiment and embodiment 1 is that organic solvent ethanol is added in a weight ratio of 1:7; The ratio of raffinate flow rate is 13:1; the inner filter membrane of the filter membrane system 2 adopts hollow fiber membrane, and the hollow fiber membrane can be used by Holland X-FLOW Company, Tianjin Polytechnic University Membrane Engineering Technology Co., Ltd. or Tianjin Tianfang Membrane Separation Project Co., Ltd. produces hollow fiber ultrafiltration membranes with a pore size of 10 μm to 2 nm.

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Abstract

The invention discloses an extracting technology of avermectin, which comprises the following steps: blending dried mycelium of avermectin and carbinol or alcohol with weight rate at 1: 5-1: 10 in the immersing tank; stirring under 20-25 deg.c for 3-6h; filtering the filtrate under 0.1-0.6Mpa through filter membrane system with aperture at 10um-2nm; transmitting filtrate to semiproduct manufacturing system; returning partial residual liquid to immersing tank; entering the other half filtrate in the filter membrane circulating system through circulating pump; draining the slag in the immersing tank after filtering.

Description

technical field [0001] The invention relates to the production field of biological pesticide products, in particular to an extraction process of abamectin. Background technique [0002] With the improvement of people's living standards and the call for green food, biopesticides are favored in the current pesticide market, and avermectin is the most popular biopesticide product with great development potential in the current biopesticide market. [0003] As a new type of biopesticide, abamectin has the following unique advantages: wide insecticidal spectrum, strong insecticidal activity against various insects, mites and animal parasites; Cross-resistance and long-lasting effect; easy to degrade in soil and water, no accumulation and persistent residue in organisms, no pollution to the environment, and no pollution. Therefore, Abamectin and its derivatives occupy an increasing share in the pesticide and veterinary drug market, and their development prospects are very optimis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/08
Inventor 金作宏王素霞高文杲张玉新张卫国
Owner 河北美邦工程科技股份有限公司
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