Production process of high-purity abamectin fine powder

A technology of abamectin and production process, which is applied to the preparation of sugar derivatives, sugar derivatives, and sugar derivatives, etc., can solve the problems of high production cost, many times of recrystallization of refined powder, large consumption of ethanol, etc. Good social and economic benefits, improve product quality, and reduce solvent consumption

Active Publication Date: 2012-08-01
DAQING JEFENE BIO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using this process are: the number of times of recrystallization using fine powder is large, the consumption of ethanol is large, and the production cost is high

Method used

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  • Production process of high-purity abamectin fine powder
  • Production process of high-purity abamectin fine powder
  • Production process of high-purity abamectin fine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A, get 1000 kilograms of water content in 18% abamectin fermented liquid dry mycelium, add 4000 kilograms (4 tons) of sec-butyl acetate at every turn by mass ratio 1: 4 and carry out three extractions, merge three extractions Liquid (12000 kilograms) 12 tons of sec-butyl acetate extracts; This step replaces the technique that adopts ethanol solution to extract dry mycelia in the traditional process with sec-butyl acetate, and solvent consumption is few, extraction rate is high;

[0052] The comparative effect is shown in Table 1

[0053]

[0054] B. After heating and concentrating the extraction solution in step A to 3000 liters, add 750 liters of 0.3% tetrabutylammonium bromide aqueous solution for 1 washing and layering;

[0055] The specific comparison results are shown in Table 2. The operation steps are simplified to provide a guarantee for improving the yield. Tetrabutylammonium bromide can be washed once to remove more impurities;

[0056] Table 2

[0057] ...

Embodiment 2

[0067] A, get 1000 kilograms of water content in 18% abamectin fermented liquid dry mycelium, be by mass ratio: 1: 5, add 5 tons of sec-butyl acetate at every turn and carry out three extractions, merge three extractions (15000 kilograms) 15 tons of 2-butyl acetate extracts; This step replaces ethanol solution leaching dry mycelia solvent consumption in the traditional technique with 2-butyl acetate, and the leaching rate is high,

[0068] The comparative effect is shown in Table 4

[0069]

[0070] B. After heating and concentrating the extract in step A to 3000 liters, add 750 liters of 0.4% tetrabutylammonium bromide aqueous solution for 1 washing and layering; see Table 5 for specific comparative effects, and the operation steps are simplified to improve the yield Guarantee that more impurities can be removed by washing with tetrabutylammonium bromide once;

[0071] The results are shown in Table 5 below

[0072] table 5

[0073]

[0074] C. Distill out all the se...

Embodiment 3

[0081] A, get 1000 kilograms of water content in 18% abamectin fermented liquid dry mycelia, be by mass ratio: 1: 3 add 3000 kilograms of sec-butyl acetate (3 tons) at every turn and carry out three extractions, merge three times 9000 kg (9 tons) of sec-butyl acetate extract of the extract;

[0082] This step replaces the ethanol solution in the traditional process with sec-butyl acetate to extract the dry mycelium with less solvent consumption and high extraction rate.

[0083] The comparative effect is shown in Table 7

[0084]

[0085] B. After heating and concentrating the extraction solution in step A to 3000 liters, add 750 liters of 0.6% tetrabutylammonium bromide aqueous solution for 1 washing and layering;

[0086] The specific comparison results are shown in Table 8. The operation steps are simplified to provide a guarantee for improving the yield. Tetrabutylammonium bromide can be washed once with water to remove more impurities.

[0087] Table 8

[0088]

...

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Abstract

The invention relates to a production process of abamectin fine powder. The production process method comprises the steps: extracting fermentation liquid filter cake with sec-butyl acetate for three times; combining organic-ester-phase extracts, adding tetrabutyl ammonium bromide aqueous solution for washing, and filtering, concentrating filtrate, and cooling and crystallizing to obtain once crude product; and dissolving the once crude product with ethanol, filtering, naturally cooling to room temperature, adding water at a volume ratio of ethanol to water being (7 : 1)-(4 : 1) for dilution crystallization, washing and drying to obtain the abamectin fine powder product. By adopting the method, the abamectin crystal product with higher purity and yield can be obtained; and compared with the traditional methods, the method has the advantages that the crystallizing time is shorter, the repeated crystallizing frequency is reduced and the production cost is low, thereby being a low-cost and high-efficiency production process of the high-purity abamectin fine powder.

Description

technical field [0001] The invention relates to a production process of abamectin fine powder. Background technique [0002] Abamectin is a low-toxic, high-efficiency, high-selection, green, environmental-friendly, bio-sourced insecticide. It completely solves the problem of environmental pollution caused by traditional pesticides. Five", "Ninth Five-Year", "Tenth Five-Year" and "Eleventh Five-Year" key research projects. With the popularization and promotion of Abamectin and its downstream products in recent years, it has not only led to the vigorous development of my country's agriculture and animal husbandry, but also promoted the transformation of agricultural and animal husbandry production to a green and harmless direction. [0003] Abamectin, one of the most effective insecticides in the world, has an annual consumption of about 2,500 tons in China, making it a leading product among pesticides and insecticides. Abamectin products commonly used in pesticides mainly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/04C07H1/06
Inventor 徐继民刘明洋
Owner DAQING JEFENE BIO CHEM
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