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Monoformamidine hydrochlorate powder preparation and method for making same

A technology of monoformamidine hydrochloride powder and monoformamidine hydrochloride, which is applied in the field of pesticides and its preparation, can solve the problems of high packaging and transportation costs, low content of active ingredients, and inconvenient use by farmers, and reduce packaging costs. And transportation costs, simple operation, easy to control the effect

Inactive Publication Date: 2005-09-21
TIANJIN RENONG PESTICIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monoformamidine hydrochloride currently used in China is an aqueous formulation with a concentration of about 25%, because this aqueous formulation pesticide not only has low active ingredient content, but also requires high packaging and transportation costs.
In addition, it is very inconvenient for farmers to use
And do not see any monoformamidine hydrochloride powder on domestic and foreign markets at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 150 g of 25% monoformamidine hydrochloride aqueous solution, slowly add 20% sodium hydroxide solution until the pH value reaches 6.0, and continue stirring for 15 minutes. Add 30 g of sodium chloride at room temperature, and then lower the temperature to 5° C. while stirring. Stirring was continued at this temperature for 2 hours until monoformamidine hydrochloride crystallized. The above-mentioned crystals are filtered with filter paper, and dried at a temperature of 55° C. to prepare 39.2 g of monoformamidine hydrochloride powder of the present invention. The powder is light yellow to yellow-green powder, the content of monoformamidine hydrochloride is 88%, and the yield is 92%.

Embodiment 2

[0016] Take 150 g of 25% monoformamidine hydrochloride aqueous solution, slowly add 20% sodium hydroxide solution until the pH value reaches 6.0, and continue stirring for 15 minutes. Add 35 g of sodium sulfate at room temperature, and then lower the temperature to 5°C while stirring. Stirring was continued at this temperature for 2 hours until monoformamidine hydrochloride crystallized. The above-mentioned crystals are filtered with filter paper, and dried at a temperature of 65° C. to prepare 40 g of the monoformamidine hydrochloride powder of the present invention. The powder is light yellow to yellow-green powder, the content of monoformamidine hydrochloride is 86.7%, and the yield is 92.5%.

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PUM

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Abstract

The monoamitraz hydrochloride powder is prepared through neutralizing water solution of monoamitraz hydrochloride of 25 wt% concentration with alkali solution, adding inorganic salt of 15-25 % of the water of water solution of monoamitraz hydrochloride, stirring, cooling, filtering and drying. The monoamitraz hydrochloride powder is soluble, and has monoamitraz hydrochloride content as high as 85 %. Compared with monoamitraz hydrochloride aqua, the monoamitraz hydrochloride powder has greatly lowered packing and transportation cost, and may be used conveniently after adding water in field. In addition, the preparation process of the monoamitraz hydrochloride powder is simple in operation and easy in control.

Description

technical field [0001] The invention relates to a pesticide and a preparation method thereof, in particular to a monoformamidine hydrochloride powder and a preparation method thereof. Background technique [0002] Pesticides are a class of chemicals mainly used to control pests and regulate plant growth and development. Wherein monoformamidine hydrochloride is a new type of insecticide and acaricide widely used in domestic agriculture, and its chemical name is N-(2,4xylyl)-N-methylformamidine hydrochloride, which is An intermediate of amitraz. Because this kind of pesticide has the characteristics of good insecticidal and acaricidal activity, high efficiency, broad spectrum, and low toxicity, it is very popular among farmers. However, the monoformamidine hydrochloride currently used in China is an aqueous formulation with a concentration of about 25%, because this aqueous formulation pesticide not only has low active ingredient content, but also requires high packaging and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N37/52
Inventor 魏綦中杨志源郭宝德马骅
Owner TIANJIN RENONG PESTICIDE