Carbendazim preparation

A technology for carbendazim and preparations, applied in the field of carbendazim preparations, can solve the problems of high toxicity, low energy, loss of protective effect and the like

Inactive Publication Date: 2016-11-09
RUGAO GUANGHUA TECH ENTREPRENEUR SERVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Such products are mixed in the society, and some products are harmful to the human body and the environment. Therefore, the production management of the products must be strengthened. The low-energy, high-toxic external absorption fungicides of the products have lost their protective effect and are harmful to humans, animals, and fish. The toxicity is extremely high, and safety production and environmental protection must be given top priority to ensure the coordinated development of economic benefits, social benefits and environmental benefits. Therefore, a new technology is urgently needed to change

Method used

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Experimental program
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Embodiment Construction

[0008] specific implementation

[0009] A carbendazim preparation, including uniform stirring and filtering to remove impurities, is characterized in that: N-(2-benzimidazolyl)-methyl carbamate; EINECS number 234-232-0; molecular formula: C9H9N3O2; CAs number: 10605-21-7;. Molecular weight: 191.2; This product is an odorless powder, sublimates at 215-217°C, melts at 290°C, decomposes at 306°C, insoluble in water, slightly soluble in acetone, chloroform and others Organic solvent, its weight ratio is as follows: water--120KG, cyanamide (50.9%)--39.9KG, methyl chloroformate (99%)--52.6KG, NaOH (50%) solution--57KG

[0010] ,Put the above formula into a stainless steel container for ammoniation, condensation, solid-liquid separation, drying the finished product, and forming. After the solid-liquid separation, the mother liquor can be subjected to secondary precipitation, evaporation, centrifugation, and drying to extract the by-product (NaC1) 20.5 KG.

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Abstract

The invention provides a carbendazim preparation for systemic fungicides. The preparation is prepared from the following components: 120KG of water, 39.9KG of cyanamide having a concentration of 50.9 percent, 52.6KG of methyl chloroformate having a concentration of 99 percent and 57KG of NaOH solution having a concentration of 50 percent. The preparation method comprises the following steps: putting the materials into a stainless steel container, performing ammoniation, condensation, solid-liquid separation, finished product drying and molding, and simultaneously performing mother liquor secondary precipitation, evaporation, centrifugation and drying after solid-liquid separation to extract 20.5KG of a byproduct NaCl. Carbendazim is an efficient, broad-spectrum and safe systemic fungicide, can be used for preventing and controlling cercospora arachidicola, alternaria altemata and stem rot of peanuts, head scab of wheat, barley and naked barley, black spot of cereals, sclerotinia rot of colza, rice sheath blight disease, citrus canker, storage disease, cucurbits fusarium wilt, root and stem rot of flowers and the like.

Description

technical field [0001] The invention relates to a systemic bactericide with high efficiency and low toxicity, in particular to a carbendazim preparation. Background technique [0002] Such products are mixed in the society, and some products are harmful to the human body and the environment. Therefore, the production management of the products must be strengthened. The low-energy, high-toxic external absorption fungicides of the products have lost their protective effect and are harmful to humans, animals, and fish. The toxicity is extremely high, and safety production and environmental protection must be given top priority to ensure the coordinated development of economic benefits, social benefits and environmental benefits. Therefore, a new technology is urgently needed to change Contents of the invention [0003] The carbendazim preparation of the invention is a high-efficiency, low-toxic systemic bactericide, has systemic treatment and protection effects, and has low t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D235/32A01N47/18A01P1/00A01P3/00C01D3/04
CPCA01N47/18C01D3/04C07D235/32
Inventor 郝强
Owner RUGAO GUANGHUA TECH ENTREPRENEUR SERVICES CO LTD
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