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2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc

一种噻唑锰锌、巯基苯的技术，应用在2-巯基苯并噻唑锰锌及其制备领域，能够解决2-巯基苯并噻唑锰储存不稳定、防制效果下降、限制使用时期等问题，达到优异防治效果的效果

Inactive Publication Date: 2013-03-20
HENAN XINXIANG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mancozeb is prone to phytotoxicity when used in the young flower and young fruit stage, which limits its use period
After many years of continuous large-scale use of mancozeb, its control effect has declined
[0003] 2-Mercaptobenzothiazole manganese has a good antibacterial effect, but due to the unstable storage of 2-mercaptobenzothiazole manganese, and the release of manganese ions too fast during the application process, which causes damage to crop leaves, it is difficult to actually used as a fungicide

Method used

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  • 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc
  • 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc
  • 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of 2-mercaptobenzothiazole manganese zinc:

[0023]

[0024] Dissolve 8.0 g (0.2 mol) of sodium hydroxide in 200 ml of distilled water, add 33.4 g (0.2 mol) of 2-mercaptobenzothiazole to the sodium hydroxide solution under stirring, and stir to fully dissolve it to obtain 2- Sodium mercaptobenzothiazide solution.

[0025] Add 11.38 g (0.066 mol) of manganese sulfate and 50 ml of water to the solution of sodium 2-mercaptobenzothiazole dropwise. The addition is completed within 20 to 30 minutes, and the temperature is controlled at 20 to 30°C. , Stir for 0.5~1 h.

[0026] Dissolve 9.88 g (0.034 mol) of zinc sulfate heptahydrate in 50 ml of distilled water to obtain an aqueous solution of zinc sulfate. Under stirring, add the aqueous solution of zinc sulfate dropwise to the above-mentioned sodium 2-mercaptobenzothiazole-manganese sulfate suspension. After adding, control the temperature at 20~25℃, continue to stir for 0.5~1 h, stand still for 1~2 h, filter and wash ...

Embodiment 2

[0035] Dissolve 4.0 g (0.1 mol) of sodium hydroxide in 200 ml of distilled water, add 16.7 g (0.1 mol) of 2-mercaptobenzothiazole to the sodium hydroxide solution under stirring, and stir to fully dissolve it to obtain 2- Sodium mercaptobenzothiazide solution.

[0036] Add 8.95 g (0.025 mol) of 50% liquid manganese nitrate and 50 ml of water to the aqueous solution of manganese nitrate dropwise in the sodium 2-mercaptobenzothiazole solution. The addition is completed within 20-30 minutes, and the temperature is controlled at 20~ Stir and react for 0.5~1 h at 30°C.

[0037] Dissolve 5.54 g (0.025 mol) of zinc acetate dihydrate in 50 ml of distilled water to obtain an aqueous solution of zinc acetate. Under stirring, add the aqueous solution of zinc acetate dropwise to the above-mentioned sodium 2-mercaptobenzothiazole-manganese nitrate suspension. When finished, control the temperature at 20~25℃, continue to stir for 0.5~1h, stand still for 1~2h, filter and wash twice to obtain a w...

Embodiment 3

[0054] Dissolve 4.0 g (0.1 mol) of sodium hydroxide in 100 ml of distilled water, add 16.7 g (0.1 mol) of 2-mercaptobenzothiazole to the sodium hydroxide solution under stirring, and stir to fully dissolve it to obtain 2- Sodium mercaptobenzothiazide solution.

[0055] Add 11.14 g (0.045 mol) of manganese acetate tetrahydrate and 50 ml of water to the solution of sodium 2-mercaptobenzothiazole dropwise. The addition is completed within 20~30 minutes, and the temperature is controlled at 20~ Stir and react for 0.5~1 h at 30°C.

[0056] Dissolve 1.45 g (0.005 mol) of zinc sulfate heptahydrate in 50 ml of distilled water to obtain an aqueous solution of zinc sulfate. Under stirring, add the aqueous solution of zinc sulfate dropwise to the above-mentioned sodium 2-mercaptobenzothiazole-manganese acetate suspension. After adding, control the temperature at 20~25℃, continue to stir for 0.5~1h, stand still for 1~2h, filter and wash twice to obtain a white precipitate, which is dried unde...

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PUM

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Abstract

The invention belongs to the technical field of agricultural fungicides and discloses 2-mercaptobenzothiazole manganese zinc as well as a preparation and an application of 2-mercaptobenzothiazole manganese zinc. The chemical structural formula of 2-mercaptobenzothiazole manganese zinc is as shown in the specification, wherein m, n and n' are positive integers, m=2(n+n'), n is not less than n', and n:n'=(1:1)-(9:1). The preparation method comprises the following steps: preparing materials according to the stoichiometric ratio of a target product; dissolving 2-mercaptobenzothiazole in a sodium hydroxide solution; sequentially adding a water solution of water-soluble manganese salt and a water solution of water-soluble zinc salt into a 2-mercaptobenzothiazole sodium solution, stirring, uniformly mixing, standing, filtering and washing with water to obtain a filter cake; performing vacuum drying on the filter cake to obtain 2-mercaptobenzothiazole manganese zinc. The 2-mercaptobenzothiazole manganese zinc disclosed by the invention can be used as the agricultural fungicide. According to the 2-mercaptobenzothiazole manganese zinc disclosed by the invention, zinc is complexed on a surface layer of a 2-mercaptobenzothiazole manganese solid to form a stable 2-mercaptobenzothiazole manganese and zinc complex. Tests show that the complex has excellent control effects on a variety of diseases, such as apple altermaria leaf spot, pear scab, apple ring rot, and apple anthracnose.

Description

technical field [0001] The invention belongs to the technical field of agricultural fungicides, and in particular relates to 2-mercaptobenzothiazole manganese zinc and its preparation method and application. Background technique [0002] Mancozeb (mancozeb) is a broad-spectrum, protective organosulfur fungicide, which is a coordination complex of maneb and zinc ions. It was developed by Rohm & Haas in 1961. Mancozeb has low toxicity and wide bactericidal spectrum. It can be used alone or mixed with many systemic fungicides. It not only expands the original bactericidal spectrum, but also complements systemic agents to improve drug efficacy and delay drug resistance. It is an excellent protective agent and has a wide application area at present, and is one of the important varieties of fungicides. However, mancozeb also has some shortcomings. Studies have found that mancozeb metabolites contain ethylene thiourea (ETU), which is carcinogenic and affects thyroid function at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/70A01N43/48A01P3/00
CPCC07D277/70C07D277/72A01N43/48A01N59/16A01N43/78Y02A50/30A01N2300/00
Inventor 王振军张栩王利敏刘红彦程森祥李梦娇
Owner HENAN XINXIANG ACADEMY OF AGRI SCI
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