Grass lawn herbicide and its preparing method

A herbicide, undergraduate technology, applied in herbicides and algaecides, botanical equipment and methods, biocides, etc., can solve the problem of limited herbicidal effect, poor crabgrass effect, even so, Hangzhou Bureau of Garden Cultural Relics Huagang Questions about Lou Xiaoming and Wu Changxing of the Management Office

Inactive Publication Date: 2007-03-28
张伟兴
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fine (high) fenoxaprop-ethyl is used for lawn weeding, because of its poor safety performance and limited weeding effect, it has gradually faded out of the market
Some experts also recommend the use of paddy field herbicide dichloroquine phosphate to control grass weeds in grass lawns, but this agent is ineffective against the large number of goosegrass in the lawn, and the effect on crabgrass is poor, only

Method used

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Examples

Experimental program
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Embodiment Construction

[0005] The preparation method of the herbicide of the present invention has the following steps:

[0006] (1) Synthesis of a fluorine compound

[0007] Fenoxaprop-p-ethyl and active difluoro aromatic compound are fed according to a molar ratio of 2:1, 4-dimethylaminopyridine is used as a catalyst, dissolved at 65° C. and normal pressure, and then heated and pressurized while stirring. Stabilize at 320-330°C and 8-9 atmospheres and stir for 2.5 hours. After natural cooling, it will be centrifuged and dehydrated to obtain a fluorine compound;

[0008] (2) Synthesis of difluoro compounds

[0009] The monofluoro compound and the active bisfluoro aromatic compound are charged at a molar ratio of 3.5:1, and 4-dimethylaminopyridine is also used as a catalyst. The temperature is raised to 570-585℃, and the reaction is stirred at 19-20 atmospheres, about 5 The temperature began to drop after hours, and three isomers of the difluoro compound were obtained, namely α-difluoropropionic acid, β...

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Abstract

The present invention relates to a lawn weedicide and its preparation method. The composition of said lawn weedicide includes (by wt%) 1-50% of alpha-bifluoropropanoic acid, 1-20% of fenchlorazole, 5-10% of synergistic agent and the rest is adjuvant. Its preparation method includes the following steps: synthesizing monofluoride, synthesizing bifluoride, dissolving three kinds of isomer compounds in acetylacetone, separating to obtain alpha-bifluroropropanoic acid solution, mixing alpha-bifluoropropanoic acid, fenchlorazole, bromoxynil and adjuvant, stirring them uniformly so as to obtain the invented weedicide.

Description

Technical field: [0001] The invention relates to a herbicide, in particular to a grass lawn herbicide and a preparation method thereof. Background technique: [0002] At present, the lawn area in China is getting larger and larger, and the prevention and control of weeds in lawns has become the biggest problem for lawn managers. Most of them are manual weeding, which requires large investment, low efficiency and poor results. Weeds in the lawn can be divided into three categories: broad-leaved weeds, cyperaceae weeds, and gramineous weeds. In the field of domestic lawn chemical weeding, currently there are very few agents that can effectively control gramineous weeds on gramineous lawns. Since 1998, some experts have recommended the use of wheat field herbicide Jing (high) oxazoprop in grass lawns to control grass weeds such as crabgrass, goosegrass, and barnyard grass. Experiments have proved that the agent It only has good effect on grass weeds with less than 3 leaves, and is m...

Claims

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Application Information

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IPC IPC(8): A01N43/653A01P13/00A01N37/02
Inventor 张伟兴王运兵崔朴周王国昌秦雪峰刘彦国
Owner 张伟兴
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