Process of preparing dicamba by 3, 6-dichlorosalicylic acid

A technology of dichlorosalicylic acid and dicamba, which is applied in the field of preparation technology of dicamba and the preparation technology of herbicide dicamba, can solve the problems of low utilization rate of equipment, reduced waste water volume, long saponification time, etc., and achieves the utilization of equipment. Increased efficiency, reduced waste water, and automated effects
CN105906503AInactive Publication Date: 2016-08-31SICHUAN FOURSTAR BIOTECH RANDD CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN FOURSTAR BIOTECH RANDD CORP
Publication Date
2016-08-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a process of preparing dicamba by 3, 6-dichlorosalicylic acid, and belongs to the technical field of herbicide dicamba preparation processes. The process includes the steps of methylation reaction, saponification, methanol recovery, acidizing reaction and the like. By means of saponification with specific process parameters, efficiency can be greatly improved, saponification time is shortened, wastewater quantity is remarkably reduced, and equipment utilization rate is increased.
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Description

technical field

[0001] The invention relates to a preparation process of dicamba, more specifically, the invention relates to a process for preparing dicamba by using 3,6-dichlorosalicylic acid, which belongs to the technical field of the preparation process of herbicide dicamba. Background technique

[0002] Dicamba is a benzoic acid herbicide, which has systemic conduction effect and has a significant control effect on annual and perennial broad-leaved weeds. Dicamba is used for post-emergence spraying, and the agent can be quickly absorbed by the leaves, stems and roots of weeds , conducts upward and downward through the phloem, and is mostly concentrated in the meristem and the part with vigorous metabolic activity, hindering the normal activity of plant hormones, thereby causing them to die. Poaceae plants can quickly metabolize and decompose the drug after absorbing it to make it ineffective, so they show strong drug resistance. It is relatively safe for grass crops s...

Claims

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