Preparation method of propanil
By using a condensation reaction method using a titanate catalyst, the problems of high cost and low efficiency in the preparation of titanium barn were solved, and an efficient and low-cost preparation process was achieved, with a yield and purity of more than 99%, which was suitable for industrial production.
CN119080630APending Publication Date: 2024-12-06JINZHOU YIJIA TECH CO LTD +1
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Patent Information
- Application Number
- CN202411191537.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2024-12-06
AI Technical Summary
Technical Problem
The existing preparation methods of barnyard have problems such as high cost, low production efficiency, large amount of excess products and waste, resulting in high usage costs.
Method used
Titanate is used as a catalyst to remove the water generated by the reaction of 3,4-dichloroaniline and propionic acid under the action of the catalyst, and simplify the post-treatment process and avoid the generation of excess propionic acid and wastewater. .
Benefits of technology
It significantly reduces production costs, improves yield and product purity, and achieves efficient and low-cost preparation, suitable for industrial production.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the field of organic synthesis, and discloses a preparation method of propanil, the propanil has a structure shown in a formula (1), the method comprises the following steps: under the catalysis of titanate, directly carrying out condensation reaction on 3, 4-dichloroaniline and propionic acid as raw materials to obtain propanil (3, 4-dichlorophenyl propionamide), and carrying out condensation reaction on the propanil (3, 4-dichlorophenyl propionamide) to obtain the propanil (3, 4-dichlorophenyl propionamide). In the reaction process, water generated by the reaction is removed in an azeotropic manner. The catalyst used in the method is low in price and is commonly used in industrial production; as the catalyst is added, the reaction time is obviously shortened, and the production efficiency is improved; according to the method, redundant propionic acid cannot be generated; the synthesized propanil is high in purity and good in yield, and the yield and the product quality can reach 99% or above. # imgabs0 #
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