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A Study on the Optimal Preparation Condition of Fungicide Propineb  

Shin, Hee-Kwan (Department of Industrial Chemistry, Sangmyung University)
Woo, Je-Wan (Department of Industrial Chemistry, Sangmyung University)
Publication Information
The Korean Journal of Pesticide Science / v.8, no.4, 2004 , pp. 272-279 More about this Journal
Abstract
The process for the preparation of fungicide propineb starting with 1,2-diaminopropane was studied on the optimal condition base. Side reaction producing toxic material 1,2-propylenethiourea could be ieduced effectively by using phase transfer catalyst and the product was noticed to show a great improvement in yield and purity. Especially when the phase transfer catalyst tetraphenylphosphonium bromide is used, the yield and the purity of the product were found to be best with up to 95 and 96% respectively and the byproduct content was shown within 1.7%. Also, the contents of wetting agent AES and dispersing agent APS were optimally chosen $3.1\sim4.0%$ and $4.0%\sim5.0%$ respectively for the improvement of suspensibility and wettability of Propineb WP.
Keywords
Propineb WP; suspensibility; wettability; phase transfer catalyst; fungicide;
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