摘要
用正文试验法，探索了磺化工艺的最佳条件，并以结晶工序的下水套用于磺化，使杀虫单收率和含量均有大幅度提高。
The optimal condition of sulfonating technique of insecticide“ Sha chong dan”was chosen based on the results of a set of orthogonal tests. Both recovery and contents of the insecticide can be greatly increased by using the select condition and employment of crystallizing liquor.
