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丁基铵黑药自1969年研制成功,并投入生产已多年了。但占产量8～15％的中性油、黑药渣却没有得到很好的解决,致使中间产品二丁基二硫代磷酸含量偏低,黑药渣污染环境。1981年我们针对上述问题,对原生产工艺作了改进。在合成中间产品黑药酸时,添加微量吡啶作催化剂和留150升母液参与下一批反应,较好地解决了上述问题。
Butyl ammonium black drug developed successfully since 1969, and put into production for many years. However, the production of 8 to 15% of the neutral oil, black drug residue has not been well resolved, resulting in low levels of dibutyl dithiophosphoric acid intermediate, black dregs pollute the environment. In 1981, we aimed at the above problems and made improvements to the original production process. In the synthesis of black drug acid, adding a trace of pyridine as a catalyst and leaving 150 liters of mother liquor to participate in the next batch of reactions, a better solution to the above problems.