溶剂法精制促进剂MBT的工艺及应用

Solvent Refining Process and Application of Accelerator MBT

采用溶剂法对粗促进剂MBT进行精制,并研究精制促进剂MBT在促进剂CBS合成中的应用。结果表明:以二丙酮醇为溶剂精制粗促进剂MBT的最佳工艺条件为二丙酮醇∶粗促进剂MBT质量比3∶1,终点温度55℃,降温速度2.0℃·min^(-1),洗涤100 g粗促进剂MBT的溶剂用量40 mL,母液套用4次后需要进行蒸馏精制再进行套用;采用溶剂法精制促进剂MBT合成促进剂CBS的最佳工艺条件为环己胺∶促进剂MBT物质的量比2∶1,反应温度46~48℃。该溶剂法精制工艺无废水产生,且生产成本低,具有显著的经济效益和环保效益。

The crude accelerator MBT was refined by solvent method,and the application of the refined accelerator MBT in the synthesis of accelerator CBS was studied.The results showed that the optimal process conditions for refining crude accelerator MBT with diacetone alcohol as solvent were as follows:the mass ratio of diacetone alcohol to crude accelerator MBT was 3∶1,the terminal temperature was 55℃,the cooling rate was 2.0℃·min^(-1),the amount of solvent used for washing 100 g of crude accelerator MBT was 40 mL,and the mother solution needed to be distilled and refined after four times of reuse.The optimum process conditions for the synthesis of accelerator CBS from the refined accelerator MBT by the solvent method were as follows:the molar ratio of cyclohexylamine to accelerator MBT was 2∶1,and the reaction temperature was 46~48℃.The solvent refining process produced no wastewater and had low production costs,which had significant economic and environmental benefits.