高纯二甲基二硫醚制备工艺研究与开发

Developing the technology of preparing high purity dimethyl disulfide

阐述了以 Na2 S、硫磺 (S)与 (CH3) 2 SO4 为原料 ,制取高纯二甲基二硫醚 (DMDS)的工艺过程。通过试验优选出各步反应和单元操作的适宜工艺条件。由 Na2 S2 与 (CH3) 2 SO4 合成 DMDS的最优反应条件如下 :Na2 S2 与 (CH3) 2 SO4 的物质的量之比为 1 .2 ,反应温度为 5 0～ 5 5℃ ,反应时间为 2 .0～2 .5 h,(CH3) 2 SO4 的流量为 30～ 35 m L /min。 DMDS的总收率达 92 %以上 ,产品的质量分数超过99.7%。

The high purity dimethyl disulfide(DMDS) was prepared.The technological process of the reactions was described.The suitable technological conditions of the reactions and unit operations were established based on the experiment results. The optimum reaction conditions of synthetizing DMDS from Na 2S 2 and (CH 3) 2SO 4 are as follows: the molar ratio of Na 2S 2 to (CH 3) 2SO 4 is 1.2;the reaction temperature is controlled between 50～55 ℃;the reaction time is 2.0～2.5 h;the volumetric flow rate is 30～35 mL/min.The total yield of DMDS reached more than 92% and its purity is over 99.7%.