Huang Guo-qin
2012
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Journal
Fine chemicals
Abstract
This thesis presents a tri-phase transfer catalysis synthesis of sec-butyl disulfide using sec-butyl bromine,sulfur and sodium sulfide nonahydrate as raw materials,the self-made SiO2-g-PS load of quaternary ammonium salt as the tri-phase transfer catalyst.Via the orthogonal experiment,the optimum conditions were ascertained as follows:n(Na2S)∶ n(RBr)=1∶ 0.8,the dosage of catalyst 0.75%,reaction temperature 30 ℃,reaction time 9 h.The experiment was repeated for 3 times under such conditions,and the mean of yield was 57.65%.Compared with other tri-phase transfer catalysts,the catalyst used in this experiment has the best catalytic effect.What′s more,after 6 times′ reuse,the catalytic activity did not show any significant decline.The product was confirmed by 1HNMR and FTIR.