光稳定剂HS-112合成工艺研究

Synthesis of Light Stabilizer HS-112

以癸二酸二(2,2,6,6-四甲基-四羟基哌啶)酯氮氧自由基(A)为原料,70%叔丁基过氧化氢(B)为氧化剂,正辛烷(C)为溶剂,三氧化钼(D)为催化剂,经一步反应合成光稳定剂HS-112,研究了物料的投料比、催化剂的用量、反应时间、反应温度对反应收率的影响。实验结果表明,光稳定剂HS-112的最佳合成工艺为:n(A)∶n(B)=1∶3,三氧化钼用量为物料A质量的1.8%,反应时间10h,反应温度125℃,正辛烷140 g(A为0.1 mol时);在上述条件下,光稳定剂HS-112的收率为87.26%。

Using bis(2,2,6,6-tetramethyl-1-piperidinyloxy-4-yl)sebacate as raw material,70%TBHP(B)as oxidant,1-octane(C)as the solvent,and molybdenum trioxide(D)as the catalyst,light stabilizer HS-112 was synthesized through one-step reaction.The effect of the feed ratio of the material,the amount of catalyst,reaction time and reaction temperature on the reaction yield was studied.The experimental results showed that the optimal synthesis process of the light stabilizer HS-112 was as follows:n(A)∶n(B)=1∶3,the amount of molybdenum trioxide was 1.8%of the mass of material A,the reaction time was 10 h,and the reaction temperature was 125℃,1-octane 140 was g(when A was 0.1 mol);Under above conditions,the yield was 87.26%.