2-甲基-6-叔丁基苯酚定向合成工艺优化及抗氧化性能  

Optimization of directional synthesis process and antioxidant properties for 2-tert-butyl-6-methylphenol

作　　者：孙畅 蒙冠霖 李珊珊 贾守亮 段百超 王俊[1] 李翠勤[1] SUN Chang;MENG Guanlin;LI Shanshan;JIA Shouliang;DUAN Baichao;WANG Jun;LI Cuiqin(Provincial Key Laboratory of Polyolefin New Materials,College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China;Heilongjiang Jiayi Grand Chemical Co.Ltd.,Anda 151400,China)

机构地区：[1]东北石油大学化学化工学院聚烯烃新材料省重点实验室,黑龙江大庆163318 [2]黑龙江佳宜宏大化工有限公司,黑龙江安达151400

出　　处：《化工科技》2024年第5期59-63,共5页Science & Technology in Chemical Industry

基　　金：黑龙江省支持重大科技成果转化项目(CG20A011)。

摘　　要：以邻甲酚和异丁烯为原料,采用自制的定向催化剂高选择性合成半受阻酚类抗氧剂中间体2-甲基-6-叔丁基苯酚。通过条件优化实验确定其最佳定向合成工艺为自制催化剂A为催化剂、m(催化剂A)∶m(邻甲酚)=0.25%、t=3 h、t=110℃、n(异丁烯)∶n(邻甲酚)=1.04;该条件下,2-甲基-6-叔丁基苯酚收率大于96.0%,选择性大于93.0%,纯度高于99.0%,熔程为25.0~28.0℃。IR和^(1)H NMR证实所合成目标产物2-甲基-6-叔丁基苯酚的化学结构与其理论结构相一致。以线性低密度聚乙烯(LLDPE)为研究对象,抗氧化性能测试结果表明2-甲基-6-叔丁基苯酚能较好地抑制LLDPE热氧化降解,且性能略优于全受阻酚类抗氧剂中间体2,6-二叔丁基苯酚。A semi-hindered phenolic antioxidant intermediate(2-tert-butyl-6-methylphenol)with high selectivity was synthesized using o-cresol and isobutylene as materials and the synthesized directional catalyst as catalyst.The optimal synthetic conditions were studied by conditional experiments and the optimal directional synthetic conditions were as follows:the synthesized directional catalyst A was catalyst,the mass ratio of catalyst A and o-cresol was 0.25%,the reaction time was 3 h,the reaction temperature was 110℃and the mole ratio of isobutylene and o-cresol was 1.04.Under the conditions,the yield of 2-tert-butyl-6-methylphenol(melting point 25.0~28.0℃)can be up to 96.0%,the selectivity was above 93.0%and the purity was above 99.0%.The structure was confirmed by IR and ^(1)H NMR.The antioxidant activity of 2-tert-butyl-6-methylphenol was evaluated for linear low-density polyethylene(LLDPE),and the results showed that 2-tert-butyl-6-methylphenol could well inhibit the oxidation of LLDPE during processing or thermal oxidation.The antioxidant activity of 2-tert-butyl-6-methylphenol was superior to 2,6-di-tert-butylphenol in LLDPE during processing or thermal oxidation.

关 键 词：2-甲基-6-叔丁基苯酚 定向合成 抗氧化性能 

分 类 号：O631.249[理学—高分子化学]