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在碱性条件下,以空气为氧化剂氧化一异丙基萘(IPN)制备一异丙基萘过氧化物(IPNHP)。分别以NaOH和Na2CO3为催化剂、异丁醛和H2O2为引发剂,考察了催化剂种类和含量、引发剂种类、反应温度等因素对IPN转化率和IPNHP选择性的影响。实验结果表明,以Na2CO3为催化剂时IPN转化率较低,而以NaOH为催化剂时,IPN转化率明显增加,但反应速率较慢;加入引发剂可加快反应速率,但以H2O2为引发剂时,副产物较多,IPNHP选择性较差,而以异丁醛为引发剂时,IPNHP选择性大幅度提高。在反应温度100℃、异丁醛为引发剂(w=0.1%)、NaOH为催化剂(w(Na+)=1.5%)、氧气流量10 L/h时反应效果最好,IPN转化率最高达到26.5%,IPNHP选择性最高达到68.0%。
Under basic conditions, isopropylnaphthalene peroxide (IPNHP) was prepared by oxidation of monoisopropylnaphthalene (IPN) with air as oxidant. NaOH and Na2CO3 as catalysts, isobutyraldehyde and H2O2 as initiators, respectively. The effects of catalyst type and content, initiator type and reaction temperature on IPN conversion and IPNHP selectivity were investigated. The results showed that the conversion of IPN was lower when Na2CO3 was used as catalyst, and the conversion of IPN was obviously increased when NaOH was used as catalyst, but the reaction rate was slower. When H2O2 was used as initiator, More by-products, IPNHP selectivity is poor, but with isobutyraldehyde as initiator, IPNHP selectivity increased substantially. At the reaction temperature of 100 ℃, the isobutyraldehyde as the initiator (w = 0.1%) and NaOH as the catalyst (w (Na +) = 1.5%) had the best reaction and the IPN conversion reached 26.5 %, IPNHP selectivity up to 68.0%.