β-水芹烯异构制备α-松油烯的研究OA北大核心CSTPCD
Preparation of α-Terpinene by Isomerization of β-Phellandrene
对β-水芹烯酸催化异构制备α-松油烯的工艺进行了研究,结果表明:三甲基溴硅烷(TMSBr)因酸性适中对β-水芹烯表现出良好催化效果,但其对α-蒎烯、β-蒎烯、3-蒈烯、苧烯和异松油烯等单萜烯催化效果不佳;助剂30%(质量分数)H2O2因其所含的水可使TMSBr转化为H+从而催化异构反应进行,并通过对H+的扩散作用减少副反应发生,此外H2O2自身酸性对反应起到辅助催化效应,这3方面特性极大提升了反应效率.β-水芹烯异构制备α-松油烯的较佳工艺条件为:β-水芹烯0.1 mol、TMSBr 0.002 mol、30%H2O20.1 mol、反应温度100℃、反应时间6 h,此条件下原料转化率为88.4%,产物选择性为94.0%.
Acid-catalyzed isomerization of β-phellandrene for the preparation of α-terpinene and relative reaction process were investigated.The results indicated that trimethylsilyl bromide(TMSBr)showed excellent catalytic activity on the isomerizationβ-phellandrene owing to its moderate acidity.However,its catalytic effects on other monoterpenes such as α-pinene,β-pinene,3-carene,limonene and terpinene were limited.The auxiliary agent of 30%(mass fraction)H2O2 greatly improved the reaction efficiency owing to its three characteristics including converting TMSBr to H+to catalyze the isomerization reaction due to the existence of water,dispersing H+to reduce the occurrence of side reactions,and assisting the reaction by its own acidity.The optimal conditions for the preparation of α-terpinene from the isomerization of β-phellandrene were β-phellandrene of 0.1 mol,TMSBr of 0.002 mol,30%H2O2 of 0.1 mol,temperature of 100 ℃,time of 6 h,and the raw material conversion and product selectivity were 88.4%and 94.0%,respectively.
王婧;陈玉湘;赵振东;李海兵;冯盛
中国林业科学研究院林产化学工业研究所||江苏省生物质能源与材料重点实验室||国家林业和草原局林产化学工程重点实验室||林木生物质低碳高效利用国家工程研究中心||江苏省林业资源高效加工利用协同创新中心,江苏南京 210042普洱市思茅区森盛林化有限责任公司,云南普洱 665099
化学工程
β-水芹烯α-松油烯展松松节油催化异构三甲基溴硅烷
β-phellandreneα-terpineneturpentine from Pinus patulacatalytic isomerizationtrimethylsilyl bromide
《林产化学与工业》 2024 (004)
45-50 / 6
中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2022MA003);江苏省生物质能源与材料重点实验室项目(JSBEM-S-202205)
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