松香中枞酸型树脂酸热作用变化规律的研究  

Study on thermal reactions of abietic-type acids in rosin

作　　者：陈玉湘[1,2] 赵振东[1] 古研[1] 郭长泰[1] 李冬梅[1] 毕良武[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,国家林业局林产化学工程重点开放性实验室,江苏南京210042 [2]株洲松本林化有限公司,湖南株洲412001

出　　处：《现代化工》2009年第2期46-49,共4页Modern Chemical Industry

基　　金：国家“十一五”科技支撑项目(2006BAD18B0504);国家自然科学基金(30571466)资助项目

摘　　要：研究了松香中枞酸型树脂酸在惰性气体保护下，于180～270℃进行高温热处理1～4h时的变化规律。结果表明，热作用时间低于3h、温度低于240℃时，以长叶松酸、枞酸、新枞酸的相互热异构反应为主，长叶松酸、新枞酸向枞酸异构的速度和比例依松香种类不同略有差异。温度在240℃～260℃时，在热异构反应的同时伴有较多的脱氢反应，其脱氢速度顺序为思茅松松香〉云南松松香〉湿地松松香〉马尾松松香。温度大于26℃时，去氢枞酸生成速度进一步加快，但同时树脂酸的脱羧等裂解反应也明显加快，使树脂酸总含量迅速下降。据此，在240-260℃下对松香进行高温热处理一定时间，可获得比原料松香颜色更浅的松香。The thermal reaction relationship of abietic-type acids in rosin is studied in detail through the treatment at 180 - 270℃ for 1 - 4 h in inert gases. As a result, the main reaction is the isomerization among palstric, abietic and neoabietic acids below 240℃ for less than 3 h, in which the rates are slightly different from rosin types. When treated at 240 - 260℃, the isomerization is accompanied with more dehydrogenation whose rate sequences are as such Simao pine rosin 〉 Yannan pine rosin 〉 slash pine rosin 〉 masson pine rosin. The dehydrogenation as well as decarboxylation goes faster over 260℃, therefore the total resin acid decreases quickly. According to the results, the lighter-colored rosin may be given out while a common rosin is treated in a temperature range of 240- 260℃.

关 键 词：松香 热处理 枞酸型树脂酸 

分 类 号：TQ351.27[化学工程] TQ645.93