详细信息
文献类型:期刊文献
中文题名:松香中枞酸型树脂酸热作用变化规律的研究
英文题名: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]
第一作者:陈玉湘
机构:[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
年份:2009
期号:2
起止页码:46-49
中文期刊名:现代化工
外文期刊名:Modern Chemical Industry
收录:CSTPCD;;Scopus;北大核心:【北大核心2008】;CSCD:【CSCD2011_2012】;
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
语种:中文
中文关键词:松香;热处理;枞酸型树脂酸
外文关键词:rosin; thermal treatment; abietic-type acid
分类号:TQ351.27;TQ645.93
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℃.
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