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Position: Home > Articles > Oxidation Reaction of Rosin by Nitric Acid Journal of Zhejiang Forestry Science and Technology 2008,28 (1) 5-9

松香的硝酸开环氧化

作  者:
刘祖广;雷福厚;安鑫南
单  位:
南京林业大学化学工程学院;广西民族大学化学与生态工程学院
关键词:
松香;硝酸;氧化;酸值;结构
摘  要:
研究了硝酸氧化松香的反应,以探讨硝酸用量和反应时间对氧化反应的影响。采用红外光谱、紫外光谱、液质联用对松香氧化产物的结构进行了测定。实验结果表明:以硝酸为氧化剂,乙酸乙酯为溶剂,在反应温度为75℃,反应时间为8 h,n硝酸∶n松香=22∶1时,氧化产物酸值达到318 mg KOH/g。松香中的主要成分已发生了氧化,共轭双键断裂生成了多羧基氧化产物,初步推断出可能的3个主要氧化产物的结构分别为:3-异丙基-6-(1,3-二甲基-2,3-二羧基环己基)苯甲酸,6-(1,3-二甲基-2,3-二羧基环己基)-1,3-苯二甲酸,12-硝基-7,11,14-三羰基-△8(9)-枞酸。
译  名:
Oxidation Reaction of Rosin by Nitric Acid
作  者:
LIU Zu-guang1,LEI Fu-hou1,AN Xin-nan2(1.Guangxi University for Nationalities School of Chemistry and Ecological Engineering,Nanning 530006,,China;2.Nanjing Forestry University School of Chemical Engineering,Nanjing 210037,China)
关键词:
rosin;nitric acid;oxidation;acid value;structure
摘  要:
Experiment was carried out on effect of dosage of nitric acid and reaction duration on oxidation of rosin by nitric acid.Determination products by FTIR,UV and LC-MS showed that the acid value of the oxidation product topped 318 mgKOH/g under the condition of the ethyl acetate as solvent,reaction temperature at 75℃ and the reaction duration by 8 hours,mole ratio of n(nitric acid)∶n(rosin) = 22∶1.It was found that the carboxyl in oxidation product increased evidently.Three possible compounds in oxidation products were as following: 2-(2,3-dicarbxyl-1,3-dimethyl cyclohexyl)-4-isoprolyl benzoic acid,6-(2,3-dicarboxyl-1,3-dimethyl cyclohexyl)-1,3-phthalic acid and 12-nitro-7,11,14-triketo-△8(9)-abietic acid.

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