化学反应和气相色谱法联合测定含烯汽油中共轭二烯烃含量 |
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引用本文: | 徐亚贤,张龙,吕九琢.化学反应和气相色谱法联合测定含烯汽油中共轭二烯烃含量[J].石油化工,1998(5). |
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作者姓名: | 徐亚贤 张龙 吕九琢 |
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作者单位: | 北京石油化工学院化工系 |
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摘 要: | 建立了利用共轭二烯烃与马来酸酐的Diels-Alder特性反应和1m×1.7mm(id)非极性固定液SE-30填充柱气相色谱法联合分析含烯汽油中的共轭二烯烃含量的方法。该柱能用低碳数的正构烷烃如正十一烷作内标物,内标物与油样组份分离很好,色谱分析一次4min,油样的相对标准偏差为1.7%。在一定的化学反应条件下,用I2和AlCl3作催化剂,当I2、AlCl3与共轭二烯烃的物质的量比分别为0.8×10-5和(1~2)×10-3时,异戊二烯有最高的转化率分别为68.51%和98.18%,回流反应装置的挥发损失率为0.28%。
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关 键 词: | 共轭二烯烃 石油产品 Diels-Alder反应 填充柱气相色谱法 |
Determination of Conjugated Dienes in Petroleum Products by the Combined Method of Chemical Reaction with Gas Chromatography |
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Abstract: | he content of conjugated dienes in petroleum products is determined by the method of combination of chemical reaction with gas chromatographyThe chromatographic column is a 1m×1.7mm (id) packed column coated with nonpolar stationary phase SE 30Normal paraffin hydrocarbons of low carbon number (n C011) can be used as internal standard compound which separated readily from the oil componentsA single run of chromatographic analysis takes 4 minThe relative standard deviation in analytic results is 1.7% Iodine and aluminium chloride are used as the catalyst for Diels Alder reaction between conjugated dienes and maleic anhydrideThe vapor losses of the vessel of return current are studiedUnder the specific conditions of chemical reaction,when the mole ratio of iodine to conjugated dienes is 0.8×10-5,the conversion of isoprene has a maximum value of 6851%;when the mole ratio of aluminium chloride to dienes is 1~2×10.3,the conversion is 98.18%The vapor losses of the vessel is 0.28% |
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Keywords: | conjugated dienes petroleum products Diels Alder reaction gas chromatography |
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