用气相色谱/质谱法分析醚化后催化裂化轻汽油中的醚及相关烯烃

Analysis of Ethers and Related Olefines in Light Gasoline from Catalytic Cracking After Etherification by Gas Chromatography/Mass Spectrometry(GC/MS)

用气相色谱／质谱联用仪对醚化工艺过程中醚化前后的催化裂化轻汽油组成进行了定性定量分析。由定性结果分析汽油中的活泼烯烃和生成醚的类型，由定量结果分析活泼烯烃转化成醚后的量的变化情况及生成醚的多少。最终鉴定出６种烯烃参与了醚化过程，生成了４种醚。经查证，这些醚对提高汽油辛烷值均有贡献。

A method for qualitative and quantitative analysis by GC/MS and GC of ethers and related olefines in light gasoline from catalytic cracking before and after etherification has been presented. By means of the analysis of the reactive olefines and the ethers produced it is concluded that six kinds of olefines had taken part in the etherification process, they were, 2 methyl propene 1,2 methyl butene 2,2 methyl butene 1,2 methyl pentene 1,2 ethyl butene 1, and 2 methyl pentene 2,and the four ethers produced were 2 methoxy 2 methyl propane, 2 methoxy 2 methyl butane, 2 methoxy 2 methyl pentane and 3 methoxy 3 methyl pentane. These ethers are all contributing to enhance the octane number.