摘要
乙烯装置裂解气在碱洗过程中会生成聚合物 ,与空气接触后易形成黄色粘稠态物质 ,通常称为黄油。红外光谱分析结果表明 ,黄油中不但有含氧聚合物 ,同时也含有裂解气中丁二烯的聚合物。热重 -红外光谱 ( TGA- FTIR)联用分析结果表明 ,在 30 0℃之前逸出的气体以醇类化合物为主 ,表明黄油中存在含氧聚合物 ;4 0 0℃以后逸出气体以聚合二烯烃分解产生的烯烃为主。含氧聚合物主要来自于醛酮的 Aldol缩合聚合反应 ,而裂解气中的醛酮来自于蒸汽裂解制乙烯过程中的二级反应。
A polymers are formed during caustic scrubbing cracked gas in ethylene plant,which is generally called grease.Infrared spectrum analyses show that the grease includes oxygen containing polymer and diolefin polymer.TGA-FTIR analysis show that the evolved gases below 300℃ are mainly alcohol compounds, which indicates the presence of oxygen containing polymer in the grease. The evolved gases above 400℃ are mainly olefins, which come from the decomposition of diolefin polymers.Oxygen containing polymers come from the aldol condensation of ketone and/or aldehyde,which are produced from the secondary reaction of steam cracking.
出处
《光谱实验室》
CAS
CSCD
2003年第2期287-291,共5页
Chinese Journal of Spectroscopy Laboratory
基金
国家自然科学基金资助项目 (批准号 :2 0 0 76 0 0 8)
辽宁省教育厅科研项目攀登计划资助项目 (合同号 :2 0 0 5 10 16 )
