2017/11/03 16:05
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产品配置单:
科捷通用气相/GC5890N气相色谱仪
型号: GC 5890N
产地: 江苏
品牌: 南京科捷
¥3万 - 5万
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粗苯是煤在高温炼焦过程中回收的主要化工产品之一,是现代煤化工煤焦化产业链中的主要产品。粗苯中含有多种有机化工原料,经加氢处理后可作为动力苯,也可蒸馏分离出苯、甲苯、二甲苯等重要的基本有机化工原料。根据我国现行的产业政策,国家鼓励粗苯加氢精制工艺生产焦化苯、甲苯和二甲苯(简称三苯)。因此三苯含量成为粗苯的一个重要的质量指标。经查阅资料,三苯测定的方法目前尚无现行的国家标准,大部分企业使用气相色谱面积归一法,该方法定量准确性较差。若采用修正归一法,粗苯组分比较复杂,修正系数较难获得;若采用内标法,内标物的选择也是一大难题。因此建立一种能快速准确地测定粗苯中三苯含量的方法对焦化产品的深加工及提高其资源综合利用率具有重要意义。
本文建立了毛细管柱气相色谱法测定粗苯中二苯含量的分析方法。该方法模拟粗苯样品组分,准确配制已知含量的三苯混合液作为标准对照样,采用单点对照法定量,取得成功。该方法快速、准确、简便,便于推广应用。
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