管式法工艺LDPE密度的控制方法  

Density control method of LDPE in tubular process

作　　者：郭晓东 宋江坤 Guo Xiaodong;Song Jiangkun(Shenhua Xinjiang Chemical Company Limited,Urumqi 831404,China)

机构地区：[1]神华新疆化工有限公司,新疆维吾尔自治区乌鲁木齐市831404

出　　处：《合成树脂及塑料》2020年第3期40-43,90,共5页China Synthetic Resin and Plastics

摘　　要：基于管式法工艺生产低密度聚乙烯(LDPE)的实际情况,对影响LDPE密度的反应压力、反应温度、原料杂质含量和调整剂的类型进行了分析,并提出了控制LDPE密度的有效方法。结果表明:对于牌号为2426H的LDPE,通过降低反应压力和提高反应温度,提高甲烷和乙烷含量,采用丙醛和丙烯的复合调整剂等方式均能降低LDPE密度,可将其密度从0.9253 g/cm^3降至0.9230 g/cm^3,在满足市场需求的同时提高2426H的品质。The reaction pressure,reaction temperature,impurity content in raw material,and types of regulators that affect the density of low-density polyethylene(LDPE)were analyzed with respect of the actual situation in LDPE high-pressure tubular process,and an effective method for controlling the density of LDPE products was proposed.The results show that the density of LDPE 2426H can be reduced from 0.9253 g/cm^ 3 to 0.9230 g/cm 3 by adding compound modifier of propionic aldehyde and propylene,lowing the reaction pressure,improving the reaction temperature as well as the contents of methane and ethane,which can improve the quality of 2426H while meeting the market demand.

关 键 词：低密度聚乙烯 密度 支化 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]