摘要
在中国石油大庆石化公司24万t/a淤浆法高密度聚乙烯(HDPE)装置上,采用2台聚合釜并联B型聚合工艺路线,以丁烯(C_4H_8)为共聚单体,进行了润滑油桶专用树脂的工业试生产,并考察了其加工应用性能。结果表明:当催化剂浓度一定时,在第1、第2聚合釜的氢气分压[p(H_2)]/乙烯分压[p(C_2H_4)]分别为(1.80±0.20),(0.20±0.02),C_4H_8加入量(占C_2H_4质量分数)分别为0.4%,0.6%的条件下,合成出的专用树脂的熔体流动速率为0.025~0.055 g/min,密度为0.948~0.952 g/cm^3,拉伸断裂标称应变不小于500%,拉伸屈服应力不小于20 MPa,环境应力开裂时间不短于50 h,物性达到润滑油专用树脂性能设计指标;使用专用树脂加工规格分别为1,4 L的润滑油桶,制品外观、跌落性能、壁厚、印刷性等各项性能均满足生产企业技术指标要求。
The two polymerized kettles with the parallel B polymerization process were adopted, with butene （ C4H8 ） as copolymerized monomer, the trial industrialization production of special resin for lubri- cating oil barrel was conducted in a 240 kt/a slurry high density polyethylene（HDPE） and the properties of processing application were investigated. The re- suits showed that under the conditions of certain concentration of catalyst, the partial hydrogen pres- sure [p（H2） ]/ partial pressure of ethylene [p （C2H4）] of the first and the second polymerizer was （1.80±0.20）, （0.20±0.02） separately, C4H8 addition （ mass fraction of C2H4 ） was 0.4% , 0.6% respectively, the melt flow rate （MFR）of compounded special resin was 0. 025-0. 055 g/min,the density was O. 948-0. 952 g/cm3 ,the ten- sile fracture nominal strain was not less than 500% , the tensile yield stress was not less than 20 MPa, the cracking time of environmental stress was not less than 50 h, the physical properties reaching the de- sign standard of special resin for lubricating oil; the lubricating barrel with 1,4 L specification was pro- cessed by special resin, and its appearance, drop performance, wall thickness, printing performance and other indexes all met the technical indicators of manufacturing enterprises.
作者
王世华
张明强
李冬霞
于波
WANG Shi-hua;ZHANG Ming-qiang;LI Dong-xia;YU Bo(Daqing Petrochemical Research Center,PetroChina,Daqing 163714,China;Anruijia Petroleum Chemical Co Ltd,Anda 151400,China)
出处
《石化技术与应用》
CAS
2018年第5期304-307,共4页
Petrochemical Technology & Application
关键词
高密度聚乙烯
淤浆法聚合
乙烯
丁烯
润滑油桶
专用树脂
熔体流动速率
相对分子质量分布
high density polyethylene
slurrypolymerization
ethylene
butane
lubricating oilbarrel
special resin
melt flow rate
relative molec-ular weight distribution
