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2003年9月15日,北京燕化高新技术股份有限公司(简称燕化高新)在原YS-841催化剂基础上研制开发的升级换代产品——YS-842聚丙烯高效载体催化剂顺利通过由中国石油化工股份有限公司(简称中国石化)科技开发部组织的鉴定。在会上,燕化高新、北京燕化石油化工股份有限公司树脂应用研究所和聚丙烯事业部的技 相似文献
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介绍了在中沙(天津)石化有限公司对上海立得催化剂公司生产的适合气相流化床工艺的SLC-S催化剂进行了工业化应用试验的情况,考察了催化剂的活性、氢调性能、共聚性能及还原比对它们的影响;测试了催化聚合产品的堆积密度、平均粒径、流化密度及还原比对它们的影响,并将这些指标与国产同类催化剂进行了对比,结果显示SLC-S催化剂的性能指标优于国产同类催化剂且对还原比的响应不敏感;测试了最终产品的性能,结果表明,产品的综合指标达优品级。 相似文献
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CTV系列乙烯法醋酸乙烯催化剂工业应用 总被引:4,自引:0,他引:4
对比了几种乙烯法制醋酸乙烯的国产与进口催化剂的工业应用情况,结果表明,国产CTV系列醋酸乙烯催化剂的各项性能均优于同类进口催化剂水平,尤其是CTV-Ⅳ型催化剂在活性和选择性方面已领先于同类催化剂的国际水平。 相似文献
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《精细化工原料及中间体》2017,(11)
<正>近日,YS-9010银催化剂在上海石化1号乙二醇装置完成一周年运行,这也是该催化剂在国内首次工业化应用。考核运行期间,装置运行稳定,催化剂的选择性达到87.66%,符合协议指标。YS-9010银催化剂由中国石化北京化工研究院燕山分院研制,其选择性比该院此前研制出的YS-8810银催化剂更高。而据了解,YS-8810银催化剂已经标志着中国石化拥有了自主开发和生产高选择性银催化剂的能力,实现高选择性 相似文献
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正日前,由北京化工研究院燕山分院研制、催化剂分公司负责生产的YS-9010银催化剂,在上海石化1号乙二醇装置完成近4个月驯化。结果显示,该批催化剂比原YS-8810银催化剂选择性高0.5%,节约乙烯150 t,实现预期目标。2016年9月,上海石化借助1号乙二醇装置大修机会,使用YS-9010银催化剂,这是该款催化剂国内首次工业应用。此次YS-9010银催化剂的驯化成功,进一步巩固了中国石化在银催化剂生产研发方面的领先地位。 相似文献
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在MgCl2溶解过程中加入内给电子体,开发了一种新型丙烯聚合用BCZ型催化剂,并在5 L聚合釜中进行了本体聚合考核评价,在12 m3小本体工艺装置上进行工业应用试验,在25 kg/h的连续法Innovene气相工艺装置进行中试试验。研究表明:用BCZ型催化剂制备聚丙烯(PP)时,催化剂活性高出国产同类催化剂近50%,氢调敏感性好,同样氢气用量下,PP的熔体流动速率可提高25%左右;所制PP的相对分子质量分布大于7.5,等规指数高;BCZ型催化剂可用于小本体法工艺、连续法气相工艺装置制备均聚和共聚PP。 相似文献
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丙烯环管聚合催化剂的应用比较 总被引:1,自引:1,他引:0
1997年,我国相继自行设计建设了几套丙烯环管聚合生产装置,生产中也成功地应用了国产N-2和 CS-2型催化剂。国产催化剂的应用显示,效果良好,两种国产催化剂反应活性均高于进口催化剂,某些指标略好于进口催化剂。证明国产催化剂完全可代替进口催化剂用于环管反应器。 相似文献
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Modeling and experimental analysis for syndiospecific polymerization of styrene over silica-supported metallocene catalyst was carried out. A detail model was developed by coupling the single particle growth model (PGM) with particle population balance equation. The model was employed to predict the effects of intraparticle mass transfer limitations and the initial catalyst particle size on the rate of polymerization and the particle size distribution (PSD) of syndiotactic polystyrene (sPS). The single PGM, based on a modified polymeric multigrain model, was first utilized to calculate the single particle growth rate and polymerization rate under intraparticle mass transfer limitations and different initial catalyst particle sizes. Then, the model was solved simultaneously with particle population balance equation to estimate the PSD of sPS under the same limitations. The single PGM results showed a significant radial distribution of styrene concentration across polymer growth. It was further noticed that the diffusion resistance was most intense at the beginning of the polymerization reaction and the effects of polymerization rate were stronger. Moreover, it appeared that increasing the initial catalyst particle size led to lower rate of polymerization. The PSD simulation results revealed that the mass transfer limitation, as well as the initial catalyst particle size made a strong impact on the PSD of sPS. In addition, the simulation results obtained from this model showed good agreement results with experimental data of sPS. 相似文献
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A dimethylsilylene‐bridged metallocene complex, (CH3)2Si(Ind)2ZrCl2, was supported on a nanosized silica particle, whose surface area was mostly external. The resulting catalyst was used to catalyze the polymerization of propylene to polypropylene. Under identical reaction conditions, a nanosized catalyst exhibited much better polymerization activity than a microsized catalyst. At the optimum polymerization temperature of 55°C, the former had 80% higher activity than the latter. In addition, the nanosized catalyst produced a polymer with a greater molecular weight, a narrower molecular weight distribution, and a higher melting point in comparison with the microsized catalyst. The nanosized catalyst's superiority was ascribed to the higher monomer concentration at its external active sites (which were free from internal diffusion resistance) and was also attributed to its much larger surface area. Electron microscopy results showed that the nanosized catalyst produced polymer particles of similar sizes and shapes, indicating that each nanosized catalyst particle had uniform polymerization activity. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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透明LLDPE膜专用料的研制 总被引:6,自引:0,他引:6
采用助剂配方后改性的技术方法,研制开发出生产透明线型低密度聚乙烯(LLDPE)膜专用料的助剂配方体系YS-1。YS-1为有机成核剂与无机成核剂的复配体系,该助剂体系具有无味、密度大等特点;用其改性生产的透明LLDPE专用料的雾度降至11%以下;膜的拉伸强度、断裂伸长率亦有所提高。此外,在透明LLDPE膜专用料助剂配方研制过程中发现:成核剂颗粒的大小及其尺寸分布是影响其增透效果的主要因素。 相似文献
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评价了LH-1型催化剂催化乙烯均聚合,乙烯-丙烯、乙烯-1-丁烯共聚合的性能.与国内工业化生产的催化剂进行对比,研究了LH-1型催化剂的粒径分布、催化活性、氢调敏感性.结果表明:LH-1型催化剂的粒径分布均匀,细粉含量少,且具有较高的氢调敏感性;在聚合温度80℃、压力0.8 MPa、氢气分压0.2 MPa的乙烯淤浆聚合工艺下聚合2h,LH-1型催化剂的活性较高,达5.36×104 g/g,优于对比催化剂;用LH-1型催化剂制备的高密度聚乙烯的堆密度较大,达0.350g/cm3,乙烯-丙烯、乙烯-1-丁烯共聚合性能好. 相似文献
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针对扬子石化公司乙烯氧化制环氧乙烷工业规模的壁冷式固定床反应器,在YS-6型银催化剂宏观动力学模型的基础上加以修正,获得了YS-7型银催化剂宏观动力学模型,建立了环氧乙烷合成固定床反应器的一维拟均相模型,通过模型计算值与工业生产实际值的比较,两者相差很小,验证了反应器模型和所用的宏观动力学模型的准确性,可用作扬子石化公司环氧乙烷合成反应器的模拟与操作优化。 相似文献
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超临界溶液快速膨胀法制备二氯二茂钛微粒及催化乙烯聚合 总被引:4,自引:0,他引:4
为克服茂金属催化剂得到的聚合物形态难以控制、表观密度较低、易粘釜和不适于气相淤浆聚合等缺点,以超临界溶液快速膨胀过程为手段,以期制得颗粒分布均匀的细微催化剂颗粒,继而得到形态良好的聚合物.作为超临界流体技术的基础,首先测定了二氯二茂钛在超临界丙烷中的溶解度.在此基础上,用RESS方法制得了均匀的超细催化剂颗粒,且系统考察了溶液浓度、预膨胀温度、喷嘴结构和接收距离对沉析颗粒粒径的影响.最后,将RESS所制得的催化剂颗粒进行乙烯淤浆聚合,并分析聚合物形态结构.实验结果表明,在温度为383.15~408.15 K和压力为10~35 MPa范围内,溶解度随温度的增加而增加,随压力的升高而增加,说明在该操作范围内,不存在反向区.RESS操作的结果显示,二氯二茂钛颗粒粒径随溶液浓度的增大而减小,随预膨胀温度的升高而增大,而喷嘴直径的减小和喷嘴长度的增加将使得颗粒粒径增大,而收集距离的增加将使得颗粒粒径先增加后减缓,直至不再变化.通过对原始的催化剂颗粒和RESS制得的催化剂颗粒进行乙烯淤浆聚合表征发现,相比于原始催化剂,由于烯烃催化剂的复制原理,RESS制得的催化剂颗粒的聚合物具有良好的形态. 相似文献
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Dramatic changes occur during the initial stages of olefin polymerization over heterogenous catalysts. As polymer accumulates, the catalyst fragments and the void space within the growing particle becomes filled with polymer. The changing monomer transport rate to the active sites, dissipation of heat and stress with the particle, and eventually, dispersion of catalyst fragments within the growing particle can control the polymerization. We focus on the changes in, and influence of, polymer, catalyst and void morphology during the nascent polymerization for silica supported chromium oxide catalysts. We find that the course of the polymerization depends on the initial stages yet is seldom considered in polymerization models. We review several years of morphological characterization that identify the important physical phenomena which occur during nascent heterogeneous olefin polymerization. 相似文献