共查询到19条相似文献,搜索用时 171 毫秒
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研究了BCZ型催化剂在Hypol工艺聚丙烯(PP)装置上的工业应用情况,分析了使用BCZ型催化剂进行丙烯聚合时装置运行情况和PP性能,并与NA型催化剂进行了对比。结果表明:与NA型催化剂相比,BCZ型催化剂活性提高约25%,但氢调敏感性降低;使用BCZ型催化剂,生产负荷分别为6.5,9.0 t/h左右时,催化剂消耗量分别为0.030,0.034 kg/t左右,氢气消耗量约为0.65,0.56 Nm3/t,与使用NA型催化剂相比氢气消耗量分别提高约20%,4%;用BCZ型催化剂生产的PP粉料的颗粒形态较好、超细粉含量较低、等规指数降至98.5%,PP粒料的刚性略好。 相似文献
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以DQC-602型催化剂为主催化剂,三乙基铝为活化剂,环己基甲基二甲氧基硅烷为外给电子体,在5 L聚合釜中进行丙烯本体聚合,研究了不同聚合温度和预聚合温度条件下,DQC-602型催化剂和用其制备的聚丙烯(PP)的性能,考察了不同n(Al)/n(Si)的条件下用DQC-602型催化剂制备的PP的等规指数调节性能。结果表明:DQC-602型催化剂具有聚合活性高、立构定向性高的特点,用其所制PP的等规指数在96.5%~98.9%可调、粉料的细粉含量低;提高聚合温度,可提高DQC-602型催化剂的活性和PP的等规指数,PP的相对分子质量分布变窄;提高预聚合温度,可降低PP的细粉含量。 相似文献
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研究了丙烯聚合用BCZ型Ziegler-Natta催化剂的3个产品——BCZ-108,BCZ-208,BCZ-308在气相Innovene工艺装置上生产和开发的各种聚丙烯牌号的性能。结果表明:颗粒状BCZ型催化剂综合性能优良,适于在无预聚合单元气相装置中使用,装置运行稳定,聚合物粉料颗粒形态保持良好,细粉少;BCZ-108适用于均聚、无规共聚以及抗冲共聚聚丙烯的生产;BCZ-208活性高,定向能力高,氢调敏感性好,生产的聚丙烯可溶物少,适用于高性能纤维专用树脂、高熔体流动速率无规共聚和均聚物的生产;BCZ-308氢调不敏感,生产的聚丙烯相对分子质量分布宽,加工性能好,适用于低熔体流动速率、宽相对分子质量分布聚丙烯的生产和开发。 相似文献
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考察了国产BCM型催化剂在Innovene气相法聚丙烯(PP)装置上的工业应用,并开发出超柔无纺布专用PP新产品——PPR-Y40-V。结果表明:BCM型催化剂具有很高的活性,最高达63.3 kg/g,且氢调敏感性好;PPR-Y40-V粉料粒径较大且粒径分布窄,粒径大于0.85 mm的PP粉料占94.1%;BCM型催化剂完全可以用于Innovene气相法PP工艺。 相似文献
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采用ASPEN PLUS的Polymer Plus对SPG聚丙烯技术中本体淤浆聚合工段和气相卧釜工段的两个关键的技术进行了较深入的研究。模拟结果表明,淤浆聚合反应收率在52%~58%时,聚丙烯总收率最高。淤浆反应温度提高,聚丙烯总收率和淤浆反应收率都提高。随着气相反应温度提高,气相反应收率先下降随后缓慢提高。加入少量氢气可以使聚丙稀数均分子量快速下降,聚合物分散度快速增加,而当氢气超过一定量以后,这种变化趋缓。为了确保反应器体积的充分利用和催化剂活性基本消耗完,要确定淤浆反应器体积和气相釜的体积和反应温度的匹配关系。根据反应热分布相应采用非均匀冷凝回流的方法,可以解决采用均匀冷凝回流方式时卧釜温度控制比较困难的问题。最后,提出了一些优化卧釜气相聚合流程的建议。 相似文献
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Aihua He Weiping Zheng Yangwei Shi Guoqing Liu Wei Yao Baochen Huang 《Polymer International》2012,61(10):1575-1581
A series of isotactic polybutene‐1/polypropylene (PB/PP) alloys with spherical morphology were prepared by MgCl2‐supported Ziegler‐Natta catalyst with sequential two‐stage polymerization technology. The first formed PP particles were used as micro‐reactors to initiate the bulk precipitation polymerization of butene‐1 further. The porous PP particles as a hard framework may prevent the adhesion of PB particles during the bulk precipitation polymerization process. At the same time, the bulk precipitation polymerization process allows for maximization of the butene‐1 polymerization rate and simplifies the butene‐1 polymerization process considerably. Finally, spherical PB alloys with a super‐high molecular weight PB component and adjustable PP component were synthesized in situ within the reactor. The structures and properties of the PB/PP alloys were characterized by gel permeation chromatography, 13C nuclear magnetic resonance, Fourier transform IR, scanning electron microscopy, differential scanning calorimetry and X‐ray diffraction. The results showed that the MgCl2‐supported Ziegler‐Natta catalyst showed relatively high stereospecificity and efficiency for both propylene and butene‐1 polymerization. The incorporation of propylene on the PB matrix affects the properties of the final products markedly. The PB/PP alloys are expected to have a broader range of applications as a new family of high performance materials. Copyright © 2012 Society of Chemical Industry 相似文献
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球形催化剂在液相本体聚丙烯装置上的应用 总被引:1,自引:0,他引:1
在间歇液相本体法聚丙烯装置上采用CS-1型高效催化剂进行生产的同时,进行CS-2和HDC球形催化剂应用试验,两烯不需要再精制,结果表明,采用CS-2和HDC球形催化剂的单釜产量达到CS-1型高效催化剂的水平,产品质量符合Q/SHC001-1998要求,聚丙烯颗粒呈球形,加工流动性好,粉尘污染减少。 相似文献
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I. I. Salakhov A. Z. Batyrshin S. A. Sergeev G. D. Bukatov A. A. Barabanov M. A. Mats’ko A. G. Sakhabutdinov V. A. Zakharov 《Catalysis in Industry》2016,8(3):213-216
The effect of the particle size of an IK-8-21 domestic titanium-magnesium catalyst on the properties of polypropylene (PP) produced during the polymerization of propylene in a liquid monomer is studied. Catalysts with particle sizes of 20 to 64 μm are shown to have high activity and identical sensitivity to hydrogen and allow PP to be obtained with a narrow distribution of particles over size, high isotacticity, and close values of crystallinity, melting temperature, and physicomechanical properties. A slight decrease in the activity and bulk density of PP powder is observed when the average size of catalyst particles is increased from 20 to 43 μm. A more notable reduction in the activity and bulk density of PP powder is observed for catalyst with particle sizes of 62 to 64 μm. IK-8-21 catalyst is not inferior to its foreign analogues with respect to the properties of the resulting PP. 相似文献