聚丙烯生产工艺及影响聚合反应杂质分析

采用间歇式的聚丙烯生产工艺技术,利用丙烯聚合反应,得到聚丙烯。对影响聚合反应的杂质因素进行分析,通过控制影响聚合反应的各项因素,达到设计的聚丙烯的产品质量目标。以最少的投入,获得最大的效益,提高聚丙烯的生产效率。     

聚丙烯生产工艺及影响聚合反应杂质分析

本文从某厂的聚丙烯生产工艺、聚合反应、操作指标、杂质分析与控制等方面对聚丙烯的平稳生产进行了分析和讨论。本装置聚丙烯的生产是以间歇式液相本体法生产。以丙烯为原料,经丙烯精制,聚合反应,闪蒸去活,包装等系统生产聚丙烯成品。生产中原料的分析和精制是关系聚合反应平稳的重要保证。原料不稳定会造成反应不正常、生产波动较大,催化剂、活化剂用量加大,操作控制困难,致使聚丙烯产品质量不稳定,甚至造成部分设备停工事故。本文主要针对聚丙烯生产中杂质含量的问题开展深入的研究。     

聚丙烯生产中原料丙烯的精制

文章根据丙烯净化的相关原理,考虑其经济价值和工艺流程的要求建立了原料丙烯的净化顺序为:原料丙烯自界区→活性炭塔粗脱硫→固碱塔粗脱水加粗脱硫→分子筛脱水塔脱水→丙烯脱硫塔深脱硫→CO汽提塔脱CO、CO2、氧等不凝气→丙烯脱水塔神脱水→脱砷塔脱砷。     

原料中杂质对丙烯聚合工艺的影响

分析并总结原料杂质对聚合反应及其产物聚丙烯的影响,重点阐述水、甲醇、一氧化碳、硫化物四种杂质的影响,为生产过程的控制提供理论依据。     

聚丙烯生产的自动化控制

通过DCS系统灵活的控制手段，实现了聚合反应的自动控制，有效的缩短了反应时间，提高了反应质量，降低了工人的劳动强度。     

色谱相对外标法定量聚合级丙烯中烃类杂质

本方法参照ＧＢ３３９２－８２标准,采用气相色谱相对外标法定量聚合级丙烯中烃类杂质。该方法在实际生产中应用,操作简单,计算方便。     

聚合釜传热对聚合反应的影响

本文旨在通过对１２ｍ＾３聚合釜传热的计算,论证聚合釜的传热状况,寻求聚合反应操作的方法和操作条件,以解决聚丙烯生产中的传热问题,促进降丙烯的稳定生产。     

纺丝用聚丙烯中固体杂质的分析

高速纺丝级 PP 中的固体杂质经常造成喷头滤网堵塞,并因此影响纤维产品的质量。本文用扫描电子显微镜和 X 光能谱仪对滤网堵塞物、添加剂硬脂酸钙及纺丝成品中存在的固体杂质进行了分析研究。得到了上述杂质的元素定性、定量、表面形态及微区分析的详细数据。讨论了这些污染物的来源及其对纤维成品质量的影响,并就这些问题的解决提出了建议。     

丙烯聚合的Monte Carlo模拟(Ⅰ)活性杂质对丙烯聚合的影响

1 INTRODUCTION Polypropylene is a popular thermoplastic polymer, and produced via bulk polymerization in petroleum chemical industry. The molecular configuration of polypropylene and the characteristics of polymer can be controlled by the catalyst and polymerization method. Furthermore, other factors, such as impurities in the material and polymerization conditions, also influence the industrial production. Catalyst influences the rate and the quality of polymer, is a key factor of the in…     

丙烯杂质对聚合的影响及消除措施

在液相本体法生产聚丙烯工艺中,原料丙烯的质量直接影响到聚合反应,文章探讨了丙烯中的水、氧、烃类、一氧化碳、二氧化碳、硫、砷等杂质对丙烯聚合反应的影响,同时讨论了去除丙烯杂质的方法和工艺调整等措施。     

降低聚丙烯生产丙烯单耗的措施及效果

庆阳石化聚丙烯装置的丙烯单耗高,不但浪费了丙烯资源,增加生产成本,还污染环境。对丙烯单耗的因素进行了分析,提出了相应措施,收到了明显效果。     

煤基石脑油裂解丙烯在聚丙烯生产中粉料结块问题及处理

国家能源集团宁夏煤业有限责任公司烯烃二分公司聚丙烯装置,采用工艺为LUMMUS NOVOLEN工艺,所用原料丙烯来自世界上首套以煤基石脑油为原料的乙烯装置。自2017年9月投产以来,聚丙烯反应器内一直存在不同程度的粉料结块问题。结合近年来对原料组分的分析和"三剂"的使用,对反应器内粉料结块问题进行剖析和总结,提出相应处理建议,以提高反应器稳定运行。     

New Integrated Catalytic Membrane Processes for Enhanced Propylene and Polypropylene Production

Newly reported integrated processes are discussed for aliphatic (paraffin) hydrocarbon dehydrogenation into olefins and subsequent polymerization into polyolefins (e.g., propane to propylene to polypropylene, ethane to ethylene to polyethylene). Catalytic dehydrogenation membrane reactors (permreactors) made by inorganic or metal membranes are employed in conjunction with fluid bed polymerization reactors using coordination catalysts. The catalytic propane dehydrogenation is considered as a sample reaction in order to design an integrated process of enhanced propylene polymerization. Related kinetic experimental data of the propane dehydrogenation in a fixed bed type catalytic reactor is reviewed which indicates the molecular range of the produced C₁-C₃ hydrocarbons. Experimental membrane reactor conversion and yield data are also reviewed. Experimental data were obtained with catalytic membrane reactors using the same catalyst as the non-membrane reactor. Developed models are discussed in terms of the operation of the reactors through computational simulation, by varying key reactor and reaction parameters. The data show that it is effective for catalytic permreactors to provide streams of olefins to successive polymerization reactors for the end production of polyolefins (i.e., polypropylene, polyethylene) in homopolymer or copolymer form. Improved technical, economic, and environmental benefits are discussed from the implementation of these processes.     

丙烯聚合的Monte Carlo模拟(Ⅰ)活性杂质对丙烯聚合的影响

A comprehensive mechanism for propylene polymerization was proposed by considering the effects of main impurities in the material on propylene polymerization. According to the proposed mechanism, Monte Carlo simulation was employed to investigate the polymerization kinetics in order to determine the effects of the main impurities on the polymerization. Significant influences of the main impurities on the rate, number-average degree and controlling capability of hydrogen of the polymerization were analyzed.     

Spheripol本体法丙烯聚合过程研究

通过对Spheripol本体法聚丙烯生产工艺的分析,指出表征树脂质量的性能指标,进而分析各种操作变量对于树脂性能指标的影响。     

气相色谱法聚合级丙烯中烃类杂质的测定

用优化后的色谱分析条件分析工业用高纯度丙烯中烃类杂质,采用与标准气对照保留时间进行定性,用峰面积归一化法进行定量。此法一次进样,能较好分离含多组分的烃类杂质,并与原扬州石化标准相比该法具有操作简单、速度快、准确度高、重复性好、检测灵敏度高等特点。