共查询到16条相似文献,搜索用时 46 毫秒
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建立了乙氧基化管式反应器的数学模型,考察了各参数对反应器温度分布的影响,认为反应器具有较强的参数敏感性,冷却剂进口温度是影响反应器温度分布的主导因素。分析了反应器的参数敏感性,得到了反应器的安全操作区域,对放大和生产操作提供了理论指导。 相似文献
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非离子表面活性剂由于其所具有的优良性能和较广泛的应用领域,自1930年问世以来一直受到世界各国生产厂家的重视.各厂家相继都在不断地开发新的品种,新的生产工艺和新的生产设备以使它的生产更加完善.乙氧基化反应,作为生产非离子表面活性剂的重要反应也一直不断被进行着新的改进.比较知名的有意大利Press公司生产的 相似文献
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脂肪醇聚氧乙烯醚及乙氧基化技术 总被引:6,自引:0,他引:6
本概述了近年来国内外脂肪醇聚氧乙烯醚的发展状况。论述了洗涤活性物的发展趋势。详细介绍了醇醚生产的乙氧基化工艺技术,对各种工艺路线进行了比较。提出发展我国醇醚生产与应用的有益建议。 相似文献
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阐述了聚乙二醇系列产品用乙氧基化装置进行工业生产及应用。详细介绍了乙氧基化装置生产聚乙二醇系列产品的规格和各项指标、生产工艺以及生产过程中的影响因素。列举了聚乙二醇系列产品在工业生产各领域的应用并进行了技术经济分析,指出原料产品价格的盈亏平衡点。 相似文献
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Numerical simulations of the reactive mixing in a commercially operated stirred ethoxylation reactor
The computational fluid dynamics (CFD) technique was applied to describe the mixing and the chemical reactions in commercially operated stirred ethoxylation reactors. Two reactor sizes in the existing ethoxylation operations were studied in this work: a laboratory-scale autoclave with a single-Rushton turbine and an industrial-scale reactor with a dual-Rushton turbine. The ethoxylation reactor contents were described as an incompressible, turbulent single-phase liquid mixing regime with chemical species undergoing heat and mass transfer. Since the accurate experimental ethoxylation flow data could not be extracted from the industrial operations, the development of the CFD model for the ethoxylation process was undertaken in two stages. The first stage simulated a single-phase liquid agitation system based on the literature with experimental data on velocities, such as Wu and Patterson [1989. Laser-Doppler measurements of turbulent-flow parameters in a stirred mixer. Chemical Engineering Science 44, 2207–2221], for a Rushton stirred reactor of standard configuration. Once validated, the numerical model was applied to compute the flow field in ethoxylation reactors. The second stage integrated the ethoxylation kinetics into the numerical model and simulated the ethoxylation process. In the simulation of the mean flow field, the qualitative features of the literature data were well reproduced. The computed results of both the ethylene oxide consumption and the temperature calculation compared very well with the measurements in the laboratory-autoclave operations. Reasonably good agreement was also reached between the simulated and experimental data on the time-dependent changes of ethylene oxide mass fraction in the bulk liquid in the industrial ethoxylation operations. These demonstrate that the CFD process model was capable of predicting the reaction behaviour and would be useful for exploration of any opportunity for increasing the ethoxylation capacity in the industrial operations. 相似文献
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介绍了环氧乙烷产能和乙氧基化项目的快速增长情况。简述了国内乙氧基化技术的进步、存在问题和工艺特点,对国内不同类型的乙氧基化技术的工艺性能和适用情况进行了对比分析。从生产事故、政府监管以及工程设计方面阐述了乙氧基化项目建设和运行的严峻形势,分析了环氧乙烷爆聚给乙氧基化生产带来的严重危害并提出解决思路。 相似文献