共查询到20条相似文献,搜索用时 15 毫秒
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Timoshenko A. V. Serafimov L. A. Ivanova L. V. 《Theoretical Foundations of Chemical Engineering》2001,35(4):373-376
Isocriterial manifolds are derived by comparing the linear distillation flowsheets and analyzed. 相似文献
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Timoshenko A. V. Patkina O. D. Serafimov L. A. 《Theoretical Foundations of Chemical Engineering》2001,35(5):458-464
Distillation flowsheets consisting of simple columns, both simple columns and complex columns with side streams, and simple column–complex column sequences are considered for zeotropic four-component mixtures. Applicability criteria are suggested for the complex columns. 相似文献
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A. V. Timoshenko 《Theoretical Foundations of Chemical Engineering》2004,38(3):251-254
A method for synthesizing distillation flowsheets with fully coupled heat and material flows using graph theory is considered. 相似文献
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基于对含多个侧线汽提和/或侧线精馏塔的复杂精馏流程的分析,构造了分离五组分的复杂精馏流程。提出了基于流程水平的多组分侧线汽提和/或侧线精馏塔的复杂精馏流程的设计方法。该法不仅可用于多组分复杂精馏流程的优化设计,并且能为复杂精馏流程的严格模拟提供良好的初值,从而为探讨复杂精馏流程的合成提供有效的途径。 相似文献
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《分离科学与技术》2012,47(13-15):2097-2108
Abstract Acetic acid is presently recovered from terephthalic acid flowsheets by distillation. This paper documents a preliminary evaluation of extraction for its recovery and recycle. Experimental data show that the solvent has a selectivity for acetic acid-water of 5 for a 50 wt. percent acid solution and 60 for 5 wt. percent acid solution. Above 10 wt. percent extractant in the solvent, addition of extractant to the solvent has the combined effect of decreasing the solvent loss to the aqueous phase and decreasing the loading of water in the solvent. The high selectivities of the solvent for acid vs. water combined with the high relative volatility of the acid vs. the solvent imply that lower energy costs with an extraction flowsheet over distillation is likely. 相似文献
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Frolkova A. V. Frolkova A. K. Zhuchkov V. I. Makhnarilova Ye. G. 《Theoretical Foundations of Chemical Engineering》2020,54(5):818-827
Theoretical Foundations of Chemical Engineering - The applications of homology and isomerism to the structure of phase diagrams and distillation flowsheets of multicomponent mixtures were... 相似文献
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A. V. Frolkova A. K. Frolkova A. V. Podtyagina V. V. Spiryakova 《Theoretical Foundations of Chemical Engineering》2018,52(5):771-778
The relationship between structures of ternary systems phase diagram, separation flowsheets including distillation columns and decanters and their energy consumption are discussed. Phase equilibrium diagrams of two ternary systems cyclohexanol + cyclohexanone + water and propanol-1 + cyclohexane + acetonitrile were studied. A number of isomeric flowsheets were proposed for separation of the first ternary mixture and the influence of devices (columns and decanters) arrangement on the flowsheets energy consumption were shown. The influence of separation conditions in a distillation column (the ratio of distillate and bottom flows) on the energy consumption of separation flowsheet were demonstrated on the example system propanol-1 + cyclohexane + acetonitrile. 相似文献
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1引言精馏序列合成是过程合成的一个重要分支。多组分精馏可分为两大类,第一类:将单一原料分离成若干纯组分;第二类:将一个或几个多组分原料分离为若干个多组分产物。20多年来,第一类精馏序列合成问题受到了极大重视,并提出了不少研究方法[1]。对第二类问题的... 相似文献
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萃取精馏技术及其在分离过程中的应用 总被引:1,自引:0,他引:1
对萃取精馏技术及其在分离过程中的研究与应用进行了讨论。从萃取精馏的基本原理与操作类型、溶剂的物理特性与筛选方法等方面进行了介绍,同时列举了萃取精馏技术在一些物系分离中的应用。最后指出了萃取精馏技术的研究方向。 相似文献
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分子蒸馏技术在天然产物分离与提纯方面的应用 总被引:9,自引:0,他引:9
分子蒸馏是一种新型的分离手段 ,具有蒸馏温度低、受热时间短、分离程度高等优点 ,在天然产物的分离与提纯方面有重要应用 ,文中对分子蒸馏技术的基本原理、在天然产物和植物药有效成分的分离和提纯中的最新应用进行了综述。 相似文献
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邻羟基苯乙醚的间歇精馏分离 总被引:1,自引:0,他引:1
通过碱洗将缩合反应产生的邻羟基苯乙醚与邻苯二乙醚分开,再通过间歇精馏确定邻羟基苯乙醚的分离工艺参数。精馏柱内径为38 mm的玻璃柱,内装边长为1.5 mm的小三角填料,填料高度为400 mm,理论板数为13块,回流比为1~2,真空为0.098 MPa,邻羟基苯乙醚精馏收率≥93%,产品纯度≥99%。 相似文献
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催化精馏在合成甲缩醛中的应用 总被引:8,自引:0,他引:8
开发了由离子交换树脂型固体酸催化剂和不锈钢丝网构成的催化填料。在内径25mm、高1000mm的玻璃反应精馏塔内进行的甲醇与甲醛合成甲缩醛的反应表明, 该催化填料具有优良的催化反应活性和高效的产物分离能力。2000h寿命考察未见活性衰退迹象。在内径150mm、高5400的不锈钢反应精馏塔内的反应同样达到了小试的水平, 显示了该催化填料良好的工业应用前景。 相似文献