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Separation and Purification of Cyclohexene Oxide

Author: LiLe
Tutor: ZhangYaDong
School: Zhengzhou University
Course: Chemical Engineering
Keywords: Heat-sensitive Epoxycyclohexane Vacuum batch distillation Mathematical simulation
CLC: TQ223.26
Type: Master's thesis
Year: 2008
Downloads: 40
Quote: 0
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Abstract


The separation solvent-free synthesis reaction solution epoxycyclohexane work system , for photosensitive the main product Epoxycyclohexane with a high degree of thermal nature , as well as epoxycyclohexane ternary oxygen ring structure with a high reactivity and unstable characteristics , composed on the basis of the gas chromatographic analysis of the product , according to the basic theory of the separation process , as well as heat-sensitive substances distillation to a period of de - light components , two stage vacuum batch distillation process epoxy cyclohexane efficient separation, purification . Literature provides a mathematical model based on reasonable preliminary design of the second paragraph of products tower vacuum batch distillation process . Determine that the yield requirement is 0.80-0.90 , heavies ethylene glycol monobutyl ether added in an amount not less than 24% . The number of theoretical plates calculated distillation using a the intermittent vacuum distillation concise design law 10 , the minimum reflux ratio of 5 . To investigate the impact of various factors on the vacuum distillation process and distillation effect , the second paragraph of the vacuum distillation operation and operating conditions : total reflux time 120 - 150min , slowly adjust the temperature control instrument approach small - large - a small uniformed warming rate available to reduce the distillation cycle effect : taken 6-8-10 uniformed reflux ratio , the distillation of all the indexes are effective increase in the conditions, the distillation product epoxycyclohexane purity by gas chromatographic analysis to reach 99.5% , the yield of the one - way epoxycyclohexane > 85% good results , the product has been tested to achieve domestic product high-quality technical requirements . According to the characteristics of the matter is , the object - based distillation process model pseudo-binary distillation reasonable assumptions , establish a constant molar liquid hold-up model . Simulation model and two implicit numerical integration methods , the use of more precise than the vapor-liquid equilibrium relationship of general linear the dewpoint -T model to calculate the vapor-liquid equilibrium relationship as the boundary conditions on the simulation results and experimental results verified . Simulation results agree well with the experimental results prove the pseudo-binary distillation assumptions reasonable , provided the basis for the the new method industrialized part of the engineering design of the separation process .

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic alcohols (alcohols, hydroxy compounds) and its derivatives > Alcohol derivatives > Olefin oxides ( epoxides,cyclic ethers )
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