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Study on Separation of Mixed 1,2,4,5-tetramethylbenzene —the by-production of Coal from Gasoline

Author: ZhuWeiNa
Tutor: ZhangWeiJiang
School: Tianjin University
Course: Chemical Engineering
Keywords: Coal liquefaction Distillation Durene Partial three toluene
CLC: TQ522.6
Type: Master's thesis
Year: 2010
Downloads: 144
Quote: 0
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Abstract


Durene and partial three toluene basic organic chemical raw materials, widely used in industry . They are typically isolated from the reformer aromatic device C9 , C10 fraction . In recent years , due to the advent of the oil crisis , the reforming unit catalyst continuous improvement , C9 , C10 aromatic fraction of the initial boiling point higher and higher , to make them less and less content in the aromatic fraction , the size of the downstream products constantly expand their market prices remain high . A byproduct of coal liquefaction project in Shanxi mixed toluene solution containing a certain amount of durene , partial three toluene and solvent oil , they are high value-added products . In order to optimize the product structure and increase economic benefits , the materials separation and purification . In this paper, experimental materials is a by-product of the coal liquefaction project . Based on the literature and the nature of the materials to be separated , we need a combination of distillation and crystallization separation method . During the experiment , conducted a series of experiments focused on distillation and crystallization separation sequence and the target product purity . The same time, the combination of the characteristics of this material and draw on the basis of the experimental results of a company Hebei , identified by a reasonable separation scheme , and a partial three toluene and the purity of a purity of 95 % to 97 % of the durene meet Preparation customer requirements. In this paper , on the basis of experimental studies , reference petrochemical partial three toluene and durene production process , and the characteristics of the continuous industrial production , the initial selection process of the material separation process , draw the flow chart of the process separation , and the use of commercial software Aspen plus the distillation separation process simulation to determine the feasibility of the distillation separation process , provides a theoretical basis for industrial design and application .

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CLC: > Industrial Technology > Chemical Industry > Coke chemical industry > The high temperature carbonization of coal > Chemical Products Processing
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