Dissertation
Dissertation > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aromatic compounds > Aromatic carboxylic acids and their derivatives > Aromatic acid > Benzene series acid

Production of Terephthalic Acid Process Simulation

Author LiuJie
Tutor MaHaiHong
School Tianjin University
Course Chemical processes
Keywords Paraxylene Terephthalic acid Production Process simulation
CLC TQ245.12
Type Master's thesis
Year 2007
Downloads 323
Quotes 2
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An important raw material for synthetic polyester fiber , purified terephthalic acid (PTA) general liquid phase air oxidation of p-xylene (PX) are used to generate refined crude terephthalic acid (CTA), and then further hydrogenation . PTA production technology in China mainly imported from foreign patents , technology costs , seriously affecting the PTA product costs and market competitiveness . Basic research in chemical engineering at the same time , accelerate the PTA production process simulation software development , the formation of sets localization significant . The thesis of crude terephthalic acid production section in the simulation study . Each operating unit simulation based on the use of chemical process simulation software to complete the whole process simulation of the production process of CTA . Through the comparison of the simulation results and the actual value , to verify the accuracy and reliability of the simulation . The CTA production process PX liquid phase oxidation , TA multistage crystallization , separation of acetic acid recovery and CTA dry four parts . Wherein the oxidation reactor simulation full Francis process simulation software modules and user-developed dual-stage bubble model , respectively . Two model simulation results are close to the actual value , better predictability of the two-stage bubble model , but the strong dependence of the initial value . Crystalline modules using process simulation software to simulate crystalline unit the material heat balance results and the actual value of the agreement , reasonable particle size distribution the crystallization of software modules lower accuracy than user-developed model , but suitable for large process simulation . Use of process simulation software to simulate the drying unit for solvent recovery and separation . The solvent recovery unit dehydration tower and the entrainer recovery column were selected NRTL-HOC and NRTL-RK model the non-ideality of the gas and liquid phase correction . Filtration and drying machine using a scrubber , the gas-liquid separating entrained solids module replacement . The simulation results are consistent with the actual value , verify the reliability of the model . The above unit to establish the model for the CTA whole production process simulation , the simulation results with the actual operation of the device fits the data , and provides a basis for the design and optimization of the production processes .

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