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Hello, everyone! I need a literature article on the energy-saving renovation and process optimization of the n-butylene purification unit, but I don’t have a Wanfang account and therefore can’t download it. Could anyone please help me download it? Thank you! http://d.wanfangdata.com.cn/thesis/Y2671975# Table of Contents: Energy-saving renovation and process optimization of the n-butylene refining unit. Export, Collect, Share. Abstract: N-butylene is an important organic chemical raw material that can be used as a comonomer in the production of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE), as well as in other products. With the rapid development of China’s ethylene industry, butyrene production facilities, either imported from abroad or developed domestically, have been put into operation since the 1980s. Currently, the industrial separation processes for n-butylene include extraction distillation, precision distillation, and molecular sieve adsorption. In China, the two-stage precision distillation process developed by the Qilu Petrochemical Research Institute is primarily used to separate high-purity n-butylene. However, due to the large number of tray levels and high reflux ratio in this process, the heat load and energy consumption associated with the separation process are high, which directly affects the production cost of n-butylene. This paper uses Aspen HYSYS to perform process calibration for the n-butylene precision distillation unit of a petrochemical enterprise. The Redlich-Kwong-Soave and Peng-Robinson property methods are selected for the calibration calculations, and the binary interaction parameters of the Redlich-Kwong-Soave and Peng-Robinson equation of state available in the Aspen HYSYS database are utilized to apply thermodynamic corrections. By comparing the calculated values with the design values, the property method and thermodynamic model suitable for this system were selected: the Redlich-Kwong-Soave equation, which provides a reference for industrial modification. To save energy and reduce consumption, this paper focuses on the butylene refining section. Based on the model establishment, the impact of the feed position on energy-saving effects was analyzed, and the parameters for the feed position were optimized. The results show that, under the premise of meeting the process separation requirements, adjusting the feed position has little potential for energy-saving optimization. Based on recent advances in advanced distillation technology, a new scheme for modifying the process in the precision distillation section by using heat pump distillation was proposed, namely top-gas compression heat pump distillation and bottom-liquid throttling open heat pump distillation. Simulation studies were conducted to determine the parameters of this new process, such as the compressor outlet pressure and the cooler outlet temperature. Simulation results show that by using energy-saving flashing of the bottom liquid in the DA2201 distillation column to initiate heat pump distillation, and throttling of the bottom liquid in the DA2202 distillation column for open-type heat pump distillation, the total heating energy consumption is reduced by 36.62% and the total cooling energy consumption is reduced by 80.14%, thereby significantly cutting down energy costs. This paper simulates the precision distillation section of a butylene/MTBE plant, carries out optimization and modification, and compares the design options; it provides a basis for energy-saving modifications and engineering design in butylene production. Collapse ∧ Keywords: n-butylene; extraction distillation process; heat pump distillation; energy-saving renovation; process optimization; molecular sieve adsorption method. Author: Tang Lei. Institution granting the degree: Nanjing University of Technology. Degree awarded: Master’s. Field of study: Chemical Engineering. Supervisor’s name: Bao Zonghong. Year of degree award: 2014. Language: Chinese. Classification code: TQ221.213 TQ028.31