Abstract
With the impact of covid-19 and geopolitical instability, the price of energy and medical-related chemicals are increased. Acetone is used as the main material for the synthesis of important disinfectant isopropanol, which the price is influenced by covid-19 impact. The research on acetone purification, especially on the acetone refining section in the cumene hydroperoxide process is of great importance, which is high in energy cost but the most popular method for acetone production. This paper provided novel energy-saving acetone purification processes with heat integration, heat recovery, and molecular sieve adsorption, and made comprehensive research of different schemes applications with optimization. A modified TAC calculation model for adsorption units is first proposed in this paper, which includes the calculation of adsorption unit cost, molecular sieve loss, and molecular sieve regeneration cost. CO2 emission and thermodynamic efficiency of all the processes are compared. A semi-quantitative analysis is used to compare the relative industrial versatility and process controllability. The results show that the combination of adsorption and heat integration achieves a decrease of 27.75% in energy consumption, 15.30% in TAC, 7.09% in CO2 emission, and a 22.62% relative increase in thermodynamic efficiency.
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