Abstract. Nowadays, creation of waste-free technology, rational use of existing raw materials is one of the urgent issues in industrialized countries. Butadiene is used in many fields due to its unique properties. Butane and butene mixtures contained in natural crude oil waste were isolated and butadiene was obtained based on extractive distillation. To solve these problems, this study proposes new improvements: The extractive distillation section is modified with intermediate heating and the classical columns are replaced by a dividing wall column (DWC) using a heat pump. Rigorous simulations were performed in Aspen Plus for a typical ED process. DWC was found to reduce the energy intensity of the classical distillation section of the BASF process by 54.8% and reduce total annual costs by 29.9%. In addition, the intermediate reboiler reduces the energy density of the ED section by 8.3%, while reducing the CAPEX cost of the system due to the need for a smaller recycle compressor
References:
1. Sattler J. J. H. B. et al. Catalytic dehydrogenation of light alkanes on metals and metal oxides //Chemical reviews. – 2014. – Т. 114. – №. 20. – С. 10613-10653.
2. Jana A. K. Advances in heat pump assisted distillation column: A review //Energy Conversion and Management. – 2014. – Т. 77. – С. 287-297.
3. Mahdi, H. I., & Muraza, O. (2019). An exciting opportunity for zeolite adsorbent design in separation of C4 olefins through adsorptive separation. In Separation and Purification Technology (Vol. 221, pp. 126–151). Elsevier B.V. https://doi.org/ 10.1016/j.seppur.2018.12.004.
4. P.M. Mathias, J.R. Elliott, A. Klamt, Butadiene purification using polar solvents. Analysis of solution nonideality using data and estimation methods, Ind. Eng. Chem. Res. 47 (15) (2008) 4996–5004, https://doi.org/10.1021/ie070774p.
5. Omanov B. S. et al. Optimization of vinyl acetate synthesis process //International Journal of Control and Automation. – 2020. – Т. 13. – №. 1. – С. 231-238.
6. Kindler K., Puhl H. Method for separating a C4-hydrocarbon mixture : пат. 6337429 США. – 2002.
7. Wu Y. C., Hsu P. H. C., Chien I. L. Critical assessment of the energy-saving potential of an extractive dividing-wall column //Industrial & Engineering Chemistry Research. – 2013. – Т. 52. – №. 15. – С. 5384-5399.
8. Uzokov J. R., Mukhamadiev N. K. Sorption characteristics of mesoporous composite SiO2· TiO2 //Central Asian Journal of Medical and Natural Science. – 2021. – Т. 2. – №. 5. – С. 494-498.
9. Ulugboyeva G. O., Uzokov, J. R., Mukhammadiyev, N. Q., & Mukhamadiyev, A. N. Amorphous silica gel as a surfactant for saponins: support, synthesis, and texture characteristics //Central Asian Journal of Medical and Natural Science. – 2023. – Т. 4. – №. 2. – С. 601-607.
10. Wang Y. H., Chien I. L. Unique design considerations for maximum-boiling azeotropic systems via extractive distillation: acetone/chloroform separation //Industrial & Engineering Chemistry Research. – 2018. – Т. 57. – №. 38. – С. 12884-12894.
11. Yu J. et al. Improving the performance of extractive dividing-wall columns with intermediate heating //Industrial & Engineering Chemistry Research. – 2015. – Т. 54. – №. 10. – С. 2709-2723.
12. Schwarz J., Beloff B., Beaver E. Use sustainability metrics to guide decision-making //Chemical engineering progress. – 2002. – Т. 98. – №. 7. – С. 58-63.
13. Mamaziyaeva S. Uzokov, J. R., Mukhammadiyev, N. Q., Synthesis and their texture characteristics of mesoporous silica gel as surfactant supporting rutin //Central Asian Journal of Medical and Natural Science. – 2023. – Т. 4. – №. 2. – С. 608-614.
14. Usmonova H. Uzokov, J. R., Mukhamadiev, N. Q.,Study of structural and electronic properties of (ZnO) n (n= 10÷ 30) nanoclusters using quantum chemical methods //central asian journal of medical and natural science. – 2022. – Т. 3. – №. 6. – С. 428-434.
15. Mamadoliev I. I., Fayzullaev N. I. Optimization of the activation conditions of high silicon zeolite //International Journal of Advanced Science and Technology. – 2020. – Т. 29. – №. 3. – С. 6807-6813.
16. Spivey J. J., Hutchings G. Catalytic aromatization of methane //Chemical Society Reviews. – 2014. – Т. 43. – №. 3. – С. 792-803.