Research on Waste Liquid Recovery Process of Hydrogenation Unit of 2-PH Plant
The production process of hydroformylation of butene to 2-PH(2-propylheptanol)includes a two-step saturated hydrofining process,in which a large amount of continuous waste liquid is discharged from the front and rear distillation towers.In this paper,the feasibility of reusing the waste liquid discharged from the hydrofining unit of 2-PH plant by adding a vacuum distillation system is studied in order to recover most of the effective components in the waste liquid and increase the 2-PH yield.The results show that over 90％of 2-PH in the waste liquid can be recovered through vacuum distillation,and the recovered liquid can be pressurized and returned to the original hydrofining unit for further hydrogenation or separate hydrogenation to obtain qualified products.At the same time,simulation analysis is conducted based on Aspen Plus software,and investment cost estimation and preliminary economic calculation are completed,which can provide reference for the treatment of similar waste liquids in domestic 2-PH plants.
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维普
