Simulation And Optimazition For The Process Of Producing VDF

Vinylidene fluoride is mainly used to produce PVDF, which has excellent all-round character and is widely used in many fields. Presently one of the widely used method of producing VDF is by the pyrogenation of HCFC-142b. Based on the present process date of a plant, a steady-state simulation model was set up and the model parameters was reconciled, and the model has possessed applicability.By using of the model, a 3.2% improvement of the product's output was achieved, and the best feed-in positions were founded, which lay in the stage from NO. 10 to NO. 12, and the corresponding relationship of the purity of product related with the reflux ratio's increase.An improved process was achieved by reducing the tower C1203, in which the VDF product could be drawn out from the tower C1204 as a side-product, which decreased the investment much. After simulation study, the best feed-in position and the best draw-out position were achieved, which in turn were stages NO. 18 and NO.4, and the corresponding relationships of the product purity, removed-ratio of the component CO and the heat duty of the condenser depending on the change of the reflux ratio.