Plant #1 > BD - BD
The BD plant produces high value-added butadiene through the use of the mixed C4 produced from the naphtha cracking plant as raw material. Over 99.5 wt% of high-purity butadiene products are produced through the stages of the first, second extractive distillations and BD refining. Butadiene is primarily used as raw material for synthetic rubber.
■ Production process
01 The First Extractive Distillation
As Mixed-C4 goes through the process of the first extractive distillation of butene, it is separated into the first top of the column.
02 Second extractive distillation
As acetylene goes through the second extraction, it is extracted into the second EDC bottom of the column and transferred to raw material gas in the succeeding process. The butadiene in the second EDC tower cleared of acetylene is transferred to the refining process.
03 BD refining stage
The butadiene-rich acetylene compound produced by the first extractive distillation is fed into the second extractive distillation section.
