ブタジエンおよびイソプレン抽出技術 (GPB, GPI法)

抄録

Butadiene and isoprene are important raw materials for synthetic rubbers, resins and other products.
Nippon Zeon developed unique processes to recover high quality butadiene and isoprene monomer respectively by extractive distillation using non aqueous dimethylformamide as selective solvent with a special polymerization inhibitor from C4 stream and C5 stream, respectively (GPB and GPI process).
The characteristics of these processes are quite low energy consumption, high recovery rate, high product quality, no environmental problem, easy operation and maintenace-free processes.
GPB process has been licensed all over the world and more than thirty plants are now under construction or operation. Recently, attention is being focused on the solvent conversion in existing plants for energy saving and operation improvement.
GPI process has no chemical treatment which seems necessary in other processes, and other useful C5 components such as dicyclopentadiene and pentadienes can be easily recovered with additional equipment. These components can be used for various new products in synthetic rubber, resin and fine chemicals industries.