Styrene Fina/Badger process

Figure 5 illustrates a typical distillation train in a styrene plant. Benzene and toluene by-products are recovered in the overhead of the benzene—toluene column. The bottoms from the benzene—toluene column are distilled in the ethylbenzene recycle column, where the separation of ethylbenzene and styrene is effected. The ethylbenzene, containing up to 3% styrene, is taken overhead and recycled to the dehydrogenation section. The bottoms, which contain styrene, by-products heavier than styrene, polymers, inhibitor, and up to 1000 ppm ethylbenzene, are pumped to the styrene finishing column. The overhead product from this column is purified styrene. The bottoms are further processed in a residue-finishing system to recover additional styrene from the residue, which consists of heavy by-products, polymers, and inhibitor. The residue is used as fuel. The residue-finishing system can be a flash evaporator or a small distillation column. This distillation sequence is used in the Fina-Badger process and the Dow process. 

Filtration rate, 77 330-332 Filtration time, optimizing, 77 346 Fina-Badger s PAR technology, 23 335 Fina-Badger styrene process, 23 339, 340... 

Fina/Badger Styrene/phenylacetylene Crude styrene reduction Process reduces phenylacetylene (PA) levels in styrene to less than 20 ppm, Polystyrene makers require low PA levels 6 2000... 

The Fina/Badger styrene process has evolved through many generations. The most recent design uses a flow diagram as shown in Fig. 5. Recycled and fresh EB... 

Fig. 6 Fina/Badger styrene process dehydrogenation section.

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