Abstract: A system and a method for separating C4 and recovering 1,3-butadiene are disclosed. The system includes a main washer column, a rectifier column for separating a bottom stream from the main washer column, an after washer column for purifying 1,3-butadiene from a side stream of the rectifier column comprising acetylenes and butadienes, a degasser column for separating a bottom stream from the rectifier column to produce a lean solvent stream. The lean solvent stream comprises primarily the solvent and about 8.3% water used in the main washer column and after washer column. A reboiler for the rectifier column includes one or more heat exchange units. At least one of the heat exchange units of the reboiler for the rectifier column uses steam as heating medium.

Abstract: Process for reduction of bromine index in aromatics, comprising the steps of feeding an aromatics feed stream which contains olefin impurities to a distillation column; withdrawing an overhead stream from the distillation column; subjecting at least a portion of the overhead stream to a treatment for the alkylation or polymerization of olefin in a clay treater to provide a purified overhead stream which is then injected to the aromatics feed stream.