Abstract: Methods and systems for fractionating a crude alpha-methylstyrene (AMS) feed using one or more dividing wall columns are provided. The method can include introducing a crude AMS to a fractionation column, wherein the fractionation column contains a dividing wall disposed at least partially within the fractionation column such that an internal volume of the fractionation column is divided into at least a pre-fractionation section and a main fractionation section. The crude AMS can be introduced to the pre-fractionation section of the fractionation column. A light hydrocarbon can be withdrawn from the fractionation column at or proximal a first end thereof, a side-stream can be withdrawn from the main fractionation section of the fractionation column, and a heavy hydrocarbon can be withdrawn from the fractionation column at or proximal the second end thereof.

Abstract: Methods and systems for producing low methanol concentration acetone are provided. The method can include oxidizing and cleaving cumene to produce a crude acetone product. The crude acetone product can be neutralized in a neutralization unit to produce a neutralized crude acetone product. The neutralized crude acetone product can be fractionated in an acetone fractionation column to produce an acetone product and an acetone bottoms product. Methanol can be removed from the acetone bottoms product to produce a methanol-depleted product. The methanol-depleted product can be introduced to the neutralization unit, a dephenolation unit, or both.

Abstract: Systems and methods for processing a hydrocarbon are provided. The method can include gasifying a feedstock within a gasifier to provide a raw syngas. The raw syngas can be processed within a purification system to provide a treated syngas. A first portion of the treated syngas can be converted into a first effluent in a first methanator. The first effluent can be mixed with a second portion of the treated syngas to provide a first mixed effluent. The first mixed effluent can be converted into a second effluent in a second methanator. The second effluent can be mixed with a third portion of the treated syngas to provide a second mixed effluent. The second mixed effluent can be converted into a third effluent in a third methanator.

Abstract: Systems and methods for producing synthetic gas are provided. The method can include gasifying a feedstock within a gasifier to provide a raw syngas. The raw syngas can be processed within a purification system to provide a treated syngas, and the purification system can include a flash gas separator. The treated syngas and a first heat transfer medium can be converted into a synthetic gas, a second heat transfer medium, and a methanation condensate. The methanation condensate can be introduced to the flash gas separator.