A method for purification of a styrene-containing feedstock includes steps of introducing the styrene-containing feedstock into the middle of an extractive distillation column, and a solvent for the extractive distillation into the upper part of the column; discharging a raffinate oil from the top of the column, and a rich solvent rich in styrene from the bottom of the column. The rich solvent is then introduced into the middle of the solvent recovery column for vacuum distillation to obtain a crude styrene from the top of the solvent recovery column, and a lean solvent is discharged from the bottom of the solvent recovery column and recycled to the upper part of the extractive distillation column. A portion of the rich solvent is sent to a solvent purification zone for a liquid-liquid extraction using water to obtain a mixture of a styrene polymer and styrene.

A method for purification of a styrene-containing feedstock includes steps of introducing the styrene-containing feedstock into the middle of an extractive distillation column, and a solvent for the extractive distillation into the upper part of the column; discharging a raffinate oil from the top of the column, and a rich solvent rich in styrene from the bottom of the column. The rich solvent is then introduced into the middle of the solvent recovery column for vacuum distillation to obtain a crude styrene from the top of the solvent recovery column, and a lean solvent is discharged from the bottom of the solvent recovery column and recycled to the upper part of the extractive distillation column. A portion of the rich solvent is sent to a solvent purification zone for a liquid-liquid extraction using water to obtain a mixture of a styrene polymer and styrene.

Methods and systems for recovering materials from streams from processes for the co-production of propylene oxide and styrene monomer. The processes may permit the recovery of products, such a mono-propylene glycol, or the recycling of products, such as -methyl benzyl alcohol.

Methods and systems for recovering materials from streams from processes for the co-production of propylene oxide and styrene monomer. The processes may permit the recovery of products, such a mono-propylene glycol, or the recycling of products, such as -methyl benzyl alcohol.

The invention relates to a process for the preparation of styrene or substituted styrenes comprising the steps of: (a) subjecting a feed containing 1-phenyl ethanol or substituted 1-phenyl ethanol to a dehydration treatment in the presence of a suitable dehydration catalyst; (b) subjecting the resulting product mixture to a separation treatment, thus obtaining a stream containing water and styrene or substituted styrene and a residual fraction containing heavy ends; (c) treating the stream containing water and styrene or substituted styrene with a base; (d) separating the treated stream of step (c) into a styrene or substituted styrene-rich product stream and a styrene or substituted styrene-lean waste water stream; (e) treating the styrene or substituted styrene-lean waste water stream with steam in a stripping column, thus obtaining a treated waste water stream and a treated stream comprising steam and styrene or substituted styrene.

The invention relates to a process for the preparation of styrene or substituted styrenes comprising the steps of: (a) subjecting a feed containing 1-phenyl ethanol or substituted 1-phenyl ethanol to a dehydration treatment in the presence of a suitable dehydration catalyst; (b) subjecting the resulting product mixture to a separation treatment, thus obtaining a stream containing water and styrene or substituted styrene and a residual fraction containing heavy ends; (c) treating the stream containing water and styrene or substituted styrene with a base; (d) separating the treated stream of step (c) into a styrene or substituted styrene-rich product stream and a styrene or substituted styrene-lean waste water stream; (e) treating the styrene or substituted styrene-lean waste water stream with steam in a stripping column, thus obtaining a treated waste water stream and a treated stream comprising steam and styrene or substituted styrene.

The invention relates to a process for the preparation of styrene or substituted styrenes comprising the steps of: (a) subjecting a feed containing 1-phenyl ethanol or substituted 1-phenyl ethanol to a dehydration treatment in the presence of a suitable dehydration catalyst; (b) subjecting the resulting product mixture to a separation treatment, thus obtaining a stream containing water and styrene or substituted styrene and a residual fraction containing heavy ends; (c) treating the stream containing water and styrene or substituted styrene with a base; (d) separating the treated stream of step (c) into a styrene or substituted styrene-rich product stream and a styrene or substituted styrene-lean waste water stream; (e) treating the styrene or substituted styrene-lean waste water stream with steam in a stripping column, thus obtaining a treated waste water stream and a treated stream comprising steam and styrene or substituted styrene.

Disclosed are a method and a system for producing bio-derived aromatic hydrocarbons from a renewable resource. More particularly, the disclosure provides for the co-location of a biomass reactor unit and an aromatization reactor unit to produce benzene from a renewable source such as plant mass. Hexane produced from cellulose in the biomass reactor unit can be converted to benzene in the aromatization reactor unit and hydrogen produced in the aromatization reactor unit can be used in the biomass reactor unit. Also described is the use of a mixture of bio-derived hexane produced from cellulose and naphtha in an aromatization process.

Disclosed are a method and a system for producing bio-derived aromatic hydrocarbons from a renewable resource. More particularly, the disclosure provides for the co-location of a biomass reactor unit and an aromatization reactor unit to produce benzene from a renewable source such as plant mass. Hexane produced from cellulose in the biomass reactor unit can be converted to benzene in the aromatization reactor unit and hydrogen produced in the aromatization reactor unit can be used in the biomass reactor unit. Also described is the use of a mixture of bio-derived hexane produced from cellulose and naphtha in an aromatization process.

The present invention discloses processes for producing normal alpha olefins, such as 1-hexene, 1-octene, 1-decene, and 1-dodecene in a multistep synthesis scheme from another normal alpha olefin. Also disclosed are reactions for converting aldehydes, primary alcohols, and terminal vicinal diols into normal alpha olefins.