Abstract: Methods for preparing molybdenum-based catalyst for epoxidation reactions using MPG sourced from a propylene oxide/styrene monomer (POSM) production process are described. Streams exiting from the POSM reactor are combined and separated to isolate an aqueous-based, MPG-containing purge stream from other recoverable byproducts of the POSM process. This MPG-containing purge stream is then used as is in the catalyst preparation of molybdenum-based catalyst for epoxidation. Alternatively, the MPG-containing purge stream can undergo additional purification treatments before being utilized in the catalyst preparation.

Abstract: 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.

Abstract: Methods for preparing molybdenum-based catalyst for epoxidation reactions using MPG sourced from a propylene oxide/styrene monomer (POSM) production process are described. Streams exiting from the POSM reactor are combined and separated to isolate an aqueous-based, MPG-containing purge stream from other recoverable byproducts of the POSM process. This MPG-containing purge stream is then used as is in the catalyst preparation of molybdenum-based catalyst for epoxidation. Alternatively, the MPG-containing purge stream can undergo additional purification treatments before being utilized in the catalyst preparation.

Abstract: 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.

Abstract: A method including contacting an organic stream with water and carbon dioxide, whereby sodium is extracted from the organic stream, and separating an aqueous sodium salt-containing phase from an organic phase comprising a reduced sodium content. The organic stream can be a heavy residue formed in the co-production of propylene oxide and styrene. Contacting can include combining the carbon dioxide with the water to form a CO2-saturated water stream and contacting the CO2-saturated water stream with the organic stream, and/or combining the organic stream and the water to form a mixture and injecting the carbon dioxide as a gas thereinto. The method can further include repeating the contacting and the separating one or more times on the organic phase, subjecting the organic phase to ion exchange, or both, to obtain an organic phase having a further reduced sodium content. A system for carrying out the method is also provided.

Abstract: The present disclosure relates to a method including subjecting an organic stream comprising at least one oxygenate to hydrotreatment, whereby a hydrotreatment product comprising ethylbenzene is produced, wherein the organic stream is a product of a process for the production of propylene oxide; and separating an ethylbenzene product stream from the hydrotreatment product, to yield a residual stream.

Abstract: The present disclosure relates to a method including subjecting an organic stream comprising at least one oxygenate to hydrotreatment, whereby a hydrotreatment product comprising ethylbenzene is produced, wherein the organic stream is a product of a process for the production of propylene oxide; and separating an ethylbenzene product stream from the hydrotreatment product, to yield a residual stream.

Abstract: A method including contacting an organic stream with water and carbon dioxide, whereby sodium is extracted from the organic stream, and separating an aqueous sodium salt-containing phase from an organic phase comprising a reduced sodium content. The organic stream can be a heavy residue formed in the co-production of propylene oxide and styrene. Contacting can include combining the carbon dioxide with the water to form a CO2-saturated water stream and contacting the CO2-saturated water stream with the organic stream, and/or combining the organic stream and the water to form a mixture and injecting the carbon dioxide as a gas thereinto. The method can further include repeating the contacting and the separating one or more times on the organic phase, subjecting the organic phase to ion exchange, or both, to obtain an organic phase having a further reduced sodium content. A system for carrying out the method is also provided.