Lyondell Chemical Technology, L.p.

Dan D Lindsey

Sandor M Nagy

Barbara Kimmich

Ha H Nguyen

Anthony S Dearth

Nicholas Bruschi

Justin E Turner

Pranit S Metkar

Debra L Jackson

Karl P Rufener

James D Montano-Lawrence

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 CO-saturated water stream and contacting the CO-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.

Waste stream upgrading in a propylene oxide/styrene coproduction process

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.

By-product stream upgrading in a propylene oxide/styrene coproduction process

In the co-production of propylene oxide and styrene monomer, there is produced a sodium-containing heavy residue stream previously suitable only as a low grade fuel. In accordance with the invention, the heavy residue stream is mixed with a hydrocarbon and an aqueous acid, and the resulting mixture is separated into an aqueous sodium salt-containing slurry phase and an organic phase reduced in sodium.

Residual stream upgrading in a propylene oxide-styrene monomer process

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Houston, TX, United States of America

Dan D Lindsey