The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Feb. 01, 2018
Lyondell Chemical Technology, L.p., Houston, TX (US);
Sandor Nagy, Seabrook, TX (US);
Ha H. Nguyen, Houston, TX (US);
Dan D. Lindsey, Houston, TX (US);
Barbara Kimmich, Houston, TX (US);
Nicholas Bruschi, Houston, TX (US);
James D. Montano-Lawrence, Houston, TX (US);
Justin E. Turner, Houston, TX (US);
Debra L. Jackson, Houston, TX (US);
Anthony S. Dearth, Houston, TX (US);
Lyondell Chemical Technology, L.P., Houston, TX (US);
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 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.