HOUSTON, May 16 /PRNewswire-FirstCall/ -- Karen Twitchell, Vice President and Treasurer of Lyondell Chemical Company (NYSE: LYO), will address financial analysts at the following event:

     Analyst
     Conference:    Banc of America Securities High Yield Bond & Leveraged
                    Finance Conference in Las Vegas
                    Tuesday, May 21, 2002, at 9 a.m. Pacific Time


     Presentation:  The slides will be posted on www.lyondell.com , Investor
                    Relations - Financial News - Investor Presentations - and
                    will be available beginning Tuesday, May 21, 2002, at
                    9 a.m. Pacific Time.

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SOURCE Lyondell Chemical Company
Web site: http: //www.lyondell.com
Photo: NewsCom: http: //www.newscom.com/cgi-bin/prnh/20000921/LYOLOGO AP Archive: http://photoarchive.ap.org PRN Photo Desk, +1-888-776-6555 or +1-212-782-2840
Company News On-Call: http: //www.prnewswire.com/comp/137787.html
CONTACT: media, Anne Knisely, +1-713-309-2643, or investors, Patrick Quarles, +1-713-309-7141, both of Lyondell Chemical Company
CAPTION: LYOLOGO LYONDELL LOGO Lyondell Logo. (PRNewsFoto)[PM] HOUSTON, TX USA 09/21/2000