HOUSTON, Sept. 13 /PRNewswire-FirstCall/ -- Dan F. Smith, President and Chief Executive Officer of Lyondell Chemical Company (NYSE: LYO), will address analysts at the following event:

     Analyst               Banc of America Securities 34th Annual Investment
     Conference:           Conference in San Francisco, Tuesday, September 21,
                           2004, at 2:00 p.m. Pacific Time.  A break-out
                           session with Mr. Smith will immediately follow the
                           presentation at 2:30 p.m. Pacific Time.

     Web Site Access:      Live audio-only webcasting will be provided for
                           both sessions in RealPlayer(TM) and Windows Media
                           formats.  Beginning at 2:00 p.m. Pacific Time on
                           the day of the event, the webcasts can be accessed
                           at http://www.lyondell.com/investorpresentations .

                           The replay webcasts will be available by 5:00 p.m.
                           Pacific Time on September 21, 2004 at
                           http://www.lyondell.com/investorpresentations .
                           The replay will be available until October 8, 2004.

     Presentation:         The slides will be available at the time of the
                           presentations and afterwards at
                           http://www.lyondell.com/investorpresentations .

     Related Disclosures:  Reconciliations of non-GAAP financial measures to
                           GAAP financial measures and any other applicable
                           disclosures (including the slides) will be
                           available at the time of the presentations and
                           afterwards at
                           http://www.lyondell.com/investorpresentations .

    ABOUT LYONDELL

Lyondell Chemical Company, (http://www.lyondell.com ), headquartered in Houston, Texas, is a leading producer of: propylene oxide (PO); PO derivatives, propylene glycol (PG), butanediol (BDO) and propylene glycol ether (PGE); and styrene monomer and MTBE as co-products of PO production. Through its 70.5% interest in Equistar Chemicals, LP, Lyondell also is one of the largest producers of ethylene, propylene and polyethylene in North America and a leading producer of ethylene oxide, ethylene glycol, high value-added specialty polymers and polymeric powder. Through its 58.75% interest in LYONDELL-CITGO Refining LP, Lyondell is one of the largest refiners in the United States processing extra heavy Venezuelan crude oil to produce gasoline, low sulfur diesel and jet fuel.

SOURCE Lyondell Chemical Company
 

CONTACT: media, Susan P. Moore, +1-713-309-4645, or investors, Douglas J. Pike, +1-713-309-7141, both of Lyondell Chemical Company
 

Web site: http://www.lyondell.com